Omron’s CP1H PLC and DELTA MS300 inverter are industrial devices commonly used in small and mid-sized machines. Today plc247.com will guide you to connect them via Modbus RTU.
To have RS485 port, I used Module CP1W-CIF12 (or CP1W-CIF11) to connect to PLC CP1H.
CP1H & DELTA MS300 “Connection Diagram”
MS300 VFD Communication Setting
In order for Delta inverter to communicate with Modbus-RTU, we need to set the following parameters:
+ P00.20: 1 (Setting Frequency via Modbus)
+ P00.21: 2 (Control Motor via Modbus)
+ P09.00: 1 (Address 1)
+ P09.01: 9.6 (9600bps)
+ P09.02: 0
+ P09.03: 1.0 (Time Err Detect)
+ P09.04: 14 (Modbus_RTU 8/1/Even)
Register for Control Address
>>> Control Address = 2000 (Hexa)
+ Set 2000 (Hex) = 18 (dec) >>> Run Forward
+ Set 2000 (Hex) = 34 (dec) >>> Run Reverse
+ Set 2000 (Hex) = 1 >>> Stop Run
>>> Set Frequency Address = 2001 (Hexa)
Register for Monitoring
>>> Output Frequency Address = 2103 (Hex)
>>> Output Current Address = 2104 (Hex)
>>> Output Voltage Address = 2106 (Hex)
Omron CP1H Modbus-RTU Configuration
Configure RS485 port with the same communication parameters as MS300
PLC Programming
+ Reset Data when Start
+ Automatic Read/Write Command
+ Frequency Write Command
+ Motor Control Command
+ Data Monitoring Command
Data Response
Detailed Instruction Video
Below is a video on how to install MS300 inverter parameters and test the program
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Software & Documention Requirements
+ CX-Programmer for CP1H Programming
+ Download DELTA MS300 VFD Manual PDF
Password Extract: plc247.com
If you have any questions about connecting CP1H to DELTA MS300, please comment below the article.
Best Regards!
