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).
