In the previous article, plc247.com showed you how to control the DELTA VFD-M inverter with different HMIs and PLCs, you can see the article at the link below.
Today I would like to continue to guide you to use PLC Keyence (KV5500 + Module KV-L21V) to control VFD-M inverter via Modbus
Connection Diagram
VFD-M Inverter Communication Configuration
In addition to the basic inverter setting parameters, we need to set the communication parameters as follows:
- Pr00: 03 – Set Frequency by RS485
- Pr01: 04 – Start/Stop control by RS485
- Pr088: 01 – Modbus Slave Station #1
- Pr089: 01– Baud Rate 9600bps
- Pr092: 04 – MODBUS RTU ( E, 8,1 )
- Pr157: 01 – Modbus Mode
Modbus Address List
Addresses to receive write commands from PLC
+ Start/Stop control register: 2000H >>> Set Value folow to below:
- Run Forward (FWD): = 18 (0000.0000.0001.0010)
- Run Reserved (REV): = 34 (0000.0000.0010.0010)
- Stop: = 1 (0000.0000.0000.0001)
+ Frequency Setting: 2001H
======
Monitor Status signal read registers
In the project I read 4 values:
- 2103H: Output Frequency
- 2104H: Output Current
- 2105H: DC-BUS Voltage
- 2106H: Output Voltage
Keyence KV-L21V Communication Configuration
PLC Programming
Reset data when starting PLC
Communication Distribution
Frequency Setting Write
Inverter Control Start/Stop
Command to read Status Monitor
Save Read Data ( Save Error Code if have Issue)
Detailed Instruction Video
=====
DELTA VFD-M Inverter User Manual >>> Download Here
If you have any problems during the implementation of this project, please comment below the article, plc247.com will answer you as soon as I read it.
Best Regards!
