Mitsubishi Electric QJ71MT91 User Manual

MODBUS/TCP Interface Module User's Manual
-QJ71MT91
-GX Configurator-MB (SW1D5C-QMBU-E)

Mitsubishi Electric QJ71MT91 Specifications

General

Model	QJ71MT91
Series	Q Series
Number of Ports	1
Number of connectable stations	32
Transmission Speed	10/100 Mbps
Conforms to Modbus TCP	Yes
Power Supply	24 VDC
Weight	0.2 kg
Compatibility	Q series
Communication Protocol	Ethernet
Interface	Ethernet

Summary

SAFETY PRECAUTIONS

Design Precautions

Precautions for designing safe systems and preventing malfunctions.

Installation Precautions

Guidelines for safely installing hardware modules to prevent damage or hazards.

Wiring Precautions

Safety measures and best practices for electrical wiring to prevent shocks or damage.

Setup and Maintenance Precautions

Precautions for setting up and maintaining the module to ensure safety and reliability.

Operating Precautions

Guidelines for safe operation of the module to prevent damage, accidents, or fire.

2 SYSTEM CONFIGURATION

2.1 Applicable Systems

2.2 Devices Necessary for Network Configuration

2.3 System Configuration and Access Range

2.4 Precautions for System Configuration

3 SPECIFICATIONS

3.1 Performance Specifications

Detailed performance specifications of the QJ71MT91 module, including transmission rates and connection limits.

3.2 I/O Signals for Programmable Controller CPU

3.3 Applications and Assignment of Buffer Memory

4 MODBUS STANDARD FUNCTIONS

4.1 MODBUS Standard Function Support List

A list of standard MODBUS functions supported by the QJ71MT91, categorized by master and slave functions.

5 FUNCTIONS

5.2 Master Function

Explanation of the QJ71MT91's capabilities when acting as a master in MODBUS/TCP communication.

5.3 Slave Function

Explanation of the QJ71MT91's capabilities when acting as a slave in MODBUS/TCP communication.

5.4 KeepAlive Function

6 PRE-OPERATIONAL PROCEDURES AND SETTING

6.1 Handling Precautions

6.2 Pre-Operational Procedures and Setting

6.4 Connection to Ethernet

6.6 Intelligent Function Module Switch Setting

Detailed guide on configuring the intelligent function module switches for operation mode, communication settings, and IP addresses.

7 PARAMETER SETTING

7.1 Parameter Settings and Setting Procedure

Overview of parameter types and methods for setting parameters on the QJ71MT91 module.

7.2 Basic Parameters

Detailed configuration of basic parameters, including TCP/UDP/IP settings, routing, and GX Developer connection.

7.3 Automatic Communication Parameters

Settings for the automatic communication function, including target station IP, module ID, and timers.

7.4 MODBUS Device Assignment Parameters

Configuration for mapping MODBUS devices to programmable controller CPU memory or buffer memory.

8 UTILITY PACKAGE (GX Configurator-MB)

8.1 Functions of the Utility Package

8.4 Initial Setting

Guide to setting initial parameters using the utility package, bypassing the need for sequence programs.

8.6 Monitor/Test

Procedures for monitoring module status, I/O signals, and performing tests like PING test using the utility.

9 PROGRAMMING

9.1 Parameter Setting

9.2 Program Example for Normal System Configuration

9.3 Program Example for Use in MELSECNET/H Remote I/O Network

10 DEDICATED INSTRUCTIONS

10.1 Dedicated Instruction List and Available Devices

10.2 Z(P).MBRW

10.3 Z(P).MBREQ

11 TROUBLESHOOTING

11.1 Troubleshooting

11.2 Confirming QJ71MT91 Status

11.3 Error Codes

11.4 Turning Off the COM. ERR. LED

11.5 Conducting PING Test to Check QJ71MT91 Connection