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Mitsubishi QJ71C24N “Modbus RTU” Yaskawa V1000 Tutorial

Written by plc247.com

Hello friends!
Continuing the series of articles using Mitsubishi Q-Series PLC combined with QJ71C24N Module to control different inverters via Modbus-RTU protocol, today plc247.com will continue to guide you to control Yaskawa V1000 inverters.

plc247.com will guide you to use QJ71C24N to control Yaskawa V1000 in the most detail and easy to understand, you should read carefully step by step to be able to implement this project.

QJ71C24N & Yaskawa V1000 “Connection Diagram”

Yaskawa V1000 inverter has a built-in RS485 communication port, so we will connect the QJ71C24N to the inverter according to the diagram below:

Yaskawa V1000 “Modbus RTU” Parameters Setting

To be able to control Yaskawa V1000 inverter using Modbus RTU communication protocol, we need to configure the following parameters:

Yaskawa V1000 Modbus Registers Address

+ VFD Control Address = 1 (hex)

  • Set Word “1” = 0000 0000 0000 0001 (Bin) = 1 >>> Forward Run
  • Set Word “1” = 0000 0000 0000 0010 (Bin) = 2 >>> Reverse Run
  • Set Word “1” = 0000 0000 0000 0000 (Bin) = 0 >>> Stop

+ Set Frequency Address = 2 (hex)

+ Output Frequency Address = 24 (hex)
+ Output Voltage Address = 25 (hex)
+ Output Current Address = 26 (hex)

Mitsubishi QJ71C24N “Modbus RTU” Configuration

Here are the steps to install the QJ71C24N module in detail:

+ Step 1: Create New Project

+ Step 2: In/Out Assigment

+ Step 3: QJ71C24N Parameters Setting

+ Step 4: Write Parameters to QJ71C24N Module

+ Step 5: Echoback Disable

  • Echoback refers to the function in which data transmitted by RS-485 (2-wire) is returned about the local station’s RDA and RDB.
  • Echoback refers to the function in which data transmitted by RS-485 (2 wires) is returned about the local station’s RDA and RDB.
  • Set G450 = 1 (Disable Echoback) / = 0 (Enable Echoback)
QJ71C24N & Yaskawa V1000 “Protocol Configuration”

+ Go to “Serial Communication Module…” settings

+ Add Protocol, Read Protocol from PLC, Write Protocol to PLC

+ Protocol No.1: “Func = 06 / Write Single Registers”

  • Slave Address = “D100”
  • Register Adress = “D101”
  • Register Value = “D110”
  • “Comm. Error” = “D300”

+ Protocol No.2: “Func = 03 / Read Holding Registers”

  • Slave Address = “D200”
  • Starting Address = “D201”
  • Quantity of Registers = “D202”
  • Registers Value Response = “D210” (From D210…D335 depending on the number of Registers (D202) to read)
  • “Comm. Error” = “D300”

Important: Need to set “Receive Wait Time”, if Set = 0, error communication will be “Infinite Wait”

PLC Programming

+ “Echo back” Disable & Error Clear

+ Communication Distribution

+ Frequency Setting Command

+ VFD Control Command

+ Data Monitoring

+ HMI Interface

Project Video Tutorial

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References
+ Download Mitsubishi GX-Works 2 Software
+ Weintek HMI & Q03UDV “Connection Tutorial”
+ Download Yaskawa V1000 Manual PDF

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