In previous posts, plc247.com guided you through the basic installation and use of some PLC/HMI to control the PowerFlex525 Inverter.
Today I would like to continue to write a tutorial for you to use a very cheap but high quality PLC that is the DELTA DVP14SS2 PLC to control the PowerFlex525 inverter via the Modbus-RTU RS485 Communication Standard.
DVP-14SS2 & PowerFlex 525 “Wiring Diagram”
PowerFlex 525 Modbus-RTU Parameters Setting
In addition to the basic parameters of the inverter installed according to the motor (Frequency, Voltage, Current), we need to set the communication parameters as follows:
Register Control Address
>>> Motor Control Address = 2000 (Hex)
+ Set Word 2000 = 18 >>> Forward Run
= 34 >>> Reverse Run
= 1 >>> Stop
= 8 >>> VFD Fault Reset
>>> Motor Frequency Address = 2001 (Hex)
Register Monitoring Address
PLC Delta DVP-14SS2 Modbus-RTU Configuration
We need to configure the communication parameters of the PLC to be the same as that of the Inverter
PLC DVP14SS2 Programming
+ Modbus RTU Setting
+ Distribution Transmission
+ Setting Frequency & Motor Control Run
+ Data Response Read
Recommended software and documentation:
+ PowerFlex 525 VFD Manual PDF (Password Extract: plc247.com)
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