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MicroLogix 1400 “Servo Control” MR-J4 Mitsubishi Tutorial

Hello everyone!
In the previous post, showed you how to use the Allen Bradley MicroLogix 1400 PLC to control Stepping Motor and Servo Motor. Today I will continue to guide you to use MicroLogix 1400 to control MR J4 Servo Motor

In Project use PLC MicroLogix 1400 Model 1766-L32BXB (or 1766-L32BXBA is ok) and Servo Driver Mitsubishi MR-J4-A (Analog/Pulse Train)

MicroLogix 1400 & Mitsubishi MR J4 “Wiring Diagram”

  • R= 2K2(Ω): Reduce voltage from 24VDC to 5VDC
  • DM542 Setting 1000PLS = 1 Revolution

+ OUT2: Pulse Pin

+ OUT3: Direction Pin

+ OUT4: Servo ON/OFF Control

Mitsubishi MR J4 A Servo Driver Configuration

Here are the main parameters of the Mitsubishi MR J4 A that we need to install (Using MR-Configuration 2 Software, download link at the bottom of the article)

+ PA1: Servo control mode selection > Set to “1000” to select the position control mode.

+ PA6/7: CMX/CDV: Input pulse gain ratio. Used to correct the change of the number of pulses / revolutions when issuing a command from the PLC to the Servo. The default is 1/1, which corresponds to 131072 pulses / revolution

+ PA13.PLSS: Selection of control pulse types: Default is 0100, change the following two factors to select pulse input type. Please see the table below to choose the appropriate control method:

You can Copy the same parameters as Project as below

MicroLogix 1400 “Possition Control” Settings

+ Note: Default “OUT-Output” parameter setting “-1”, we need to change it to 2,3,4 (Corresponding Output 2,3,4) otherwise PLC will report an error!

+ In this project uses OUT2 as a pulse generator >>> OUT – Output = “2”

PLC Programming

+ Servo Jog & ON/OFF Control

+ Servo Position Control

Project Video Tutorial


Software to support parameter setting Servo

>>> Download MR Configurator 2 for Mitsubishi Servo Setting

Password Extract:

If you have any questions in the process of using MicroLogix 1400 PLC to control Mitsubishi MR J4 Servo Motor, please comment below the article, will answer you as soon as I read the comment.

Best Regards!

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