Please see below images and table regarding the VSD Control Circuit and take note of the following:

• EMHEATER VSDs are NPN Mode (PNP and NPN sensors are both supplied with positive and negative power leads and produce a signal to indicate an “on” state. PNP sensors produce a positive output to industrial controls input, while NPN sensors produce a negative signal during an “on” state).
• EMHEATER VSD Control Circuits by default have a bridge between the PLC and +24V Terminals to power all the Digital Input Terminals (if not connected the DI terminals will not work). When using an external power supply to provide power, remove the bridge between the PLC and +24V terminals and connect the External Power Supply input to the PLC terminal (note that EMHEATER VSDs of 2.2kW and smaller do not have a PLC terminal and thus do not allow an external power source to be used).
• EMHEATER VSDs larger than 2.2kW have 2 x GND terminals, both serving the same purpose.
• EMHEATER VSDs of 2.2kW and smaller only has one set of Relay’s (TA-TB-TC and not both TA1-TB1-TC1 and TA2-TB2-TC2). For these smaller VSDs the single relay is programmed using the same parameters as used for Relay 2 (TA2-TB2-TC2).

Please Note: For Smaller Drives with only one set of Relays (TA-TB-TC), use the TA2-TB2-TC2 Relay parameter settings.

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VSD switching frequency refers to the rate at which the DC bus voltage is switched on and off during the pulse width modulation (PWM) process. The on and off switching of the DC voltage is done by Insulated Gate Bipolar Transistors (IGBTs). The PWM process utilises the switching of the IGBTs to create the variable voltage and variable frequency output from the VSD. The switching frequency, sometimes called the “carrier frequency,” is defined using the unit of Hertz (Hz) and is typically in the kHz (Hz*1000) range, typically ranging from 4 to 16khz, or 4000 to 16000 switches on/off per second.

The carrier frequency of the VSD can be used to help reduce motor noise, avoid resonance of the mechanical system, and reduce leakage current to earth and interference generated by the VSD. If the carrier frequency is too low, the output current will have a high harmonic wave and could cause motor power loss and rising temperatures. If the carrier frequency is too high, the frequency inverter will be impacted by power loss, rising temperature and interference. The higher the carrier frequency, the larger the leakage current will be, however, reducing the carrier frequency may result in additional motor noise (installation of a reactor is also an effective method to remove the leakage current).

To determine what switching frequency would work best for your application, it is important to look at the advantages and disadvantages as the switching frequency is increased. Please take note of the following:

• The longer the cable between the VSD and the motor, the higher the harmonic leakage current of the output will be, which will lead to adverse impacts on the VSD and the peripheral devices (for safety purposes, ensure that the VSD and the motor is reliably grounded). Refer to the following table for the suggested carrier frequency setting based on cable length:

*Please Note: If the cable between the VSD and motor is 50m+, it is recommended to install an output choke/reactor, from 150m+ a SineWave Filter is recommended (instead of the Output Choke/Reactor).

• The factory setting of carrier frequency varies based on the VSD power rating (kW). Note that if the set carrier frequency is higher than the factory setting, it will lead to an increase in temperature rise of the VSD’s heatsink. In this case, de-rate the VSD (select a VSD of kW rating larger than normal), otherwise the VSD may overheat (will generate an alarm).
• Adjusting the Carrier Frequency (d6-00) could have various impacts as listed in the following table:

* In the event of a shrill motor noise (audible noise) when running a motor using a VSD – Adjusting the Random PWM Depth (d6-05) can be used to soften the noise and reduce the electromagnetic interference to other equipment (the higher the value the lower the noise, but will increase the temperature of the VSD). If this parameter is set to 0, random PWM is invalid (when adjusting this parameter, lower values are more preferable).

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VSD Sizing/Selection: Please see below guidelines and contact us for verification if necessary:

• For Hammer and Impact Crushers, consider using a Soft Starter instead of a VSD. VSDs are not recommended since the current tend to be very unstable during normal operation, which makes the VSDs prone to go into overload / overcurrent protection. If the feed to the Crusher is controllable (when the current is large, the feed speed should be automatically reduced), one can consider using a VSD, if it is not controllable, a Soft Starter is recommended. Some field conditions do however require the use of a VSD to reduce the impact of the starting current and some users therefor insist on using a VSD (instead of Soft Starter), and mostly use it without any problem (1/10 report overload), but this is then done using the correct design to ensure the feed is controlled.
• Select VSD (kW) of two sizes larger than the Motor (kW) for:
  • Heavy/High Duty (Industrial) Applications (high torque requirement at start-up, e.g., Crusher, Ball Mill, Compressor with 6 Poles or more).
• Select a VSD (kW) size larger than the Motor (kW) for:
  • General Duty Motors with 6 Poles or more (if torque is high).
  • Low Duty (low torque requirement at start-up, e.g., Fan, Centrifugal Pump) Motors with 8 Poles or more.
  • Low Efficiency Motors (e.g., submersible borehole pumps).
  • For Crane/Hoist/Lift/Winch Applications (select a VSD model so that the Motor rated Amps is less than 70% of that of the VSD Output Amp rating and use Brake Units and/or Brake Resistors for quick stopping).
  • For use in areas with altitude over 2000m or ambient temperatures above 40 degrees Celsius (preferably use forced cooling, ambient temperature must always be less than 50 degrees). Please Derating Specifications for more info as well as Cooling/Panel Fan Selection specifications.

Please Note:

• Up to 22kW models = Plastic Housing; 30kW+ models = Metal
• All EM15 models include RS485 terminals on the Control Boards (Modbus RTU Communication).
• Prices for spares available on request only (includes items such as keypad, control card, power card, IGBT model, fan, fan board, capacitor, rectifier).
• Please refer to each specific model’s User Manual for important details regarding product Installation, Setup, Safety Information, Precautions and Maintenance
• Use the VSD to Start and Stop the Motor, do not disconnect the supply from the VSD to the Motor while it is running. Also do not disconnect the power supply to the VSD while it is running the Motor.
• Do not use a VSD to run more than 3 motors simultaneously (For G1 and G13 Series VSDs, do not use more than one motor per VSD).
• Note that if the cable length between the VSD and Motor is more than 50m, we would also recommend that you install an Output Choke/Reactor, for cables more than 150m we recommend installing a SineWave Filter (instead of the Output Choke/Reactor).
• Please use Copper power cables between the VSD and Motor rather than Aluminium cables (impedance of Aluminium cables are higher and cause more harmonics).
• For installations in enclosures, device keypads can be removed and installed into enclosure doors using additional keypad frames and extension cables.
• Please see the VSD and Solar Drive Peripherals section of the VSD Manual for info on additional items that might be required for installation. Also see the applicable peripheral device manuals regarding information on these items.
• PG Cards (Pulse Generator Cards) are also available on request and can be ordered together with custom VSD Control Cards. EMHEATER PG4 Universal Expansion Cards can be ordered for OC Signal Input (No Frequency Division Output) or Differential Signal Input (with Frequency Division Output).
• Software is available for the G1 and G3 Series VSDs which enables the VSDs to be connected to a PC/Laptop via USB/RS485 or RS232/RS485 converter (not included). The software allows configuration and downloading of all the VSD parameters/settings.

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EMHEATER VSD technical specifications regarding the Input Voltage vary depending on the specific model (Input Voltage: 220V/380V/480V/575V/660V±15%) and typically suggests a 15% variance (recommendation, not limited to). The output voltage will not be affected when the DC Bus Voltage (typically 1.414 x the Input Voltage) is high, but the output voltage will be reduced when the bus voltage is too low. The Power Supply Low/High Voltage Errors thus depend on the actual DC Bus Voltage, with Overvoltage and Under Voltage Thresholds for the various models as listed below:

Overvoltage Thresholds 

• G1 Series (Single-phase 220V Supply): Default Overvoltage Threshold = 400V
• G13 Series (Single-phase 220V Supply): Default Overvoltage Threshold = 800V (Supply Voltage is Doubled for this model)
• G2 Series (Three-phase 220V Supply): Default Overvoltage Threshold = 400V
• G3 Series (Three-phase 380V Supply): Default Overvoltage Threshold = 800V
• G4 Series (Three-phase 480V Supply): Default Overvoltage Threshold = 890V
• G5 Series (Three-phase 525V Supply): Default Overvoltage Threshold = 900V

* Parameter bb-28 is used to set the overvoltage threshold for Err05 ~ Err08. Note that the default value is also the upper limit of the VSD’s internal overvoltage protection voltage. The parameter becomes effective only when the setting of bb-28 is lower than the default value. If the setting is higher than the default value, the default value is still applicable.

Under Voltage Thresholds

• G1 Series (Single-phase 220V Supply): Default Under Voltage Threshold = 200V
• G13 Series (Single-phase 220V Supply): Default Under Voltage Threshold = 350V (Supply Voltage is Doubled for this model)
• G2 Series (Three-phase 220V Supply): Default Under Voltage Threshold = 200V
• G3 Series (Three-phase 380V Supply): Default Under Voltage Threshold = 350V
• G4 Series (Three-phase 480V Supply): Default Under Voltage Threshold = 450V
• G5 Series (Three-phase 525V Supply): Default Under Voltage Threshold = 450V

* Parameter bb-29 is used to set the under-voltage threshold for Err09 (or Err08). If the power supply voltage is low on ad hoc basis but generally return to normal, this parameter can be adjusted slightly, but if the voltage is consistently low, it is not recommended.

* Note that Err12 (Power Input Phase Loss) could also occur due to a Power Supply Overvoltage or Under Voltage.

Surge Protection

To protect the VSD against power supply deviations and surges all EMHEATER VSDs include a Protection Board with Shunting Capacitors (for Electromagnetic Interference Suppression – like used in EMI Filters) and Varistors (for Voltage Suppression – also known as Voltage Dependent Resistors – VDRs).

Shunting Capacitors typically redirect current in a specific range, high frequency, away from a circuit or component and feeds the high frequency current/interference into inductors that are arranged in series, and as the current passes through each inductor, the overall strength or voltage is reduced. Optimally, the inductors will reduce the interference to nothing (also called shorting to ground).

Varistors has an electrical resistance that varies with the applied voltage and when a voltage surge exceeding a specified voltage is applied, the varistor suppresses the voltage to protect the circuit.

The Protection Board thus protects EMHEATER VSDs against electromagnetic interferences and power supply surges. Damage to the Protection Board could occur due to a very excessive power surge (more than 685Vac phase to ground) via the power supply in which case it would most likely also damage many of the other components in the rest of the power circuit.

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VSDs include standard Overload protection for both the Motor and Inverter (VSD). The Overload Capacity for the Inverter is noted in the technical manual as follows (Overload Capacity):

• G type:150% rated current 60s; 180% rated current 3s.
• P type: 120% rated current 60s;150% rated current 3s.

These ratings are however only indicating 2 points on the Inverter Current Overload Curve illustrated as follows:

If any of the above scenarios occur, the VSD will stop with the following Error Code:

• Err10: Frequency Inverter Overload (this means the load current exceeds the Inverter’s current limits based on the Inverter Current Overload Curve)

Like the Inverter Current Overload protection, the VSD also protects the Motor against Current Overload. This is based on a similar (but different) curve as used for the Inverter Overload but ignores the Inverter Current Rating and instead use the Motor Rated Current as set by using parameter d0-02 (which would typically be set somewhat lower than the Inverter current rating). The Motor Current Overload Curve is illustrated as follows:

If any of the above scenarios occur, the VSD will stop with the following Error Code:

• Err11: Motor Overload (this means the load current exceeds the Motor’s Current limits based on the Motor Current Overload Curve)

By default, the VSD will Free Stop the motor when Err11 occurs, but this can be changed using parameter bb-32 which allows options to rather stop the motor according to the set stop mode or to continue running.

For additional Motor Protection the following settings can be set to limit load current (this basically allows for another overcurrent point – over and above the Motor Overload Protection Curve points):

• bd-00 (Overset Alarm Current Value): Use this to specify the Current Limit (Amps).
• bd-01(Overcurrent Alarm Delay Time): Use this to specify the Time Delay (Seconds) to allow for.

 For example: If a 4KW inverter rated current is 9A but the requirement is to protect the motor when the load current reaches 6A for more than 5s, Set: bd-00 = 6 and bd-01=5. If the load current exceeds this specified current and time limit, an Err24 protection error will be displayed and the VSD will stop.

 Other related Current Overload Errors that might occur includes the following:

• Err02: Over Current During Acceleration
• Err03: Over Current During Deceleration
• Err04: Over Current at Constant Speed

Err02, 03 or 04 are built-in hardware circuit protection faults (please refer to the manual for more details regarding possible causes and solutions.

For Early Warnings on possible overloads, the VSD Relays and Digital Outputs can also be used to set up triggers/warnings using some of the following Functions:

• Function = 22 (Current 1 Reached): This function can be used as trigger indicating whether the load current falls within a set range, using b4-35 as a set point and b4-36 (Amplitude of any current reaching 1) to indicate the allowed range (variance).
• Function = 23 (Current 2 Reached): This function (same as Function = 22) can be used as trigger indicating whether the load current falls within a set range, using b4-37 as a set point and b4-38 (Amplitude of any current reaching 2) to indicate the allowed range (variance).

If the output current of the VSD is within the positive and negative amplitudes of any current reaching detection value, the corresponding DO becomes ON.

• Function = 27 (Output Current Exceeded Limitation): If the output (load) current of the VSD is equal to or higher than the over current threshold (b4-33 = Over current output threshold) and the duration exceeds the detection delay time (b4-34 = Over current output detection delay time), the corresponding DO becomes ON. Note that these parameters do not influence the motor overload current curve, its merely used as an early warning function.

• Function = 29 (Frequency Inverter Overload Pre-Warning): The VSD judges whether the load exceeds the Inverter overload pre-warning threshold before performing the protection action. If the pre-warning threshold is exceeded, the terminal becomes ON. This pre-warning is based on the inverter overload curve, but with a duration of 10 seconds less than used for the actual Overload Error (Err10).
• Function = 31 (Motor Overload Pre-Warning) – the VSD judges Motor overload according to the motor overload threshold, and terminal becomes ON. The pre-warning coefficient can be adjusted using parameter bb-03 (default = 80%). bb-03 is used to give a warning signal to the control system via DO before motor overload protection occurs. This parameter is used to determine the percentage at which the pre-warning is performed before motor overload protection occurs. The larger the value is, the less advance the pre-warning will be. When the output current of the VSD is greater than the value of the overload inverse time-lag curve multiplied by bb-03, the DO terminal of the VSD set with motor overload pre-warning becomes ON. Note that the value of bb-02 also influence the value used for this pre-warning. Pre-Warning threshold = 220% × bb-02 × rated motor current x bb-03. If the load reaches this value, the VSD reports motor overload pre-warning.

Please Note: For Smaller Drives with only one set of Relays (TA-TB-TC), use the TA2-TB2-TC2 Relay parameter settings.

Adjusting the Inverter Overload Protection Curve:

• Adjust bb-39 (Inverter Overload Protection Gain)

* It is generally not recommended to change this.

Adjusting the Motor Overload Protection Curve:

• Adjust bb-02 (Motor Overload Protection Gain)

* It is generally not recommended to change this.

For the above 2 settings the VSD determines whether the Inverter or Motor is overloaded according to the inverse time-lag curve of the Inverter or Motor overload protection. The inverse time-lag curve of the Inverter or Motor overload protection is:

• For Inverter: 115% × (bb-39) × rated inverter current (if the load remains at this value for one minute, the VSD reports inverter overload fault), or 160% × (bb-39) × rated inverter current (if the load remains at this value for 20 seconds, the VSD reports inverter overload fault).
• For Motor: 225% × (bb-02) × rated motor current (if the load remains at this value for 30 seconds, the VSD reports motor overload fault), or 115% × (bb-02) × rated motor current (if the load remains at this value for 80 minutes, the VSD reports motor overload fault).

It is generally not recommended to change bb-39 or bb-02:

• If the value of bb-02 is set too large, it may damage the motor because the motor overheats but the VSD do no report an error alarm.
• If the value of bb-39 is set too large, it may damage the inverter because the load is more than what the internal circuitry is designed for and the VSD do not report an error alarm.

Disabling the Motor Overload Protection:

Although not advised, this can be done by setting bb-01 =0 (Motor overload protection Disabled)

This means the motor is exposed to potential damage due to overheating. A thermal relay is suggested to be installed between the frequency inverter and the motor.

* It is generally not recommended to change this.

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Terminal Control Modes

EMHEATER drives offer various methods for STOP/START and FWD/REV functions using the drive control board terminals (Digital Inputs instead of Keypad control). Please see below image listing the 2 modes for each of the 2-Line and 3-Line Control Methods, as well as descriptions that follow:

Two-Line Control – Mode 1

Forward/Reverse rotation of the motor is decided by DI1 and DI2 (most commonly used mode).

If only a Start/Stop function is required, any of the switches in Block A will be suitable for K1. If Forward and Reverse functionality is also required, the switch in Block B will be suitable. Note that for this mode, if power returns after a power failure, the inverter will respond to the actual state of the switch).

Two-Line Control – Mode 2

DI1 is the RUN enabled terminal and DI2 determines the running direction.

If only a Start/Stop function is required, any of the switches in Block A (image below) will be suitable. If Forward and Reverse functionality is also required, the switch in Block B (image below) will be suitable or alternatively 2 switches can be used (any of the switches in Block A will be suitable for K1 and any of the switches in Block D will be suitable for K2). Note that for this mode, if power returns after a power failure, the inverter will respond to the actual state of the switch/es).

Three-Line Control – Mode 1

DI3 is the RUN enabled terminal, and the direction is decided by DI1 and DI2.

• If SB1 is ON: the inverter will start Forward rotation when SB2 is ON and start Reverse rotation when SB3 is ON.
• If SB1 is OFF: The inverter stops immediately.
• During normal start-up and running, SB1 must remain ON.

For Run function (Forward and Reverse buttons) and Stop function, the 3-button switch from Block C will be required. Note that for this mode, if power returns after a power failure, the inverter will not respond to the state before power failure, so the Start button needs to be pressed again to enable the Run function).

Three-Line Control – Mode 2

DI3 is the RUN enabled terminal, and the RUN command is given by DI1 whilst the direction is decided by DI2.

• If SB1 is ON: the inverter will start running when SB2 is ON in Forward rotation when K is OFF and in Reverse rotation when K is ON.
• The inverter stops immediately after SB1 becomes OFF.
• During normal start-up and running, SB1 must remain ON, SB2 is effective immediately after ON

If only a Start/Stop function is required, any of the 2-button switches in Block C will be suitable. If Forward and Reverse functionality is also required, an additional switch from Block D will be required. Note that for this mode, if power returns after a power failure, the inverter will not respond to the state before power failure, so the Start button needs to be pressed again to enable the Run function).

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EMHEATER offers two single-phase to 3-phase Converter products (for AC Motors only). These converters are however complete Variable Speed Drive (VSD) units which merely also converts the Single-Phase (220V) power supply to a 3-Phase output. Note that these Converter VSDs can be used to run AC motors only, so if there are any other 3-Phase components the Converter VSD cannot be used to supply power for that (cannot be used as a 3-Phase Power Supply for resistance loads such as an Oven/Welding Machine etc.).

Note that many 3-Phase motors can often be wired to use either a 3-Phase 220V OR 3-Phase 380V power supply – depending on this there are 2 different models to select from (select a kW option based on the kW and Amp rating of your motor):

• G1: Single-Phase (220V ±15%) Input and 3-Phase (~220V) Output
• G13: Single-Phase (220V ±15%) Input and 3-Phase (~380V) Output – ideally use a size option larger than that of the motor kW for this model (Motor Rated Amps < 70% of Converter VSD Output Amps)

Please refer to your motor nameplate to verify whether the motor is 3-Phase 220V or 3-Phase 380V (or possibly allow for both options). Please see image below as reference:

Please Note (Converter VSDs):

• Important to note that the requirements for the supply side Amps is high in order to generate the 3-Phase output from a Single-Phase 220V supply – for the G13 model (~380V output), expect the supply side Amp requirements to be ~4 times the rated motor Amps and for the G1 model (~220V output), expect the supply side Amp requirements to be ~2 times the rated motor output Amps. Please ensure cabling, switches and power supply is sufficient for the supply side Amp requirements.
• For high duty applications a Converter VSD rating (kW) option larger than the motor rating (kW) is recommended and for heavy duty / industrial applications a Converter VSD rating (kW) option of two sizes larger than the motor rating (kW) is recommended (please contact us for verification if necessary). A larger size option Converter VSD is also recommended for Fan and Pump motors with 8 Poles or more and for other motors with 6 Poles or more (if torque is high) as well as for low efficiency motors (e.g., submersible borehole pumps).
• Note that if the cable between the Converter VSD and motor is more than 50m, we would also recommend that you install an Output Choke/Reactor, for cables more than 150m we recommend installing a SineWave Filter (instead of the Output Choke/Reactor).
• Please use Copper power cables between the Converter VSD and Motor rather than Aluminium cables (impedance of Aluminium cables are higher and cause more harmonics).
• Use the Converter VSD to Start and Stop the motor, do not disconnect the supply from the Converter VSD to the motor while it is running. Also do not disconnect the power supply to the Converter VSD while it is running the motor.

Please see video illustration HERE.

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External STOP Methods

EMHEATER Drives offers various methods to use as External STOP functions using the drive Digital Input Terminals. Some of these methods are to be used as a Normal STOP function (Decelerate or Free Stop) or as an Emergency STOP function (quickest possible deceleration time), whilst others are intended as Fault STOP functions (resulting in an Error status).

This can be done by setting the relevant Digital Input Terminal function (b3-00 ~ b3-04) equal to one of the values as listed in the below table:

* Please note that the Normally Open/Close logic used for these terminals can be switched using parameter b3-25 (DI Valid Selection).

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The following illustrates how to wire an External Brake Unit (with Resistor/s) or Resistor/s (Without External Break Unit) to a VSD:

The following describes how to wire each of the 2 possible scenarios:

External Brake Unit with Resistor (for 30kW VSDs and larger)

• Connect the External Brake Unit P+ Terminal to the VSD P+ Terminal and External Brake Unit P- Terminal to the VSD P- Terminal.
• Refer to the Brake Unit Manual for more details here.

Brake Resistor without Break Unit (for VSDs up to 22kW)

• Connect the Resistor Terminals to the VSD P+ and PB Terminals.

* Please Note:

• When using a braking resistor or brake unit, please set parameter A2-05 = 0 (if it is not set = 0 it may cause deceleration time extension problems).
• When using a braking resistor or brake unit for a Crane/Hoist/Lift/Winch Application, please see the Crane/Hoist/Lift/Winch Setup Excel file (available for download) which provides an example of all the various parameters to be set and the applicable values to be used.
• Please install the Brake Unit and/or Resistor/s external from the VSD due to heat generated by the resistors.

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The VSD Relay Outputs can be used to control Panel Fans which switch on when the VSD is running and switches off when the VSD stops running. In order to do that a Power Source can be connected to one of the VSD Relays with the Panel Fan connected to the Normally Open Relay Output. Using the Relay Output parameters, the Outputs can be controlled by the VSD Running Status by setting the following parameter:

• When using Relay 1 (TA1-TB1-TC1), set b4-02 = 2
• When using Relay 2 (TA2-TB2-TC2 or TA-TB-TC), set b4-03 = 2

Please Note: For Smaller Drives with only one set of Relays (TA-TB-TC), use the TA2-TB2-TC2 Relay parameter settings.

Contact driving capacity:

• 250 Vac, 3 A, COSø = 0.4
• 30 Vdc, 1 A

Suggested Cooling as follows:

*Please also see Drive Cooling/Panel Fan Selection information here.

• Active Cooling (air condition and water cooling) Rule of Thumb = 75 BTU/h is required for every 1 HP
• Passive Cooling (fan cooling) Rule of Thumb = 4 CFM is required for every 1 HP to maintain 10°C above ambient in the enclosure

*Please also see Drive Derating information here.

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Crusher / Feeder Speed Control VSDs Setup

Crushers (especially Hammer / Impact / Jaw Crushers) are mainly used for primary crushing of large pieces of materials. These are typically harsh working environments with heavy loads. These applications therefore have a high risk of overload (causing the system to stop running) due to uneven feeding or hard/large materials entering the crusher and getting stuck in the crushing chamber or between the rollers.

These overload conditions typically result in a very high spike in current drawn by the motor (various risks associated with that), which, from a VSD perspective, typically cause the VSD to trip (Err10 Overload or Err02/03/04 Overcurrent fault protection). VSDs typically has limitations to its overload capacity (typically rated current 1.5 times for 60s, 1.8 times for 3s, or instantaneous protection at 2 times rated current), please see FAQ entry HERE for a more detailed explanation on this.

* Note that for Hammer / Impact / Jaw Crushers (due to above implication), it is generally advised to rather use a Soft Starter (instead of VSD), but for scenarios where a VSD is required (due to additional functionality and features when compared to Soft Starters), the following setup and VSD selection is suggested:

For both the main Crusher Motor and the Feeder (Feeding Conveyor Belt) Motor, select VSDs (kW) of two sizes larger than the Motors (kW). For the Vibrating Screen Motor, select a VSD (kW) size larger than the Motor (kW). In addition to this (from setup perspective), the feeding speed of the conveyor belt should be controlled by the current of the main crusher motor (to reduce the feeder speed when the current of the crusher motor is large), and the feeder motor should only start once the crusher motor is running.

For the Feeder VSD start/stop control, the Crusher VSD relay (TA2/TC2 or TA/TC) is used to ensure that when the Crusher VSD reaches the FDT1 detection frequency, the relay output triggers the start-up of the Feeder VSD (and thus only starts the feeding process once the crusher is running at the desired speed). When the frequency is lower than the FDT1 detection frequency, the Crusher VSD relay (TA2/TC2 or TA/TC) is disconnected and the Feeder VSD will stop the Feeder Motor.

For speed control the AO1/GND analog output of the Crusher VSD (0-10V signal) is used as input to the AI1/GND analog input of the Feeder VSD. This is thus used as a closed-loop PID control setup to avoid overcurrent protection shutdown of the Crusher VSD (by controlling the feeding speed based on the Amps drawn by the Crusher Motor).

In addition to this, the AI1/GND analog input of the Feeder VSD is set up with a limit to ensure that when the Crusher VSD Amps reaches a too high value, the Feeder VSD is stopped immediately (use b5-06 to set the limit, which will initiate a fault when reached – fault needs to be reset manually).

Wiring Diagram:

Parameter Settings:

For both VSDs, ensure to set the Motor Parameters (d0-00~d0-04) according to the Motor Nameplate details and then perform the Auto Tuning (d0-30).

Crusher VSD Parameters:

• Set b4-03 = 17 (Relay 2 Function set as FDT1 Output which will be used as trigger to open/close the relay)
• Set b4-22 = 45 (FDT1 set at 45Hz which will be used as the trigger frequency to open/close the above relay)
• Set b4-23 = 0 (Frequency Detection Hysteresis set to use a 0% offset)
• Set b6-01 = 2 (AO2 Output Function set to use the Motor Output Current – corresponds to 0~Double the Motor Rated Current)

*In addition to the above one would typically adjust the Acceleration (set b0-21 = 60s) and Deceleration (set b0-22 = 200s) times as needed and also use an External Start/Stop Switch (see FAQ entry HERE) and an Emergency Stop (see FAQ entry HERE).

Feeder VSD Parameters:

• Set b0-02 = 1 (Command Source Selection set as Terminal Control to allow Start/Stop via the Crusher VSD relay)
• Set b0-03 = 8 (Main Frequency Source X Selection set as PID to allow speed control based on Crusher Motor Amps)
• Set b1-07 = 1 (Stop Mode set as Free Stop)
• Set b5-05 = 0 (AI1 Input Voltage Lower Limit of Protection set to be irrelevant)
• Set b5-06 = 8 (AI1 Input Voltage Upper Limit of Protection set as additional protection against overcurrent – 8V corresponds to 1.6 times the Crusher Motor Current reached, which will initiate Err27 Fault Protection – used by b7-00 and b7-00 that follows)
• Set b7-00 = 40 (VDI1 Function Selection set as User Defined Fault1 to be used which will be triggered based on b7-11 that follows)
• Set b7-11 = 34 (VDO1 Function Selection set for AI1 Input Exceeded Limitation which will trigger fault b5-06 based on the value limit set using b7-00)
• Set C0-00 = 0 (PID Setting Source set as C0-01)
• Set C0-01 = 40 (PID Digital Setting set as the desired speed of the Feeder Motor – adjust according to specific scenario to ensure Crusher Motor Amps is as desired when operating normally – typically use Target Crusher Motor Current / 2 * Crusher Motor Rated Current (this is because AO2 is rated up to double the motor rated current))
• Set C0-03 = 0 (PID Feedback Source set to use AI1)
• Set C0-07 = 0.1 (Integral Time TI1 set to have a response time of 0.1s)
• Set C3-09 = 0 (Set Sleep Selection as Active/Available)

*In addition to the above one would typically adjust the Acceleration (set b0-21 = 10s) and Deceleration (set b0-22 = 6s) times as needed and also use an Emergency Stop (see FAQ entry HERE).

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To setup a Low Current Alarm (typically used for Dry Run Protection for Water Pumps), the following parameter settings can be used:

• Set b7-00 (VDI1) = 38 (Normally Open input of external fault – this is to specify the Virtual Digital Input to give an Error when triggered by the Virtual Digital Output) – the default for b3-04 = 38 and first needs to be set to a different value to allow setting b7-00 = 38 – only one terminal can use a value at a time)
• Set b7-11 (VDO1) = 26 (Zero current state – this is to set the Virtual Digital Output to trigger a zero current state output)
• Set b4-31 (Zero current detection level) = set below current value (% of motor current as set using d0-02) – this is to define the current value to be used as the Zero Current (Low Current) trigger
• Set b4-32 (Zero current detection delay time) = delay protection time – this is to define for how long the current value can be below the Zero Current (Low Current) before initiating a trigger event

When the Low Current Alarm is triggered the VSD will show Err15: External Equipment Fault (External fault signal via virtual I/O). In some cases it might be required to set the VSD to automatically restart again after a delay period. This requires that the VSD is set up to clear the Error to allow the Auto Restart. This can be done as described in the following FAQ entry Here.

* Please Note: For VSDs up to 55kW using software versions before V0.12 (released 15 Sept 2022), the B4-31 current value of 10% = d0-02, for version V0.12 and later the B4-31 current value of 100% = d0-02 for all VSD kW ranges.

For scenarios where this setup might be applicable, please see:

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using the VSD Parameters to set a Fixed Target Pressure, please see the relevant FAQ entry here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external analog signal (such as a PLC) to modify the target pressure (Variable Target Pressure), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external Multi-Stage Switch to modify the target pressure (Target Pressure Selector), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Outflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Inflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with AI Input Overrun Limit (using a Pressure Transmitter as STOP), please see the relevant FAQ entry Here.

For additional Protection Features, please also see:

– To set up a EMHEATER VSD End of Curve Parameters (PID Signal Loss Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Restart (Delayed) after Low Current Protection Condition Occurred (Dry Run Protection Reset), please see the relevant FAQ entry Here.

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VSD Frequency (motor speed – Hz) can be controlled using an external device (PID) such as a Pressure/Level Transmitter. For parameter settings, please consider the following example:

Example/Requirements as follows:

• PID: A 2-wire Level Transmitter is used requiring a 24VDC supply and with 0-5m measurement range, providing a 4-20mA output (analog output).
• Connection: Connect the PID red cable to the VSD +24V terminal; Connect the green cable to the VSD AI2 terminal; Connect the VSD COM and GND terminals to each other. Please use shielded cable to prevent electromagnetic interference by other appliances on the analog signal sent to the VSD. For EMC Mitigation: 1) Allow for at least 20cm distance between communication cables and motor wires. 2) Do not use the same cable tray. 3) Insert wires in metal pipes if possible.
• Frequency Requirement: For this scenario the requirement is to put a level transmitter in a large dam/tank in order to measure how full/empty the dam/tank is. The requirement is then for the VSD to run a motor (pump) which pumps water from the dam/tank at full speed when the dam/tank is full (Level Transmitter will measure 5m), and to gradually reduce the speed of the motor as the dam/tank level drops in order to maintain a dam/tank level of 1m (below this level the VSD must switch off).

VSD Parameters to be set as follows:

• b0-02 = 1 (set Command Source selection = Terminal Control)
• b0-03 = 8 (Set Main Frequency Source to use PID)

• C0-00 = 0 (PID Setting Source set use C0-01)
• C0-01 = 20% (PID Digital Setting as % of target Level – 1m target level of max 5m level = 20%)
• C0-03 = 1 (PID Feedback Source = AI2)
• C0-04 = 1 (PID Action Direction – set as Reverse Action – determines the positive and negative effects of PID)
• b5-12 = 2 (Set AI2 Minimum Value) – (transmitter range = 4 to 20mA, so 4mA in a range from 4-20mA corresponds to a value of 2 if the range is 0 to 10)
• b5-14 = 10 (Set AI2 Maximum Value) – (transmitter range = 4 to 20mA, so 20mA (at 5m) in a range from 4-20mA corresponds to a value of 10 if the range is 0 to 10)

Sleep/WakeUp settings:

• b2-24 = 30 (Dormant Frequency)
• b2-25 = 30 (Dormant Delay Time)
• b2-26 = 31 (WakeUp Frequency)
• b2-27 = 10 (WakeUp Delay Time)

For other similar scenarios please also see:

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using the VSD Parameters to set a Fixed Target Pressure, please see the relevant FAQ entry here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external analog signal (such as a PLC) to modify the target pressure (Variable Target Pressure), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external Multi-Stage Switch to modify the target pressure (Target Pressure Selector), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Inflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with AI Input Overrun Limit (using a Pressure Transmitter as STOP), please see the relevant FAQ entry Here.

For additional Protection Features, please also see:

– To set up a EMHEATER VSD End of Curve Parameters (PID Signal Loss Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Low Current Protection (Dry Run Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Restart (Delayed) after Low Current Protection Condition Occurred (Dry Run Protection Reset), please see the relevant FAQ entry Here.

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VSD Frequency (motor speed – Hz) can be controlled using an external device (PID) such as a Pressure/Level Transmitter. For parameter settings, please consider the following example:

Example/Requirements as follows:

• PID: A 2-wire Pressure Transmitter is used requiring a 24VDC supply and with 0-10 Bar measurement range, providing a 4-20mA output (analog output).
• Connection: Connect the PID red cable to the VSD +24V terminal; Connect the green cable to the VSD AI2 terminal; Connect the VSD COM and GND terminals to each other. Please use shielded cable to prevent electromagnetic interference by other appliances on the analog signal sent to the VSD. For EMC Mitigation: 1) Allow for at least 20cm distance between communication cables and motor wires. 2) Do not use the same cable tray. 3) Insert wires in metal pipes if possible.
• Frequency Requirement: For this scenario the requirement is to fit a pressure transmitter at the bottom of a large dam/tank in order to measure how full/empty the dam/tank is. The requirement is then for the VSD to run a motor (pump) which fills the dam/tank at max speed when the dam/tank is empty (Pressure Transmitter will measure 0 Bar), and to gradually reduce the speed of the motor as the dam/tank fills up, with the slowest speed ~ 40Hz – at which point the dam/tank is close to full. When the dam/tank is full (Pressure Transmitter will measure 5 Bar) the VSD must switch off.

VSD Parameters to be set as follows:

• b0-02 = 1 (set Command Source selection = Terminal Control)
• b0-03 = 3 (Set Main Frequency Source to use AI2 – ensure jumper is set to “I”)
• b0-17 = 40 Hz (Set the Frequency Lower Limit)
• b2-17 = 1 (Set Running Mode to STOP when the set frequency is less than the Lower Limit frequency)
• b5-12 = 2 (Set AI2 Minimum Value) – (Setting range = 0 to 10 and transmitter range = 4 to 20mA, so 4mA in a range from 4-20mA corresponds to a value of 2 if the range is 0 to 10)
• b5-13 = 100 (Set corresponding value (Frequency) = 100% (50Hz) if AI2 = Minimum Value above)
• b5-14 = 6 (Set AI2 Maximum Value) – (Setting range = 0 to 10 and transmitter range = 4 to 20mA, so 12mA (at 5 Bar) in a range from 4-20mA corresponds to a value of 6 if the range is 0 to 10)
• b5-15 = 79.9 (Set corresponding value (Frequency) = 79.9% (39.95Hz) if AI2 = Maximum Value above)

For other similar scenarios please also see:

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using the VSD Parameters to set a Fixed Target Pressure, please see the relevant FAQ entry here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external analog signal (such as a PLC) to modify the target pressure (Variable Target Pressure), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external Multi-Stage Switch to modify the target pressure (Target Pressure Selector), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Outflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with AI Input Overrun Limit (using a Pressure Transmitter as STOP), please see the relevant FAQ entry Here.

For additional Protection Features, please also see:

– To set up a EMHEATER VSD End of Curve Parameters (PID Signal Loss Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Low Current Protection (Dry Run Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Restart (Delayed) after Low Current Protection Condition Occurred (Dry Run Protection Reset), please see the relevant FAQ entry Here.

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The End of Curve Parameter settings for pump systems are used to detect leaks/breaks in the system which can cause damage if not detected and corrected promptly. End of Curve detection is based on the measurement of the feedback pressure and the speed of the motor. If there is a leak/break in the system, pressure will decrease and the pump will accelerate to try and increase the system pressure to the desired pressure. When the drive is running at maximum speed with a feedback signal less than a specified % (C0-25) of the set point pressure (expected pressure) for a specified time period (C0-26), a fault alarm is initiated (Err31).

This is used to detect low pressure at full speed or whether the PID signal is lost. Example:

• Set C0-25 = 97 %
• Set C0-26 = 15 sec

When it is detected that the PID feedback is less than 97% the expected feedback for time period exceeding 15 seconds, the VSD will stop and display fault alarm Err31.

For scenarios where this setup might be applicable, please see:

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using the VSD Parameters to set a Fixed Target Pressure, please see the relevant FAQ entry here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external analog signal (such as a PLC) to modify the target pressure (Variable Target Pressure), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external Multi-Stage Switch to modify the target pressure (Target Pressure Selector), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Outflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Inflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with AI Input Overrun Limit (using a Pressure Transmitter as STOP), please see the relevant FAQ entry Here.

For additional Protection Features, please also see:

– To set up a EMHEATER VSD Low Current Protection (Dry Run Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Restart (Delayed) after Low Current Protection Condition Occurred (Dry Run Protection Reset), please see the relevant FAQ entry Here.

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In some cases it might be necessary to manage multiple VSDs using a single Analog input – for example: Using a single pressure transmitter to manage the speed of multiple VSDs. For such a scenario the Pressure Transmitter (Analog Input) can be connected in a series connection as illustrated in the image below (Pressure Transmitter is connected to VSD 1 and VSD 2 is connected to VSD 1).

VSD Wiring required as follows:

• VSD 1: Connect the Transmitter to the required AI Input and +24V and also bridge COM and GND.
• VSD 2: Connect the the required AI Input and GND to VSD 1’s AO1 and GND.

VSD Parameters to be set as follows:

• VSD 1: If using AO1 set b6-01 (or b6-02 if using AO2) equal to 7 (if AI1 was used for Transmitter Input, otherwise equal to 8 for AI2 or equal to 9 for AI3).
• VSD 2: Update the necessary AI (AI1, AI2 or AI3) parameters to ensure it corresponds to the 0 -10V output of VSD 1’s AO Output. Also ensure VSD 2’s AI input’s jumper is set for Voltage Input.

Please Note:

• Please use shielded cable to prevent electromagnetic interference by other appliances on the Analog signal sent to the VSD. For EMC Mitigation: 1) Allow for at least 20cm distance between communication cables and motor wires. 2) Do not use the same cable tray. 3) Insert wires in metal pipes if possible.
• When using a metal transmitter connected to a metal piping system, please use a plastic connecter/fitting to isolate the transmitter from the metal piping system, or ideally use a plastic (PEX / PVC) pipe segment (20 – 30 cm long) to isolate the transmitter from the metal piping system. Also ensure the metal piping system is properly grounded (other electrical equipment and/or appliances could cause current/voltage on the metal piping system which will have an adverse effect on the transmitter output values).
• When using pressure transmitters, a buffer tube can also be added to prevent shock pressure transmission.

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External On /Off lights can be used to indicate a VSDs running status by using the VSD Relay Outputs. In order to do that a Power Source can be connected to one of the VSD Relays with the Off Light connected to the Normally Closed Relay Output and the On Light connected to the Normally Open Relay Output. Using the Relay Output parameters, the Outputs can be controlled by the VSD Running Status by setting the following parameter:

• When using Relay 1 (TA1-TB1-TC1), set b4-02 = 2
• When using Relay 2 (TA2-TB2-TC2 or TA-TB-TC), set b4-03 = 2

Please Note: For Smaller Drives with only one set of Relays (TA-TB-TC), use the TA2-TB2-TC2 Relay parameter settings.

Contact driving capacity:

• 250 Vac, 3 A, COSø = 0.4
• 30 Vdc, 1 A

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Many applications use two or more motors for operation, but sometimes some of the motors need not to start after some time interval after another motor (sequential control with some delay). Such a Leader-Follower (Master/Slave) Start and Stop application is thus where two or more VSDs are linked to maintain a predetermined order at which the motors are forced to Start and Stop. Typically, the first drive is configured as the “Leader” or “Master” and the subsequent drive/s that follow the master are referred to as the “Slaves” or “Followers”.

To use one VSDs Running State (VSD 1 = Master VSD) as a signal to specify another VSDs Start-up (VSD 2 = Follower VSD), please connect the VSDs and set the required parameters as follows:

Connections:

• Connect Leader VSD TA2 with Follower VSD DI1
• Connect Leader VSD TC2 with Follower VSD COM

Please Note: For Smaller Drives with only one set of Relays (TA-TB-TC), use the TA2-TB2-TC2 Relay parameter settings.

Parameter Settings VSD2 (Follower):

• Set b0-02 = 1 (Terminal Control)
• Set b3-00 = 1 (DI1 Forward Run) – this is the default value for b3-00
• The Start can be delayed by setting b3-15 = DI1 ON delay time in seconds (max 3000s)
• The Stop can be delayed by setting b3-16 = DI1 OFF delay time in seconds (max 3000s)

Parameter Settings VSD1 (Leader):

• Set b4-03 = 2 (Frequency Inverter Running)
• Alternative to the above, the following Relay States can also be used:
  • b4-04 = 7 (Frequency Upper Limit Reached)
  • b4-04 = 19, 20 or 21 (Reaching a Pre-defined Frequency)
  • b4-04 = 22 or 23 (Reaching a Pre-defined Current)
  • Alternative (or additional) delay options than the Follower VSD Digital delays, the Leader VSD Relay output can also be delayed by setting the Relay On or OFF delay time by setting parameters:
    • b4-14 = Relay 2 ON delay time in seconds (max 3000s)
    • b4-15 = Relay 2 OFF delay time in seconds (max 3000s)

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A Leader-Follower (Master/Slave) application is where two or more drives are electronically synchronised (Cascade Control). Typically, the first drive is configured as the “Leader” or “Master” and the subsequent drive/s that follow the master are referred to as the “Slaves” or “Followers”.

To use one VSDs Running Frequency (VSD 1 = Master VSD) as a reference point to specify another VSDs Running Frequency (VSD 2 = Follower VSD), but also to set the Follower VSD to run at 80% of the speed of the Leader VSD, please connect the VSDs and set the required parameters as follows:

Connections:

• Connect Leader VSD AO1 with Follower VSD AI1
• Connect Leader VSD GND with Follower VSD GND

*Please use shielded cable to prevent electromagnetic interference by other appliances on the analog signal sent to the VSD. For EMC Mitigation: 1) Allow for at least 20cm distance between communication cables and motor wires. 2) Do not use the same cable tray. 3) Insert wires in metal pipes if possible.

Parameter Settings:

• VSD 1 (Leader): Set B6-05 = 0.8 (Set AO1 Gain = 80%)
• VSD 2 (Follower): Set B0-03 = 2 (Set main Frequency source = AI1)

For more information regarding the use of VSDs for Leader-Follower applications, please our blog entry here.

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Requirement:

A Constant Water Pressure Setup solution is required for a VSD with Water Pump, but for maintenance purposes it is required, on an ad hoc basis, to override the Constant Water Pressure Setup and run the motor at a predefined speed (irrespective of pressure).

Solution:

VSDs offer a Frequency Source Switchover function which can be used to alternate between 2 different Frequency Sources. Unfortunately, the built-in PID Setting Source option Pressure Mode (C0-00=7) cannot be used as a Switchover option due to clashes in logic when used in combination with other Frequency Sources. As an alternative one can however use the PID feature in a somewhat different way to overcome these problems. This requires different settings than the usual Constant Water Pressure settings and the double line display (Keypad) will not display the feedback pressure on the top keypad display line (will display the running Amps which is the default for VSDs). The display parameter (b9-11) can however be changed to rather display the PID Feedback (b9-11=16) value, which will help to provide an indication of what the feedback pressure is, but will require adjusting C0-05 (PID Feedback Range) to adjust the range to display it as according to the applicable pressure value. Please see: https://www.emheater.co.za/faq/faq-keypad-display/

To set this up, please follow the wiring and parameter suggestions as follows:

Wiring:

• PID: Connect PID between +24V and AI2 and bridge GND and COM
• Frequency Source Switch: Connect a Switch between DI3 and COM to be used to switch between Frequency Source X and Frequency Source Y
• ON/OFF Switch: “If Required” – connect an On/Off Switch between DI1 and COM (and set b0-02=1)

Parameter Settings:

• Set b0-03 = 8 (Main Frequency Source X = PID)
• Set b0-04 = 6 (Auxiliary Frequency Source Y = Multi-Function)
• Set b0-07 = 02 (Frequency Source Logic Selection = Switchover between X and Y)
• Set b3-02 = 15 (DI3 = Frequency Source Switchover)
• Set C0-00 = 0 (PID Setting Source = C0-01)
• Set C0-03 = 1 (PID Feedback Source = AI2)
• Set b5-12 = 2 and b5-14 = 10 (to align with a 4-20mA feedback range)
• Set C0-01 = Set desired Target Pressure (Target Pressure as % of PID Feedback Range)
• Set b2-26 = Set desired WakeUp Frequency (must be set before setting b2-24)
• Set b2-27 = Set desired WakeUp Delay Time
• Set b2-24 = Set desired Sleep Frequency (must be set after setting b2-26 since it must be smaller than b2-26)
• Set b2-25 = Set desired Sleep Delay Time
• Set C1-00 = Set desired frequency to be used after switching to Frequency Source Y (as a % of the Maximum Frequency as set by b0-13)

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To setup a Forward and Reverse Running function for a drive a 3-way Switch can be used (see image below for wiring) with the following parameter settings:

• Set b0-02 = 1 (Terminal Control) – This is to ensure the Start/Stop functions are triggered via the Terminal Controls.
• Set b3-00 = 1 (To set DI1 as the Forward Run terminal)
• Set b3-01 = 2 (To set DI2 as the Reverse Run terminal)

As another option (without using rocker switch), 2 separate On/Off switches can also be used as follows:

• Switch 1: Connect switch to DI1 and COM
• Switch 2: Connect switch to DI2 and COM

Set the following parameter settings:

• Set b0-02 = 1 (Terminal Control) – This is to ensure the Start/Stop functions are triggered via the Terminal Controls.
• Set b3-00 = 1 (To set DI1 as the Forward Run terminal)
• Set b3-01 = 2 (To set DI2 as the Reverse Run terminal)
• Set b3-13 = 2 (To set the Terminal Command Mode to Three-Line mode)

Based on these the drive will operate as follows:

• If Switch 1 is Off, the Drive will not Run the Motor (irrespective of the status of Switch 2)
• If Switch 1 is On and:
  • Switch 2 is On: The Drive will Run the Motor in a FWD Direction
  • Switch 2 is Off: The Drive will Run the Motor in a REV Direction

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To setup a Forward and Reverse Jogging function for a drive a Toggle Switch can be used (see image below for wiring) with the following parameter settings:

• Set b0-02 = 1 (Terminal Control) – This is to ensure the Start/Stop functions are triggered via the Terminal Controls (Normal Start/Stop function will also require an external on/off switch).
• Set b3-03 = 4 (To set DI4 as the Forward JOG terminal)
• Set b3-04 = 5 (To set DI5 as the Reverse JOG terminal)
• Set b2-00 = User Defined Value (Default value for JOG speed = 2Hz)
• Set b2-01 = User Defined Value (Default JOG Acceleration time is model dependant)
• Set b2-02 = User Defined Value (Default JOG Deceleration time is model dependant)

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VSDs can be set up to use 3 different Command Sources by setting Parameter b0-02:

• 0 = Keypad / Operation Panel Control (LED on Keypad will be OFF)
• 1 = Terminal Control (LED on Keypad will be ON)
• 2 = Communication Control (LED on Keypad will BLINK)

Other than changing this using the b0-02 parameter, this can also be changed by connecting switches to the Digital Input Terminals (DI1 to DI5). The selected Digital input/s can then be programmed to use the following 2 functions to change the control mode:

• Function 18 = Terminal 1 for Command Source Switchover -> If the Command Source is set to Terminal Control (b0-02 = 1), this terminal is used to perform switchover between Terminal Control and Keypad / Operation Panel control. If the Command Source is set to Communication Control (b0-02 = 2), this terminal is used to perform switchover between Communication Control and Keypad / Operation Panel control.

• Function 19 = Terminal 2 for Command Source Switchover -> Used to perform switchover between Terminal Control and Communication Control. If the Command Source is Terminal Control, the system will switch over to Communication Control after this terminal becomes ON.

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EMHEATER offers a basic software package which allows connection between a PC/Laptop and a VSD via a USB to RS485 Dongle. The Software Installation package can be downloaded from the Downloads page here and the User Guide can be downloaded from here.

The Software Package allows for viewing and editing VSD parameters (as well as downloading a copy which can be imported again at a later stage), it allows for running and stopping the VSD, and it allows for viewing and saving running parameters while the VSD is in operation.

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In some instances, it might be required to switch a drive on/off by switching the power supply to the drive on/off (remote on/off power supply switch) – or required for a VSD to automatically start again after a power failure if it was switched on. Switching the power supply off while a drive is running a motor could however cause damage to the drive capacitors (cause instantaneous discharge shock impact on capacitors which will reduce the service life of the capacitors). It is therefore advised to rather install an Intermediate Relay to immediately instruct the VSD to Free Stop when a power failure occurs. This will also prevent the Err09 (Power Failure) fault occurring. Further to this, when switching the power supply immediately on again to start a motor could cause high current shocks if the motor did not yet stop completely (due to inertia), which could cause overcurrent failures. For these reasons one would rather use a Terminal Start/Stop method and also delay the start process. Doing this by switching the power source on and off can be accomplished by using an Intermediate Relay and setting the following Parameters:

• Install the Intermediate Relay as per the diagram below – only one set of Normally open Contacts is required (the diagram is for a drive with Single Phase 230V supply. If the input voltage is 3-Phase 380V, choose a 380V Intermediate Relay)
• Set b0-02 = 1 (Terminal Control)
• Set b1-07 = 1 (Free Stop Mode)
• Set b3-15 = 15.0 (DI1 On Delay time to delay the Start-up Process)

    Intermediate Relay  

    Relay Connection

Using the above method will always use a Free Stop method. If this is not desired, the Intermediate Relay can also be connected to a different DI Terminal and COM with that DI Terminal function set = 43 (Free Stop) and also switching the DI logic (NO/NC) for that DI Terminal. Then a Normal Stop (Decelerate to Stop) method can be used for general Stop functions(b1-07=0) using the On/Off Switch and when there is a power failure the Intermediate Relay will ensure a Free Stop. Example: Connect Intermediate Relay to DI2 and COM and set b3-01=43 and then switch D12 logic by setting b3-25=00010.

Please Note: Using this method, when there is a power failure, the drive will go into Free Stop and switch off, and if the On/Off switch is still in an On state when the power returns, the drive will start automatically, but if it’s just a sudden power failure and the power returns very quickly before the drive switched off completely, the drive will not start automatically, the On/Off switch then first needs to be switched off and then on again (if it was still in an On state).

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In some instances, it might be required to Start and Stop multiple motors simultaneously (in some cases it might be required to have a fixed delay between start-ups of the various motors, in which case delay can be set on the DI terminals for the specific VSDs). In order to do that using an external On/Off switch, the VSDs needs to wired to each other with a single On/Off Switch as follows:

Then also set the following parameter on each VSD:

• b0-02 = 1 (terminal control)

Note: If the External Switch has a Normally Closed connection (not Normally Open) the VSD Start/Stop function will operate in the opposite way intended. In this case, also set b3-25 = 00001(Low Level Valid).

Note: If it is required to delay the start of any of the specific motors (Cascade Control), for that motor VSD, set a Start delay on DI1 using b3-15 (DI1 ON delay time). If it is required to delay the stop of any of the specific motors, for that motor VSD, set a Stop delay on DI1 using b3-16 (DI1 OFF delay time).

If these VSDs also need to Stop simultaneously in the event of a Fault occurring on any one of the VSDs, each VSDs Relay output (with Fault Output trigger) also needs to be wired into the circuit as follows:

The also set the following Relay parameter on each VSD:

• b4-03 = 3 (Fault Output)

Please Note: For Smaller Drives with only one set of Relays (TA-TB-TC), use the TA2-TB2-TC2 Relay parameter settings.

Please see example of Large VSD Control Board with 2 sets of Relays below:

* Please Note: If the On/Off Switch is in the On state and a power failure occurs, the VSDs will automatically start again when the power returns (for such a scenario its best to rather make use of a Free Stop Mode for both VSDs and also allow for a Start Delay on the First VSD when the power returns). It is however not ideal to Start/Stop a VSD by switching the power supply On/Off – which is typically the case with regular power failures (causes instantaneous discharge shock impact on capacitors which will reduce the service life of the capacitors) – for a better method of achieving this using an Intermediate Relay, please see the following FAQ Entry: How to Setup an Intermediate Relay to Power a VSD On/Off. A better Stop/Start method for the first VSD would be to use separate Stop and Start Push Buttons as described below:

When using Push Buttons use a 3-Line Mode Stop/Start Setup:

• b0-02 = 1 (Terminal Control)
• b3-13 = 2 (3-Line Mode 1)
• b3-00 = 1 (RUN Enabled) -> DI1 Terminal Connection
• b3-02 = 3 (3-Line Control) -> DI3 Terminal Connection
• 3^rd Line Connected to COM

If using FWD/REV as well with above, set:

• b3-13 = 3 (3-Line Mode 2)
• b3-01 = 2 (FWD/REV) -> DI2 Terminal Connection

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When using a normal Open/Close Switch, connect the Normally Open wire with DI1 and the Common wire with Common and then set:

• b0-02 = 1 (terminal control)

Ideally also set the following (please see notes further on for further explanation):

• Set b1-07 = 1 (Free Stop Mode)
• Set b3-15 = 15.0 (DI1 On Delay time to delay the Start-up Process)

If the External Device only has a Normally Closed connection (not Normally Open) the VSD Start/Stop function will operate in the opposite way intended. In this case, also set:

• b3-25 = 00001(Low Level Valid)

* Please Note: If the On/Off Switch is in the On state and a power failure occurs, the VSD will automatically start again when the power returns (for such a scenario its best to rather make use of a Free Stop Mode and also allow for a Start Delay when the power returns). It is however not ideal to Start/Stop a VSD by switching the power supply On/Off – which is typically the case with regular power failures (causes instantaneous discharge shock impact on capacitors which will reduce the service life of the capacitors) – for a better method of achieving this using an Intermediate Relay, please see the following FAQ Entry: How to Setup an Intermediate Relay to Power a VSD On/Off. A better Stop/Start method would be to use separate Stop and Start Push Buttons as described below:

When using Push Buttons use a 3-Line Mode Stop/Start Setup:

• b0-02 = 1 (Terminal Control)
• b3-13 = 2 (3-Line Mode 1)
• b3-00 = 1 (RUN Enabled) -> DI1 Terminal Connection
• b3-02 = 3 (3-Line Control) -> DI3 Terminal Connection
• 3^rd Line Connected to COM

If using FWD/REV as well with above, set:

• b3-13 = 3 (3-Line Mode 2)
• b3-01 = 2 (FWD/REV) -> DI2 Terminal Connection

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Instead of using the Potentiometer on the drive Keypad, an external Potentiometer can also be used for speed control (which can then be installed at an alternate location). This can be done by connecting the External Potentiometer to the Drive Control Terminals as follows (for a 3-Wire Potentiometer):

• Connect the Power Pins of the Potentiometer (usually the outside 2 connection points) to the +10V and GND terminals on the Drive (Swop connections for Clockwise vs Anti-Clockwise Operation).
• Connect the Output/Signal Pin of the Potentiometer to AI1 (usually the centre connection point). Please note that the AI1 jumper on the control board needs to be set to use 0~10V (which is the default). When using AI2 or AI3 the jumper needs to be set accordingly.
• Set b0-03 = 2 (to use AI1 as speed reference point)

Potentiometer Wiring

*Please Note:

• Swopping the Voltage and Ground wires on the Potentiometer will change the Acceleration/Deceleration direction (Clockwise vs Anti-Clockwise).
• Only use Potentiometers with a resistance range of 1 kΩ~5kΩ.
• Please use shielded cable to prevent electromagnetic interference by other appliances on the analog signal sent to the VSD. For EMC Mitigation: 1) Allow for at least 20cm distance between communication cables and motor wires. 2) Do not use the same cable tray. 3) Insert wires in metal pipes if possible.

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Instead of using the Potentiometer on the drive Keypad, an external Potentiometer can also be used for FWD/REV direction and speed control (which can then be installed at an alternate location). This can be done by connecting the External Potentiometer to the Drive Control Terminals as follows (for a 3-Wire Potentiometer):

• Connect the Power Pins of the Potentiometer (usually the outside 2 connection points) to the +10V and GND terminals on the Drive (Swop connections for Clockwise vs Anti-Clockwise Operation).
• Connect the Output/Signal Pin of the Potentiometer to AI1 (usually the centre connection point). Please note that the AI1 jumper on the control board needs to be set to use 0~10V (which is the default). When using AI2 or AI3 the jumper needs to be set accordingly (Please use shielded cable to prevent electromagnetic interference by other appliances on the analog signal sent to the VSD).

To set the Drive for Terminal Control (Start/Stop/Speed Control via Potentiometer):

• b0-02 = 1 (Command Source Selection = Terminal Control)
• b3-00 = 0 (DI1 = No Function -> This allows for VDI1 to bet set = 1)
• b7-00 = 1 (VDI1 function set as RUNNING Command)

To set the Drive to use the Potentiometer connected to AI1 as speed reference:

• b0-03 = 2 (Main Frequency Source = AI1)

Since the Potentiometer will be used for Forward and Reverse control as well as to STOP the drive, a 4-point curve (to ensure linear acceleration and deceleration) and Voltage Limit Protection setup is advised.

• To set the 4-Point Curve and STOP criteria:
• • b5-44 = H.324 (AI Curve Selection = last digit is for AI1 Curve = 4 -> Curve 4: 4-Point)
  • b7-11 = 34 (VDO1 function set = AI1 Input Exceeding Limitation -> will initiate STOP in case of AI1 output failing b5-05 or b5-06 limits)
  • b5-05 = 4.50V (AI1 Input Voltage Lower Limit of Protection)
  • b5-06 = 5.50V (AI1 Input Voltage Upper Limit of Protection)

–>  These two parameters (b5-05 / b5-06) prevents operation and will STOP the drive in the voltage range of 4.5 to 5.5 V.

• To set the linear acceleration/deceleration curves:
  • b5-24 = 4.50V (AI Curve 4 Inflection Point 1 Input)
  • b5-25 = 0.0% (Corresponding Setting of AI curve 4 inflection point 1 Input) -> % of Max Hz
  • b5-26 = 5.50V (AI Curve 4 Inflection Point 2 Input)
  • b5-27 = 0.0% (Corresponding Setting of AI curve 4 inflection point 2 Input) -> % of Max Hz

• To set the FWD and REV speed (frequency) limits:
  • b5-23 = -100.0% (Corresponding Setting of AI1 Curve 4 Minimum Input) – to allow the speed to go to 50Hz in Reverse direction (% of Max Hz)
  • b5-29 = 100.0% (Corresponding Setting of AI1 Curve 4 Maximum Input) – to allow the speed to go to 50Hz in Forward direction (% of Max Hz)

Since we are using the 10V input, leave the following parameters as per their default values:

• b5-22= 0.00V (AI Curve 4 Minimum Input)
• b5-28=10.00V (AI Curve 4 Maximum Input)

It is also possible to use a 2-Point curve (especially if the range for the STOP criteria is negligibly small). In such a scenario, the following parameter settings would apply:

• b5-44 = H.321 (Curve 1: 2-Point)
• b5-07 = 0.00V (AI1 input Minimum Value)
• b5-08 = -100.0% (Corresponding setting of AI1 minimum input value)
• b5-09 = 10.00V (AI1 input Maximum Value)
• b5-10 = 100.0% (Corresponding setting of AI1 maximum input value)

*Please Note:

• Swopping the Voltage and Ground wires on the Potentiometer will change the Acceleration/Deceleration direction (Clockwise vs Anti-Clockwise).
• Only use Potentiometers with a resistance range of 1 kΩ~5kΩ.
• Please use shielded cable to prevent electromagnetic interference by other appliances on the analog signal sent to the VSD. For EMC Mitigation: 1) Allow for at least 20cm distance between communication cables and motor wires. 2) Do not use the same cable tray. 3) Insert wires in metal pipes if possible.

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Setup an External Fault Device to Stop a VSD (but still use Keypad Start/Stop function):

From the External Device, connect the Normally Open or Normally Closed wire with DI1 and connect the Common wire with Common and then set:

• If it is a Normally Open connection:
  • b3-00 = 38 (default = 01)
• If it is a Normally Closed connection:
  • b3-00 = 39 (default = 01)

In this scenario, keep b0-02 = 0 (Default: Keypad Control) to allow for the VSD to Start/Stop using the VSD keypad. If the External device Stops the VSD the VSD will show Err15 which indicates that the external fault device caused the VSD to stop.

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• Connect a relay output to monitor whether the inverter is running or not (inverter status)
• If you use Relay 1, set b4-02 = 2

Please Note: For Smaller Drives with only one set of Relays (TA-TB-TC), use the TA2-TB2-TC2 Relay parameter settings.

Contact driving capacity:

• 250 Vac, 3 A, COSø = 0.4
• 30 Vdc, 1 A

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• Set b1-07 = 0 (default)

From the External Device, connect the Normally Closed wire with DI1 and Common with Common and then set:

• Set b3-00 = 44 (Emergency Stop)
• If the External Device is Normally Open, also set b3-25 = 1

*When the terminal becomes ON, the VSD stops within the shortest time. During the stop process, the current remains at the set current upper limit (to enable the VSD to stop in emergency state).

*When using a normal deceleration stoppage procedure and reducing the deceleration time to a very short time, a brake unit and/or resistor might be required to burn off the excess energy (not required for above Emergency Stop Procedure – only if stoppage time needs to be reduced even further than what is possible via the emergency stop).

• For VSDs more than 22KW, a brake unit and brake resistor is also needed.
• For VSDs up to 22kW a brake resistor is already built in, but an additional brake unit might be required depending on the application.

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To set up a EMHEATER VSD with a Pressure Transmitter to provide protection against over pressure, the pressure transmitter can be set up as a STOP trigger to stop the VSD once a certain pressure value has been reached. To do this, please see the below wiring and parameter settings.

Wiring

• Connect GND and COM
• Connect Pressure Transmitter to 24V and AI1
• Set AI1 jumper to I

*Please use shielded cable to prevent electromagnetic interference by other appliances on the analog signal sent to the VSD. For EMC Mitigation: 1) Allow for at least 20cm distance between communication cables and motor wires. 2) Do not use the same cable tray. 3) Insert wires in metal pipes if possible.

To set AI1 Min/Max Values

The AI1 Min/Max Parameter settings ranges between 0V and 10V (in this example the output will not be Volt but rather mA, but the parameter will still be set as if it is a ‘Volt’ value). Since the output from the Pressure Transmitter is 4-20mA, the max of 20mA will correspond to 10V and the minimum of 4mA will correspond to 2V (10V/20mA = 0.5 and then 0.5 * 4mA = 2V). Therefore, the ‘Volt’ equivalent output of the Pressure Transmitter will be 2V to 10V. Thus set:

• b5-07= 2.00 (AI1 Minimum input value)
• b5-09 = 10.00 (AI1 Maximum input value)

To set the STOP function for the Input Limit

• b7-00 = 38 (VDI1 function selection = Normally Open input of external fault)
• b7-11 = 34 (AI1 input limit exceeded – will give Error15 if AI1 Input limit is exceeded – Press ‘Reset’ (STOP) to clear the Error)

To set the Input Limit (max Bar before STOP)

• b5-05=0.00 (AI1 input voltage lower limit of protection – will also STOP when input value = 0V, which is not applicable in this scenario as the Minimum is 2V)
• b5-06 = Value based on Pressure Limit (AI1 input voltage upper limit of protection – see calculation further down)

To set the Top Line of the Keypad Display to show the AI1 Output (‘Volt’ equivalent output of the Pressure Transmitter)

• b9-11 = 9 (U0-09 = AI1 voltage)

Calculating b5-06 (based on Pressure Limit)

Since the Output = (b5-07) 2 to (b5-09) 10, this means the value Range = 8 (10 – 2). So, a 50% output from the Pressure Transmitter will provide a value of 6V, derived as 8 (Range) * 50% + 2 (b5-07: the minimum input value). Example:

To set the max pressure of a 25 Bar Transmitter = 15 Bar, use 15 / 25 = 0.6 and calculate b5-06 as 8 (Range) * 0.6 + 2 = 6.8 (Thus, set b5-06 = 6.8)

The below chart shows different ‘Voltage’ outputs and Bar (Pressure) readings for 2 different Pressure Transmitters (a 10 Bar and 25 Bar Transmitter).

For other similar scenarios please also see:

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using the VSD Parameters to set a Fixed Target Pressure, please see the relevant FAQ entry here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external analog signal (such as a PLC) to modify the target pressure (Variable Target Pressure), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external Multi-Stage Switch to modify the target pressure (Target Pressure Selector), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Outflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Inflow), please see the relevant FAQ entry Here.

For additional Protection Features, please also see:

– To set up a EMHEATER VSD End of Curve Parameters (PID Signal Loss Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Low Current Protection (Dry Run Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Restart (Delayed) after Low Current Protection Condition Occurred (Dry Run Protection Reset), please see the relevant FAQ entry Here.

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When the simple programmable logic controller (PLC) mode is used as the frequency source, the running frequency of the drive can be switched over among the 16 frequency points (Multi-Function Group C1 Parameters). You can set the holding times and acceleration/deceleration times of the 16 frequency points using the Simple PLC Group C2 Parameters.

Assume for example a scenario where the VSD should accelerate during start-up up to 40Hz, and then maintain that speed for 3 minutes (180s), after which it should then accelerate further to 50Hz.

Set the following parameters:

• b0-03 = 7 (Main Frequency Source = Built-in PLC)
• C1-00 = 80% (Multi-Function 0 = 80% of 50Hz = 40Hz)
• C1-01 = 100% (Multi-Function 1= 100% of 50Hz = 50Hz)
• C2-00 = 1 (To keep the value after the cycle is complete)
• C2-02 = 180s (Running time of simple PLC segment 0 – corresponding to Multi-Function 0)
• C2-03 = 0 (Acceleration/Deceleration time of segment 0 – where 0 = b0-21/22; 1 = b2-03/4; 2 = b2-05/6; 3 = b2-07/8)
• C2-04 = 1s (Running time of simple PLC segment 1 – corresponding to Multi-Function 1)
• C2-05 = 0 (Acceleration/Deceleration time of segment 0 – where 0 = b0-21/22; 1 = b2-03/4; 2 = b2-05/6; 3 = b2-07/8)

* Please Note: Do not set b0-18=1 to Reverse the Direction of the motor when using the Simple PLC, if the motor direction needs to be changed, ideally change the motor wiring or use negative values when setting the Multi-Function Parameters (C1-00 and C1-01 in the above example).

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Connect a On/Off Switch between terminals DI1 and Common and then set:

• b0-02 = 1 (terminal control)
• b1-07 = 1 (free stop mode)
• b3-15 = 15 (DI1 On Delay time to delay the Start-up Process)

When the switch is On, the VSD will Start and Run the motor. If a power failure occurs, the VSD will automatically start the motor up again once the power supply returns.

* Please Note: This is not ideal if the requirement is to Start/Stop a VSD by switching the power supply On/Off (causes instantaneous discharge shock impact on capacitors which will reduce the service life of the capacitors) – for a better method of achieving this using an Intermediate Relay, please see the following FAQ Entry: How to Setup an Intermediate Relay to Power a VSD On/Off

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To setup a VSD for a specific motor:

• Make sure that all Motor Parameters has been set (d0-00 up to d0-04)

d0-00: Motor Rated Power
d0-01: Motor Rated Voltage
d0-02: Motor Rated Current
d0-03: Motor Rated Frequency
d0-04: Motor Rated Speed

• Perform Auto tuning if applicable/required.

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To set up a EMHEATER VSD for a Crane/Hoist/Lift/Winch Application, please see the Crane/Hoist/Lift/Winch Setup Excel file (available for download) which provides an example to installers of the various parameters to be set and the applicable values to be used.

Please Note: For Smaller Drives with only one set of Relays (TA-TB-TC), use the TA2-TB2-TC2 Relay parameter settings.

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The following scenario explains how to set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external analog signal (such as a PLC) to modify the target pressure (Variable Target Pressure).

For other similar scenarios please also see:

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using the VSD Parameters to set a Fixed Target Pressure, please see the relevant FAQ entry here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external Multi-Stage Switch to modify the target pressure (Target Pressure Selector), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Outflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Inflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with AI Input Overrun Limit (using a Pressure Transmitter as STOP), please see the relevant FAQ entry Here.

For additional Protection Features, please also see:

– To set up a EMHEATER VSD End of Curve Parameters (PID Signal Loss Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Low Current Protection (Dry Run Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Restart (Delayed) after Low Current Protection Condition Occurred (Dry Run Protection Reset), please see the relevant FAQ entry Here.

SCENARIO

Use a Pressure Transmitter to measure water pressure in a pipe (use 4-20 mA Pressure Transmitter) and control the speed of the VSD based on a Target Pressure as set using a PLC input (use 4-20 mA PLC Input). If a 20 Bar Pressure Transmitter is used it will read 12 mA from the Pressure Transmitter if the water pressure in the pipe is 10 Bar – if the PLC sends a signal of 16 mA the target pressure is seen as 15 Bar and then the VSD speed will increase until the Pressure Transmitter feedback also equals 16 mA (and thus equals 15 Bar).

When the measured water pressure (Pressure Transmitter Feedback) reaches the target pressure (PLC Input), the VSD speed (Frequency) will slow down and keep slowing down until it stops (0 Hz) or until the pressure drops again. To set the VSD to stop (Sleep) before reaching a speed of Zero Hz, a Sleep and WakeUp Frequency can also be specified (Sleep/WakeUp feature can be activated or deactivated depending on requirements). If the VSD slows its speed down to the specified sleep Frequency, the VSD will immediately continue to slow down to a complete stop. Once the speed required to reach the target pressure is more than the WakeUp frequency, the VSD will automatically start again.

WIRING

• Pressure Transmitter Wiring

Connect to AI2 and +24V (Jumper default position is set for mA)

• PLC Input Wiring

Connect to AI1 and +24V (Set the Jumper to mA – default is for Volts)

• Connect COM and GND

PARAMETER SETTINGS

For the Pressure Transmitter (4-20 mA / 0-20 Bar) Feedback Set:

• C0-03 = 1 (PID Feedback Source – to use AI2 as Feedback Source)
• B0-03 = 8 (PID Control – This is set so the VSD uses the PID to Control the Frequency)
• B5-12 = 2 (Minimum Value of the Analog Input – Value of Minimum Transmitter output if the range is updated to correspond to a 0-10 value range)
• B5-14 = 10 (Maximum Value of the Analog Input – Value of Maximum Transmitter output if the range is updated to correspond to a 0-10 value range)

For the PLC Input (4-20 mA / 0-20 Bar) Set:

• C0-00 = 1 (AI1 – This is set so the VSD uses AI1 as Input from the PLC to determine the Target Pressure)
• B5-07 = 2 (Minimum Value of the Analog Input – Value of Minimum PLC output if the range is updated to correspond to a 0-10 value range)
• B5-09 = 10 (Maximum Value of the Analog Input – Value of Maximum PLC output if the range is updated to correspond to a 0-10 value range)

For the Sleep / WakeUp Function Set:

• C3-09 = 0 (If setting C0-00 = 1 and C3-09 = 1 then there is NO Sleep / WakeUp Function (Disabled)).
• B2-24 = Dormancy Frequency (Frequency used as Switch OFF frequency to go to Sleep)
• B2-25 = Dormant Delay Time (Time delay before VSD goes to Sleep when reaching b2-25 Frequency)
• B2-26 = WakeUp Frequency (Frequency used as Switch ON frequency to Start the VSD)
• B2-27 =WakeUp Delay Time (Time delay before VSD STARTS again when reaching b2-26 Frequency to reach the target pressure)

The following table illustrates how/when the Sleep/WakeUp function is Activated/Disabled:

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The following scenario explains how to set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external Position Selector (Multi-Step) Switch to modify the target pressure (Target Pressure Selector).

For other similar scenarios please also see:

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using the VSD Parameters to set a Fixed Target Pressure, please see the relevant FAQ entry here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external analog signal (such as a PLC) to modify the target pressure (Variable Target Pressure), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Outflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Inflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with AI Input Overrun Limit (using a Pressure Transmitter as STOP), please see the relevant FAQ entry Here.

For additional Protection Features, please also see:

– To set up a EMHEATER VSD End of Curve Parameters (PID Signal Loss Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Low Current Protection (Dry Run Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Restart (Delayed) after Low Current Protection Condition Occurred (Dry Run Protection Reset), please see the relevant FAQ entry Here.

SCENARIO

Use a Pressure Transmitter to measure water pressure in a pipe (use 4-20 mA Pressure Transmitter) and control the speed of the VSD based on a Target Pressure as set using a Position Selector (Multi-Step) Switch. If a 10 Bar Pressure Transmitter is used it will read 12 mA from the Pressure Transmitter if the water pressure in the pipe is 5 Bar – if the Position Selector (Multi-Step) Switch is set to specify a target pressure of 5 Bar and the VSD speed will increase until the Pressure Transmitter feedback also equals 12 mA (and thus equals 5 Bar).

When the measured water pressure (Pressure Transmitter Feedback) reaches the target pressure (as set using the Position Selector Switch), the VSD speed (Frequency) will slow down and keep slowing down until it stops (0 Hz) or until the pressure drops again. To set the VSD to stop (Sleep) before reaching a speed of Zero Hz, a Sleep and WakeUp Frequency can also be specified (Sleep/WakeUp feature can be activated or deactivated depending on requirements). If the VSD slows its speed down to the specified sleep Frequency, the VSD will immediately continue to slow down to a complete stop. Once the speed required to reach the target pressure is more than the WakeUp frequency, the VSD will automatically start again.

Position Selector (Multi-Step) Switch WIRING

Wired to DI3 and DI4 and COM

Position Selector (Multi-Step) Switch PARAMETER SETTINGS

To specify the Digital Terminals used by the Position Selector Switch:

• b3-02 = 6 (To set DI3 Terminal as Multi-Function Terminal 1)
• b3-03 = 7 (To set DI4 Terminal as Multi-Function Terminal 2)

To set the Pressure Transmitter Max Feedback (PID Setting Feedback Range):

• C0-05 = User Defined Value (10 for 10 Bar Pressure Transmitter)

To Define the Target Pressure:

• C1-01 = User Defined Value (to set Reference 1 pressure as a percentage of C0-05)
• C1-00 = User Defined Value (to set Reference 0 pressure as a percentage of C0-05)
• C1-02 = User Defined Value (to set Reference 2 pressure as a percentage of C0-05)
• b0-13 = User Defined Value (max speed default = 50Hz)

* For a detailed article regarding “How to Setup a Manual Speed Selector Switch”, please FAQ entry here.

Update Keypad Monitoring Parameters

To set the top display line to show the Feedback Pressure, set:

• b9-11 = 16 (16 = U0-16 PID Feedback)

To add the Target Pressure to the bottom display line set:

Parameters Displayed while in Run Status:

• • b9-02 = H.801F

Parameters Displayed while in Stop Status:

• • b9-04 = H.0833

* For more detailed articles on updating the Parameters being displayed on the Keypad, please see:

• How to Change the Default Keypad Parameter Display Lines for Double Line Keypads FAQ entry here.
• How to Change the List of Parameters Displayed on the Keypad FAQ entry here.

PID WIRING

• Pressure Transmitter Wiring

Connect to AI2 and +24V (Jumper default position is set for mA)

• Connect COM and GND

PID PARAMETER SETTINGS

For the Pressure Transmitter (4-20 mA / 0-10 Bar) Feedback Set:

• C0-03 = 1 (PID Feedback Source – to use AI2 as Feedback Source)
• C0-00 = 6 (PID Setting Source – to use Multi-Function as Setting Source)
• B0-03 = 8 (PID Control – This is set so the VSD uses the PID to Control the Frequency)
• B5-12 = 2 (Minimum Value of the Analog Input – Value of Minimum Transmitter output if the range is updated to correspond to a 0-10 value range)
• B5-14 = 10 (Maximum Value of the Analog Input – Value of Maximum Transmitter output if the range is updated to correspond to a 0-10 value range)

For the Sleep / WakeUp Function Set:

• C3-09 = 0 (If setting C0-00 = 1 and C3-09=1 then there is NO Sleep / WakeUp Function (Disabled)).
• B2-24 = Dormancy Frequency (Frequency used as Switch OFF frequency to go to Sleep)
• B2-25 = Dormant Delay Time (Time delay before VSD goes to Sleep when reaching b2-25 Frequency)
• B2-26 = WakeUp Frequency (Frequency used as Switch ON frequency to Start the VSD)
• B2-27 =WakeUp Delay Time (Time delay before VSD STARTS again when reaching b2-26 Frequency to reach the target pressure)

The following table illustrates how/when the Sleep/WakeUp function is Activated/Disabled:

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To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using the VSD Parameters to set a Fixed Target Pressure, please see the Constant Water Supply Guide Excel file (available for download) which explains and guides installers through the process of determining the various parameters to be set and the applicable values to be used. For more information regarding the use of VSDs for constant water pressure, please our blog entry Here.

For other similar scenarios please also see:

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external analog signal (such as a PLC) to modify the target pressure (Variable Target Pressure), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external Multi-Stage Switch to modify the target pressure (Target Pressure Selector), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Outflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Inflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with AI Input Overrun Limit (using a Pressure Transmitter as STOP), please see the relevant FAQ entry Here.

For additional Protection Features, please also see:

– To set up a EMHEATER VSD End of Curve Parameters (PID Signal Loss Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Low Current Protection (Dry Run Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Restart (Delayed) after Low Current Protection Condition Occurred (Dry Run Protection Reset), please see the relevant FAQ entry Here.

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Set the following parameters when installing a T-Series VSD for Synchronous Motors:

Motor Parameters:

• b0-00 = 2 (Motor type set to synchronous motor)
• b0-13 = Set as motor nameplate (Maximum frequency)
• b0-15 = Set as motor nameplate (Frequency upper limit)
• d0-00 = Set as motor nameplate (Motor rated power)
• d0-01 = Set as motor nameplate (Motor rated voltage)
• d0-02 = Set as motor nameplate (Motor rated current)
• d0-03 = Set as motor nameplate (Motor rated frequency)
• d0-04 = Set as motor nameplate (Motor rated speed)

Motor Control Mode:

• b0-01 = 0 (Open-loop vector control)

Motor Auto Tuning:

• If the Motor can be disconnected from the load: Set d0-30 = 12 (dynamic no-load auto tuning), press RUN and wait for about 20s to complete the auto tuning process.
• If the Motor cannot be disconnected from the load: Set d0-30 = 11 (static auto tuning), press RUN and wait for about 10s to complete the auto tuning process.

If oscillation occurs during operation, the vector control parameter gain parameters (d1-01 ~ d1-05) can be adjusted (for parameter descriptions, please refer to the EM15 series manual). Increase Proportional Gain and decrease Integral Time to increase the gain. The acceleration and deceleration time b0-21 and b0-22 can also be adjusted (generally does not need to be adjusted).

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In some instances it might be required to have various predefined speed selections for a drive using a manual Position Selector (Multi-Step) Switch. This can be achieved by using an external Position Selector (Multi-Step) Switch connected to the drive’s Multi-Function Terminals and programming the Multi-Function References accordingly.

Consider a scenario using a 3-stage switch as per the example below, where the switch selections should reflect speeds of 50% (25Hz), 70% (35Hz) and 100% (50Hz) of the Max speed (50Hz). To achieve this the switch needs to be connected to the Digital Input Terminals of the Drive. Since the Switch selection Option 0 (K2) is always off (only K1 and K2 switches On/Off), only Option 1 (K1) and Option 2 (K2) needs to be connected. In the example below K1 is connected to DI3 and K2 connected to DI4 (thus requiring setting parameters b3-02 and b3-03 accordingly). Based on the Switch Options table below these options thus reflect Multi-Function References 1, 0 and 2 in the below table (thus requiring setting parameters C1-01, C1-00 and C1-02 as a percentage of b0-13). To ensure the Drive acknowledges this setup as the Speed Reference Point for the Drive, also set b0-03 = 6 (Multi-Function). In summary, the following parameters needs to be set:

• b0-03 = 6 (To set Speed Reference as the Multi-Functions)
• b3-02 = 6 (To set DI3 Terminal as Multi-Function Terminal 1)
• b3-03 = 7 (To set DI4 Terminal as Multi-Function Terminal 2)
• C1-01 = User Defined Value (to set Reference 1 speed value as a percentage of b0-13)
• C1-00 = User Defined Value (to set Reference 0 speed value as a percentage of b0-13)
• C1-02 = User Defined Value (to set Reference 2 speed value as a percentage of b0-13)
• b0-13 = User Defined Value (max speed default = 50Hz)

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To Reset a VSD to its factory settings, set A0-09 equal to one of the following values (depending on the requirement):

• A0-09 = 1(This will restore Default Settings except: Motor Parameters, Frequency Command Resolution / Frequency Unit (b0-11), Fault Records, Accumulative Power-On time (b9-08), Accumulative Running Time (b9-09), and Accumulative Power Consumption (b9-10)).
• A0-09 = 4 (This will restore Device Records which includes the Fault Records, Accumulative Power-On time (b9-08), Accumulative Running Time (b9-09), and Accumulative Power Consumption (b9-10) which is not reset if A0-09 is set equal to 1).
• A0-09 = 2 (This will restore all Device Records and all Default Settings – including the Motor Parameters which is not reset if A0-09 is set equal to 1).

To Backup or Restore parameter settings, set A0-11 equal to one of the following values (depending on the requirement):

• A0-11 = 1 (This will make a backup of the Motor Parameters to the Keypad memory which can then be restored again if needed).
• A0-11 = 2 (This will restore a previous backup of the Motor Parameters which has been made to the Keypad).

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EMHEATER VSDs offer 2 forms of locking as follows:

1. Parameter Locking: This method is mostly used to prevent users from accidently modifying any of the parameter settings. This can be done by setting A0-07 = 1 (Not Modifiable). All parameters are then read-only, and to modify any of the parameters, first set A0-07 = 0 (Modifiable).
2. Inverter Locking: This method is used to prevent users from modifying any of the parameter settings by using a Password as protection. This is done by setting A0-00 equal to a non-zero value (the value/code is the user password). The password takes effect immediately after updating A0-00. When the “PRG” key is pressed, the keypad will display “——”, and the password must be entered to unlock the VSD again. To cancel the password protection function, enter with password and set A0-00 to 0.

* Note that the Inverter Locking method can be used to prevent all use of the VSD after a set runtime. This can be done as follows:

• • • Check the VSD present running time: See b9-09 value.
    • Set the lock running time b2-21 = to the runtime limit + the value as noted for b9-09.
    • Set the password using A0-00.

* After reaching the new runtime (b2-21), the VSD will lock itself and the Keypad panel will show Err26. This can then only be resolved using the password to unlock the VSD and changing the runtime limit. To keep the VSD locked without a runtime limit, ensure b2-21 = 0.

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When setting up a VSD for Low Current Protection (typically for Dry Run Protection for Water Pumps) a low Current Alarm (Err15) will be triggered when the specific condition occurs (please see detailed FAQ entry Here).

In some cases, however it is required to set the VSD to automatically restart again after a delay period. This requires that the VSD is set up to clear the Error to allow the Auto Restart. This can be done as follows:

Connect terminals DI1 and Common and then set:

• b0-02 = 1 (terminal control)
• bb-09 = 20 (unlimited fault auto reset times)
• bb-11 = 100s (time interval of reset times)
• b1-07 = 1 (free stop mode)
• b3-15 = 3000s (DI1 On Delay time to delay the Start-up Process)

Using the above settings will clear the Error after 100 seconds (longest delay possible for clearing the Error) and then allow the VSD to start again after 3000 seconds (longest delay possible for the DI terminal).

The issue with the 3000 second delay on the DI terminal however is that the delay will always be applicable, so the VSD will always only start after 3000 seconds after switching it on. Further to this, in many cases a max of 3000 seconds delay is too short. Another shortcoming is that this method clears all faults, and not just the Low Current Error.

Another way to implement such a delay (instead of delaying the DI terminal) would be to use an external timer which gets triggered by the VSD Low Current Error (and thus ignores all other errors). Once the timer is triggered by the VSD to start, the timer will, after a set delay period, send a signal to the VSD to clear the error (this will clear all errors, but the timer is only triggered to start based on the Low Current Error occurring).

The following example explains how to do this using a Velleman VM206 Universal timer module (with USB interface). Please see the Velleman page for more information here (manual and software can be downloaded from this page as well).

Programming the Velleman VM206 Timer

Firstly, install the Velleman VM206 Software to a PC and then connect the Velleman VM206 to the PC using the supplied USB cable. Once connection between the PC and Timer has been established, the timer settings can be specified and sent to the timer using the “Send” command. For the purpose of this specific example, the Timer Mode = 10 should be used with two Time Sequences as follows (please see image that follows as example):

• t1: Relay = Off; Time = Set time depending on how long the timer should wait before sending a signal to clear the VSD error state (10 seconds in this example).
• t2: Relay= On; Time = Set time for how long the timer should send the signal to clear the VSD error state (1 second in this example).
• Do not select any of the Tick boxes for the 3 options at the bottom

Wiring the Velleman VM206 Timer and VSD

To provide power to the timer, connect the VSD 10+V terminal with the Timer + terminal and the VSD GND terminal with the Timer – terminal.

To receive the trigger from the VSD when the Low Current Protection Error occurs, connect the VSD Relay terminal TA with the Timer IN1 terminal and the VSD relay terminal TC with the Timer GND terminal.

To send the trigger from the Timer after the set delay time to clear the error on the VSD, connect the VSD terminal DI3 with the Timer COM terminal and the VSD COM terminal with the Timer NO terminal.

VSD Wiring and Parameter Settings

Set the VSD for Low Current Protection (typically for Dry Run Protection for Water Pumps) a low Current Alarm (Err15) will be triggered when the specific condition occurs (please see detailed FAQ entre here).

Set the VSD Relay Output to start the Timer once the Low Current Error occurs as follows:

• b4-03 = 26 (Zero Current State) – this will switch the relay once the Low Current Error Occur.
• b4-15 = 1 (Relay 2 Off Delay Time) – this is a slight delay on the switch to prevent conflict with the Dry Run Protection Settings which causes the Relay to immediately switch back again.

Please Note: For Smaller Drives with only one set of Relays (TA-TB-TC), use the TA2-TB2-TC2 Relay parameter settings.

Set the VSD Digital Input to clear its error state once it receives a trigger from the Timer as follows:

• b3-02 = 37 (Fault Reset) – this will clear the VSD error state.

Then, since the VSD needs to auto start after resetting the error via the timer, the VSD needs to be set up to auto start. To do this, connect DI1 and COM (ideally add a manual switch between DI1 and COM to force switch the VSD off). Set b0-02 = 1 (Terminal Control). This will ensure that as long as the VSD is not in an error state it will run (if a manual switch is connected between DI1 and COM the switch needs to be on).

Wiring Diagram

For scenarios where this setup might be applicable, please see:

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using the VSD Parameters to set a Fixed Target Pressure, please see the relevant FAQ entry here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external analog signal (such as a PLC) to modify the target pressure (Variable Target Pressure), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter to provide Constant Water Pressure using an external Multi-Stage Switch to modify the target pressure (Target Pressure Selector), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Outflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with a Pressure Transmitter for Frequency Control using a PID (Manage Water Inflow), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD with AI Input Overrun Limit (using a Pressure Transmitter as STOP), please see the relevant FAQ entry Here.

For additional Protection Features, please also see:

– To set up a EMHEATER VSD End of Curve Parameters (PID Signal Loss Protection), please see the relevant FAQ entry Here.

– To set up a EMHEATER VSD Low Current Protection (Dry Run Protection), please see the relevant FAQ entry Here.

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The default parameter display for Double Line Keypads (EM15 VSDs and Solar Drives) can be changed as follows:

Top Keypad Line:

To change the Display for the top line set parameter b9-11 using the desired value (Please see FAQ Entry HERE for values).

Bottom Keypad Line:

To change the Display for the bottom line use the Shift Key (double right arrow) on the Keypad to scroll through all the parameters. The last parameter on display will be kept as the default display. When the frequency inverter is powered on again after a power failure, the parameter as recorded before the power failure will be displayed.

Whether parameters are displayed on the Bottom Keypad Line when scrolling using the Shift Key is determined by setting the following parameters:

Parameters Displayed while in Run Status:

• b9-02 (Running Status Parameter Set 1)
• b9-03 (Running Status Parameter Set 2)

These two parameter sets are used to set the 32 monitoring parameters that can be viewed when the VSD is in the running state. If a parameter needs to be displayed during the running status, set the corresponding bit to 1. The displaying sequence is based on the combined list of parameters starting with the b9-02 monitoring parameters up until the last monitoring parameter of b9-03.

Parameters Displayed while in Stop Status:

• b9-04 (Stop Status Parameter Set)

This parameter set is used to set the 16 monitoring parameters that can be viewed when the VSD is in the stop state. If a parameter needs to be displayed during the stop status, set the corresponding bit to 1.

The above 3 parameters are set in hexadecimal format, and thus needs to be converted using their binary values. Please see options listed below:

Converting from Binary to Hexadecimal Values:

Hexadecimal, also known as hex, uses 16 units, numerical numbers 0-9 and the letters A, B, C, D, E and F. To convert from Binary to Hexadecimal, do the following:

1. Start at the rightmost digit and break the binary number up into groups of four digits. These are known as nibbles.
2. Convert each group of four digits into a decimal value.
3. Convert each decimal value into its hex equivalent.
4. Put the hex digits together.

Example: To set b9-02 to display parameters 0, 1, 2, 3, 4 and 5, the following Binary values are used -> 0000000000011111. Starting from the right, each group of Binary values can be converted to Decimal and then to Hex as follows:

• 1111 (Binary) = 15 (Decimal) = F (Hex)
• 0001 (Binary) = 1 (Decimal) = 1 (Hex)
• 0000 (Binary) = 0 (Decimal) = 0 (Hex)
• 0000 (Binary) = 0 (Decimal) = 0 (Hex)

Thus, set b9-02 = 001F

Converting from Hexadecimal to Binary Values:

1. Split the Hex number into individual values.
2. Convert each Hex value into its Decimal equivalent.
3. Convert each Decimal digit into Binary (making sure to write four digits for each value).
4. Combine all four digits to make one binary number.

Example: Convert Hex FC to Binary:

• F = decimal 15
• C = decimal 12
• 15 = binary 1111
• 12 = binary 1100

Result – 11111100

* Excel Document to specify display parameters and generate the relevant HEX value available here.

* Note that the following parameters listed in the images are not relevant: Linear Speed, Count Value, Length Value and Received. Also note that the Load Speed is the same as U0-14.

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To autotune a VSD for a specific motor:

• First make sure that all Motor Parameters has been set (d0-00 up to d0-04) then:
• Set d0-30 = 3 and press ENTER
• Press RUN to start the autotuning process.

The VSD and Motor will go through a short working process and stop by itself, after which the d0-05 up to d0-09 parameters would have been optimised.

d0-05: Stator resistance (asynchronous motor)
d0-06: Rotor resistance (asynchronous motor)
d0-07: Leakage inductive reactance (asynchronous motor)
d0-08: Mutual inductive reactance (asynchronous motor)
d0-09: No-load current (asynchronous motor)

PLEASE NOTE: Autotuning cannot be done when the drive is in Terminal Control or Remote Control Mode (needs to be in keypad Control mode: b0-02=0). After setting the Autotune Parameter the keypad will display “TUNE”, when this is displayed press the RUN button and let the drive complete the autotuning process (~30 seconds) after which the drive can be used.

*When using a single VSD to run more than one motor, do not perform autotuning.

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