PLC Omron “Modbus RTU” LS iG5A VFD Tutorial

In the previous article, I showed you how to connect the LS iG5A inverter to Mitsubishi PLC and Weintek HMI using Modbus-RTU communication.

• PLC Keyence” Modbus-RTU” LS iG5A Tutorial
• Omron CP1H “Modbus RTU” Yaskawa-V1000 VFD

Today I would like to continue to guide you to use Omron PLC (CP1H combined with CP1W-CIF11 or CP1W-CIF12) to control the inverter LS iG5A

Connection diagram Modbus-RTU CP1H & iG5A VFD

LS iG5A Modbus Communication Configuration

Table of communication parameters iG5A

You install as follows:

• Drv = 3
• Frq = 7
• I59 = 0
• I60 = 1
• I61 = 3
• I62 = 0
• I65 = 2

Modbus RTU Address Table

Note: PLC Register Address = “Address – 1”

We use the following key parameters:

Controllable Register:

+ Frequency Reference: 0005 – 1 = 4 (hex)

+ Run Command: 0006 – 1 = 5 (hex)

• Set 5 (hex) = 2 > Forward run
• Set 5 (hex) = 4 > Reverse run
• Set 5 (hex) = 0 > Stop

Data Reponse Register:

+ Output Current: 0009 – 1 = 8 (hex)

+ Output Frequency: 000A – 1 = 9 (hex)

+ Output Voltage: 000B -1 = A (hex)

CP1H Communication Configuration

I uses Port.2 of CP1H, so the configuration is as follows (Port.1 is similar)

CP1H PLC Programming

+ Write/Read Control

+ Frequency Write

+ Motor Control Run

+ Read Data Selection

+ Read Data Command

+ Read Data Reponse

Detailed Connection Instruction Video

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Documents related to the project

+ Omron PLC CP1H Manual PDF

+ LS iG5A VFD Manual PDF Download (Password: plc247.com)

Thanks and Regards!