Contents

SAFETY PRECAUTIONS
CONDITIONS OF USE FOR THE PRODUCT
INTRODUCTION
COMPLIANCE WITH THE EMC AND LOW VOLTAGE DIRECTIVES
RELEVANT MANUALS
CONTENTS
MANUAL PAGE ORGANIZATION
TERM
PACKING LIST
CHAPTER 1 FEATURES
CHAPTER 2 PART NAMES
CHAPTER 3 SPECIFICATIONS
- 3.1 General Specifications
- 3.2 Performance Specifications
- 3.3 Function List
  - 3.3.1 Function list
  - 3.3.2 Use with other functions
- 3.4 List of I/O Signals
- 3.5 Buffer Memory
  - 3.5.1 Configuration of the buffer memory
  - 3.5.2 List of buffer memory addresses
CHAPTER 4 PROCEDURES BEFORE OPERATION
CHAPTER 5 SYSTEM CONFIGURATION
- 5.1 Configuration of an E71-mounted System
  - 5.1.1 Applicable modules and base units, and the number of connectable modules
  - 5.1.2 For use with a Basic model QCPU or safety CPU
  - 5.1.3 For use in a multiple CPU system
  - 5.1.4 For use in a redundant system
  - 5.1.5 For use in a MELSECNET/H remote I/O station
- 5.2 Network Components
  - 5.2.1 Configuration devices used for 100BASE-TX/10BASE-T connection
  - 5.2.2 Configuration devices used for 10BASE5 connection
  - 5.2.3 Configuration devices used for 10BASE2 connection
CHAPTER 6 INSTALLATION AND WIRING
- 6.1 Installation
- 6.2 Wiring
  - 6.2.1 Wiring with the QJ71E71-100
  - 6.2.2 Wiring with the QJ71E71-B5
  - 6.2.3 Wiring with the QJ71E71-B2
CHAPTER 7 COMMUNICATION PROCEDURE
- 7.1 Setting Parameters Required for Communications
  - 7.1.1 Parameter list
  - 7.1.2 Basic setting
  - 7.1.3 Ethernet Operation Setting
  - 7.1.4 Open Setting
- 7.2 TCP/IP Communications
  - 7.2.1 Establishing a connection
  - 7.2.2 Communication process
  - 7.2.3 Active open procedure
  - 7.2.4 Passive open procedure
- 7.3 UDP/IP Communications
  - 7.3.1 Communication process
  - 7.3.2 Open procedure
CHAPTER 8 CONNECTING MELSOFT PRODUCTS AND A GOT
- 8.1 Applications
- 8.2 Data Communication Procedure
CHAPTER 9 MC PROTOCOL COMMUNICATIONS
- 9.1 Applications
- 9.2 Communication Structure
- 9.3 Data Communication Procedure
- 9.4 Parameter Setting
CHAPTER 10 SLMP COMMUNICATIONS
- 10.1 Applications
- 10.2 Communication Structure
- 10.3 Data Communication Procedure
- 10.4 Parameter Setting
- 10.5 Available command list
CHAPTER 11 DATA COMMUNICATIONS USING THE PREDEFINED PROTOCOL
- 11.1 Data Communication Procedure
- 11.2 Communication Type of Protocols
- 11.3 Packet Elements
- 11.4 Execution Condition of Predefined Protocol Communication
- 11.5 Example of Predefined Protocol Communications
  - 11.5.1 System configuration example
  - 11.5.2 Parameter Setting
  - 11.5.3 Program example
CHAPTER 12 COMMUNICATIONS USING A FIXED BUFFER
- 12.1 Applications
  - 12.1.1 Differences between the "Procedure Exist" and "No Procedure" control methods
- 12.2 Communication Structure
- 12.3 Data Sending Procedure
- 12.4 Data Receiving Procedure
  - 12.4.1 Data receiving using the main program (BUFRCV instruction)
  - 12.4.2 Data receiving using an interrupt program (BUFRCVS instruction)
- 12.5 Parameter Setting
  - 12.5.1 Parameter setting when using an interrupt program
- 12.6 Data Format
  - 12.6.1 Header
  - 12.6.2 Application data
- 12.7 Pairing Open
  - 12.7.1 Applications
  - 12.7.2 Parameter setting
- 12.8 Broadcast Communications
  - 12.8.1 Sending/receiving procedures
  - 12.8.2 Parameter setting
  - 12.8.3 Precautions
- 12.9 Example of Communications Using a Fixed Buffer
  - 12.9.1 System configuration
  - 12.9.2 Parameter setting
  - 12.9.3 Program
CHAPTER 13 COMMUNICATIONS USING A RANDOM ACCESS BUFFER
- 13.1 Applications
- 13.2 Communication Structure
  - 13.2.1 How data is read from a connected device
  - 13.2.2 How a connected device writes data
- 13.3 Parameter Setting
- 13.4 Data Format
  - 13.4.1 Header
  - 13.4.2 Application data
  - 13.4.3 Examples of command and response formats
- 13.5 Precautions when Creating Programs
- 13.6 Physical and Logical Addresses of a Random Access Buffer
- 13.7 Example of Communications Using a Random Access Buffer
CHAPTER 14 OTHER FUNCTIONS
- 14.1 Router Relay Function
  - 14.1.1 Applications
  - 14.1.2 Parameter settings
- 14.2 Communications Using an Auto-open UDP Port
  - 14.2.1 Application
- 14.3 IP Filter Function
  - 14.3.1 Application
  - 14.3.2 Setting method
  - 14.3.3 Program example
  - 14.3.4 Precautions
- 14.4 Remote Password
  - 14.4.1 Application
  - 14.4.2 Remote password setting processes (unlock and lock processes)
  - 14.4.3 Remote password check procedure
  - 14.4.4 Comparison of functions according to the remote password check status (enabled/disabled)
  - 14.4.5 Precautions
  - 14.4.6 Parameter settings
- 14.5 Hub Connection Status Monitor Function
- 14.6 IP Address in Use Detection Function
- 14.7 Redundant System Function
  - 14.7.1 System switching request to the control system CPU module
  - 14.7.2 Communication path bypass function
  - 14.7.3 Parameter settings
  - 14.7.4 Data communications in a redundant system
- 14.8 Alive Check Function
CHAPTER 15 DEDICATED INSTRUCTIONS
- 15.1 List of Dedicated Instructions
- 15.2 Parameter Settings for Using Dedicated Instructions
  - 15.2.1 When using data link instructions
- 15.3 Precautions for Dedicated Instructions
- 15.4 Organization of the Dedicated Instruction Sections
- 15.5 ZP.OPEN
- 15.6 ZP.CLOSE
- 15.7 GP.ECPRTCL
- 15.8 ZP.BUFSND
- 15.9 ZP.BUFRCV
- 15.10 Z.BUFRCVS
- 15.11 ZP.ERRCLR
- 15.12 ZP.ERRRD
- 15.13 ZP.UINI
CHAPTER 16 TROUBLESHOOTING
- 16.1 Before Troubleshooting
- 16.2 Troubleshooting Procedure
- 16.3 Checking with the Module Error Collection Function
- 16.4 Checking the LEDs
  - 16.4.1 If the RUN LED turns off
  - 16.4.2 If the ERR. LED or COM.ERR. LED turns on
  - 16.4.3 If the SD LED does not flash when data is sent
  - 16.4.4 If data cannot be received with the RD LED off
- 16.5 Troubleshooting by Symptom
  - 16.5.1 Communications cannot be performed with the connected device.
  - 16.5.2 The E71 frequently fails to receive a message sent from the connected device.
  - 16.5.3 A dedicated instruction is not completed.
  - 16.5.4 MC protocol communications cannot be performed.
  - 16.5.5 Communications using SLMP cannot be performed.
  - 16.5.6 Communications using the predefined protocol cannot be performed.
  - 16.5.7 The protocol setting data cannot be read or written.
  - 16.5.8 Data cannot be sent with communications using a fixed buffer.
  - 16.5.9 Data cannot be received with communications using a fixed buffer.
  - 16.5.10 Communications using a random access buffer cannot be performed.
  - 16.5.11 The access cannot be allowed/denied correctly by the IP filter.
  - 16.5.12 An e-mail cannot be sent.
  - 16.5.13 An e-mail cannot be received.
  - 16.5.14 Communications using data link instructions cannot be performed.
  - 16.5.15 Communications cannot be performed during OPS connection in a redundant system.
  - 16.5.16 Systems cannot be switched in a redundant system.
- 16.6 Error Code List
  - 16.6.1 End codes returned to a connected device during data communications
  - 16.6.2 Abnormal codes returned during communications using an A-compatible 1E frame
  - 16.6.3 Error codes stored in the buffer memory
- 16.7 Ethernet Diagnostics
- 16.8 How to Turn Off the COM.ERR. LED
APPENDICES
- Appendix 1 Processing Time
- Appendix 2 Port Numbers Used for the E71
- Appendix 3 New and Improved Functions
- Appendix 4 Initial Process
  - Appendix 4.1 Setting the initial process
  - Appendix 4.2 Reinitialization process
- Appendix 5 Line Status Check
  - Appendix 5.1 PING test
  - Appendix 5.2 Loopback test
- Appendix 6 Self-Diagnostic Tests
  - Appendix 6.1 Self-loopback test
  - Appendix 6.2 Hardware test (H/W Test)
- Appendix 7 Differences from Ethernet Modules of Other Series
  - Appendix 7.1 Comparison with a Built-in Ethernet port QCPU
  - Appendix 7.2 Comparison with QnA/A Series Modules
- Appendix 8 Operation Image and Data Structure of Predefined Protocol
  - Appendix 8.1 Operation image of each communication type of protocol
  - Appendix 8.2 Verification operation of receive packet
  - Appendix 8.3 Data examples of packet elements
- Appendix 9 Usage example of MX Component
  - Appendix 9.1 How to create a program
  - Appendix 9.2 Sample Program
- Appendix 10 Sample Program on the Connected Device Side
  - Appendix 10.1 When Visual C++.NET is used (single CPU system)
  - Appendix 10.2 When Visual C++.NET is used (redundant system)
  - Appendix 10.3 When Visual Basic.NET is used
- Appendix 11 Checking the Serial Number and Function Version
  - Appendix 11.1 Compatible software versions
- Appendix 12 External Dimension Diagram
- Appendix 13 ASCII Code List
INDEX
REVISIONS
WARRANTY

Mitsubishi Electric MELSEC QJ71E71 User's Manual

Mitsubishi Electric MELSEC QJ71E71 manual cover

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Mitsubishi Electric MELSEC QJ71E71 Specification

The Mitsubishi Electric MELSEC QJ71E71 is an advanced Ethernet communication module designed for the MELSEC-Q Series PLC systems. This module facilitates seamless communication between the PLC and various networked devices, enabling efficient data exchange and control in industrial automation settings. It supports both TCP/IP and UDP/IP protocols, providing flexibility and compatibility with a wide range of Ethernet-based devices. The module features a high-speed data transfer rate of up to 100 Mbps, ensuring quick and reliable communication.

With integrated diagnostic functions, the QJ71E71 allows for easy monitoring and troubleshooting of network status, enhancing system reliability and reducing downtime. The module supports multiple communication methods, including cyclic data exchange and transient data transmission, catering to diverse application needs. Installation is straightforward, using a standard Q Series base unit, and configuration is managed through intuitive software tools, allowing for rapid integration into existing systems.

The QJ71E71 ensures robust security features, incorporating user authentication and data encryption, safeguarding sensitive information and preventing unauthorized access. Its compact design maintains the streamlined profile of the MELSEC-Q Series, conserving valuable control panel space. The module is built to withstand harsh industrial environments, with a temperature range suitable for various operating conditions. This Ethernet communication module is ideal for manufacturers looking to optimize their industrial network communications, improve system performance, and enhance overall operational efficiency.

Mitsubishi Electric MELSEC QJ71E71 F.A.Q.

What are the basic steps to configure the MELSEC QJ71E71 Ethernet module?

To configure the MELSEC QJ71E71 Ethernet module, start by setting the IP address using the rotary switches on the module. Next, use the GX Works2 software to configure the network parameters, such as subnet mask and gateway. Finally, download the configuration to the PLC.

How can I troubleshoot communication issues with the QJ71E71 module?

Check the physical connections and ensure that the Ethernet cables are properly connected. Verify that the IP address and subnet mask settings are correct. Use diagnostic tools like PING to test connectivity and review the error codes displayed on the module's LED indicators for specific issues.

What maintenance is required for the QJ71E71 module?

Regularly check the Ethernet cables for wear and ensure they are securely connected. Periodically review the configuration settings to ensure they match network changes. Keep the module's firmware updated to the latest version provided by Mitsubishi Electric.

Can the QJ71E71 module support multiple network connections simultaneously?

Yes, the QJ71E71 module can handle multiple network connections using its built-in ports and support for various communication protocols, allowing it to communicate with multiple devices on the same network.

How do I reset the QJ71E71 Ethernet module to factory settings?

To reset the QJ71E71 module, power off the PLC, hold down the reset button located on the module, and power the PLC back on while continuing to hold the button for about 10 seconds until the LED indicators flash.

What protocols are supported by the MELSEC QJ71E71 module?

The QJ71E71 module supports several protocols, including TCP/IP, UDP, MELSOFT connection, and MC Protocol, making it versatile for different industrial applications.

How can I update the firmware on a QJ71E71 module?

Obtain the latest firmware from Mitsubishi Electric's official website. Use the GX Works2 software to upload the firmware to the module, following the provided instructions. Ensure the module remains powered during the update process to avoid corruption.

What should I do if the QJ71E71 module does not respond to network requests?

First, verify that the module is powered on and the Ethernet cables are properly connected. Check the IP address settings and ensure there are no IP conflicts on the network. Review the module's LED indicators for error messages and consult the user manual for further troubleshooting steps.

How can I monitor the network traffic of the QJ71E71 module?

Use network monitoring tools such as Wireshark to capture and analyze the network packets sent to and from the QJ71E71 module. This can help identify any unusual traffic patterns or network issues.

Is it possible to use the QJ71E71 module with third-party devices?

Yes, the QJ71E71 module can communicate with third-party devices that support compatible communication protocols like TCP/IP or UDP. Ensure that the network settings and protocols are correctly configured for interoperability.