How to use Simple PLC function?
Introduction
What is simple PLC function? This is also commonly referred to as built-in logic control / built-in sequence control function, meaning:
The VFD can perform some simple logic control and sequential operations without the need for an external PLC.
Different manufacturers use different names, and may also refer to it as "simple PLC," "built-in PLC," "sequence control," or "STEP control," etc.
Operation
The implementation of the simplified PLC differs between our VNZ100 and other inverter models.
Step1: To use the function, you must first select "simple PLC" in the frequency source settings. For VB, VC, VM, need to set F0.03 to 7, for VNZ200, need to set , for VNZ100 need to set F101 to 7.
Step2(for VB, VM, VC): The speed segments can be configured in the FD group, you can click the link below for more details about the parameter.
If you don't need to use so many segments. Just set the other segment running time to 0.
Step2(for VNZ200):
Step2(for VNZ100):
Example
The motor runs forward at 50Hz for 40 second, then stops and runs reverse at 50Hz for 40 second.
For VNZ100: Set P501=1, P502=2, P503=50, P504=50, P518=40, P519=40, P533=2
For VNZ200:
For VB, VM, VC: