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Omron CP1H & DELTA VFD-M “Modbus-RTU” Tutorial

Written by plc247.com

Hello!

The Omron CP1H PLC and Delta VFD-M Inverter are devices that are widely used in small machines and transmission lines. Today plc247.com will guide you to connect them together via Modbus-RTU Communication Standard (RS485)

Because the article is quite long, you should pay attention to read each step in detail and do not skip steps 😀

PLC CP1H and Delta VFD-M Wiring Diagram

Setting the parameters of the VFD-M inverter

You make settings with basic communication parameters including Pr00, Pr01, Pr88, Pr89, Pr92, Pr157

+ Pr00: 03 – Set Frequency by RS485 . Port

+ Pr01: 04 – Start/Stop control by RS485 . port

+ Pr088: 01 – Modbus Slave No.1

+ Pr089: 01– Baud Rate 9600

+ Pr092: 04 – MODBUS RTU Mode ( Even, 8bit, Stop bit =1 )

+ Pr157: 01 – Modbus Mode Selection

Modbus Address List

Controllable addresses

Addresses used in the project:

  • 2000H (Coltrol Run): Forward Run ( 0000.0000.0001.0010 = 18 Dec ), Reserved Run ( 0000.0000.0010.0010 = 34 Dec ), Stop ( 0000.0000.0000.0001 = 1 Dec )
  • 2001H ( Frequency Setting)

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Status Monitor (Only Read)

We read the following 3 main parameters:

  • 2103H – Output Frequency
  • 2104H – Output Current
  • 2106H – Voltage

Omron CP1H . PLC Communication Configuration

Sample Program (Successfully Run)

+ Distribute Write/Read Data

+ Control Run & Running frequency setting

+ Frequency write command from PLC to VFD

+ Start/Stop Motor control and Direction of rotation

+ Distribute read 3 Data

+ Command Read Data

+ Receive Data on successful reading

Detailed Instruction Video

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+ Delta VFD-M Document >>> Download Here

So I have finished guiding you how to connect Omron CP1H & Delta VFD-M. If you have any questions, please comment below the article.

Thanks and Best Regards!

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