Contents

SAFETY PRECAUTIONS
CONDITIONS OF USE FOR THE PRODUCT
Revisions
INTRODUCTION
Table of Contents
About This Manual
Reading This Manual
Differences Between Q4ARCPU and QnACPU
Using the MELSECNET/10 for the First Time
Commom Section
- 1 Overview
  - 1.1 Simplex Network Characteristics
    - 1.1.1 PLC to PLC network and remote I/O network common characteristics
    - 1.1.2 PLC to PLC network characteristics
    - 1.1.3 Remote I/O network characteristics
  - 1.2 Duplex Network Characteristics
    - 1.2.1 PLC to PLC network
    - 1.2.2 Remote I/O network
  - 1.3 Abbreviations in the Text, Tables and Figures
  - 1.4 Defining the Control System and Standby System
  - 1.5 Programmable Controller CPU and Network Module Combinations
  - 1.6 Remote I/O Module
- 2 System Configuration
  - 2.1 Simplex Network
    - 2.1.1 PLC to PLC network
    - 2.1.2 Remote I/O network
  - 2.2 Duplex Network
    - 2.2.1 Precautions for the system configuration
    - 2.2.2 PLC to PLC network
    - 2.2.3 Remote I/O network
  - 2.3 Compound System
    - 2.3.1 PLC to PLC network
    - 2.3.2 Remote I/O network
    - 2.3.3 MELSECNET (II) and MELSECNET/B compound systems
- 3 Specifications
  - 3.1 Performance Specifications
  - 3.2 Optical Fiber Cable Specifications
  - 3.3 Coaxial Cable Specifications
    - 3.3.1 Coaxial cable specification
    - 3.3.2 Connecting the coaxial cable connectors
- 4 Setting and Procedures Before System Operation
  - 4.1 Procedure before system operation
  - 4.2 Name and Setting of Each Part
    - 4.2.1 AJ71QLP21(G, S), AJ71QLR21, AJ71QBR11 (for control station/normal station/remote master station)
    - 4.2.2 A1SJ71QLP21(GE, S), A1SJ71QLR21, A1SJ71QBR11 (for control station/normal station/remote master station)
    - 4.2.3 AJ72QLP25(G), AJ72QLR25, AJ72QBR15 (for remote I/O station)
    - 4.2.4 A1SJ72QLP25, A1SJ72QLR25, A1SJ72QBR15 (for remote I/O station)
  - 4.3 Connection and station number setting
    - 4.3.1 Optical loop system
    - 4.3.2 Coaxial loop system
    - 4.3.3 Coaxial bus system
  - 4.4 Offline Tests
    - 4.4.1 Hardware testing
    - 4.4.2 Internal self-loop back testing
    - 4.4.3 Self loop back testing
    - 4.4.4 Station to station testing
    - 4.4.5 Forward loop/reverse loop testing
    - 4.4.6 Confirmation of network number, group number, and station number
  - 4.5 Online tests
    - 4.5.1 Loop testing (only for optical loop/coaxial loop systems)
    - 4.5.2 Setting check testing
    - 4.5.3 Station order check testing (only for optical loop/coaxial loop systems)
    - 4.5.4 Communication testing
- 5 Network Monitoring
  - 5.1 Line Monitoring (Host)
    - 5.1.1 Checking the line status and link scan time (line monitoring (host))
    - 5.1.2 Check the control station and data link status (detailed line monitor)
    - 5.1.3 Checking the data link, CPU, and loop status for each station (line monitoring (other stations))
  - 5.2 Status Monitor
    - 5.2.1 Check the host's module status (status monitoring)
    - 5.2.2 Checking the host's switches/parameters, and data link status (detailed status monitor)
    - 5.2.3 Checking the host's online testing status (test monitoring)
  - 5.3 Error History Monitor
    - 5.3.1 Line error accumulation count can be checked for each line (error history monitoring)
    - 5.3.2 Checking the cause for the loop switching transient transmission error status (error history monitoring details)
- 6 Link Data Communication Processing and Processing Time
  - 6.1 PLC to PLC network
    - 6.1.1 Link data communication processing
    - 6.1.2 Transmission delay time
  - 6.2 Remote I/O network
    - 6.2.1 Link data communication processing
    - 6.2.2 Transmission delay time
  - 6.3 Transmission Delay Time When Accessing Link Device Directly
    - 6.3.1 PLC to PLC network
    - 6.3.2 Remote I/O network
  - 6.4 Minimizing the Link Refresh Time
Simplex Network Section
- 7 Let's Grasp the MELSECNET/10 Image!
  - 7.1 PLC to PLC Network (Double-layer System Communication)
    - 7.1.1 Communication with default parameters
    - 7.1.2 Communication with common parameters
  - 7.2 Remote I/O Network
    - 7.2.1 Communication with the I/O module
    - 7.2.2 Communication with the special function module
- 8 Function
  - 8.1 Cyclic Transmission Function
    - 8.1.1 Communication by B/W (PLC to PLC network)
    - 8.1.2 Communication by X/Y (PLC to PCL network)
    - 8.1.3 Communication with I/O module (Remote I/O network)
    - 8.1.4 Communication with the special function module (Remote I/O network)
    - 8.1.5 Stopping/restarting cyclic transmission and stopping link refresh
    - 8.1.6 Inter data link transfer function
    - 8.1.7 Direct access to the link device
    - 8.1.8 Increasing the send points by installing multiple modules of the same network No. (PLC to PLC network)
    - 8.1.9 Default values of network refresh parameters
  - 8.2 Transient Transmission Function
    - 8.2.1 Communication range
    - 8.2.2 Routing function
    - 8.2.3 Group function (PLC to PLC network only)
    - 8.2.4 Link dedicated instructions
    - 8.2.5 Specifying default network
    - 8.2.6 Clock setting at stations in the network from peripheral devices
  - 8.3 Control Station Transfer Function
  - 8.4 Multiplex Transmission Function (Optical Loop/Coaxial Loop System)
  - 8.5 Reserve Station Function
  - 8.6 Simplified Network Duplexing (PLC to PLC Network)
  - 8.7 Multiple Master System (Remote I/O Network)
  - 8.8 Parallel Master System (Remote I/O Network)
  - 8.9 Setting the Remote I/O Station Output Status when the System is Down Due to the Master Station Error (Remote I/O Network)
  - 8.10 SB/SW Can be used as you like (user Flags)
  - 8.11 RAS Function
    - 8.11.1 Automatic recovery function
    - 8.11.2 Loop back function (optical loop/coaxial loop system)
    - 8.11.3 Preventing stations from going down by using the external power supply (PLC to PLC network: optical loop system)
    - 8.11.4 Station detachment function (coaxial bus system)
    - 8.11.5 Transient transmission is possible when the programmable controller CPU is in fault
    - 8.11.6 Confirming the transient transmission error detection time
    - 8.11.7 Diagnostic function
  - 8.12 Fuse blown error/I/O verify error check disable function (error clear function : remote I/O network)
- 9. Parameter Setting
  - 9.1 Default Parameters (Transmission Range Setting for Each Station by DIP Switches on Network Module)
  - 9.2 Number of Module Setting
  - 9.3 Network Setting
  - 9.4 Network Refresh Parameter
  - 9.5 Common Parameter
    - 9.5.1 PLC to PLC Network
    - 9.5.2 Remote I/O Network
  - 9.6 Station Specific Parameter
  - 9.7 I/O Allocation
  - 9.8 Transfer Parameters for Data Link
  - 9.9 Routing Parameters
- 10. Programming
  - 10.1 Precautions when Programming
    - 10.1.1 Program overall
    - 10.1.2 Cyclic transmission
    - 10.1.3 Transient transmission
  - 10.2 Link-dedicated Instructions
    - 10.2.1 Send/receive data (JP/GP.SEND,JP/GP.RECV)
    - 10.2.2 Read/write word device of other stations (JP/GP.READ,JP/GP.SREAD,JP/GP.WRITE,JP/GP.SWRITE)
    - 10.2.3 Transient request to other stations (J(P)/G(P).REQ)
    - 10.2.4 Read/write word device of other stations (J(P).ZNRD,J(P).ZNWR)
    - 10.2.5 Read/write the buffer memory of the special function module at remote I/O station (JP/GP.ZNFR,JP/GP.ZNTO)
  - 10.3 User Flag Control Instruction
    - 10.3.1 User flag set instruction (J.UFSET)
    - 10.3.2 User flag reset instruction (J.UFRST)
    - 10.3.3 User flag out instruction (J.UFOUT)
  - 10.4 Programs for Simplified Duplex System
  - 10.5 Programs for Multiple Master System
    - 10.5.1 When multiple remote master station and multiple remote submaster station are installed on one QnA(R)CPU
    - 10.5.2 When the multiple remote master station and multiple remote submaster station are installed on different QnA(R)CPUs
  - 10.6 Programs for Parallel Mater System
  - 10.7 Link Special Relay (SB)/Register (SW)
    - 10.7.1 Link special relay (SB)
    - 10.7.2 Link special register (SW)
    - 10.7.3 SB/SW valid during offline test
  - 10.8 Remote I/O Station Special Relay (M,SM)/ Special Register (D,SD)
    - 10.8.1 Special relay (M,SM)
    - 10.8.2 Special register (D,SD)
Duplex Network Section
- 11. Let's Grasp the Duplex Network Image!
  - 11.1 PLC to PLC network
    - 11.1.1 System configuration
    - 11.1.2 Setting the parameters
    - 11.1.3 Creating data for pairing setting
    - 11.1.4 Creating a program
    - 11.1.5 Confirming the operation when control system and standby system are normal
    - 11.1.6 Confirming the status when the control system's power is off
  - 11.2 Remote I/O Network (Multiple Master System)
    - 11.2.1 System configuration
    - 11.2.2 Setting the parameters
    - 11.2.3 Creating a program
    - 11.2.4 Confirming the operation when control system and standby system are normal
    - 11.2.5 Checking the status when the control system's power is turned off
- 12. Function
  - 12.1 Difference from the simplex network
  - 12.2 PLC to PLC network
    - 12.2.1 Relationship between the control system/standby system and the control station/normal station
    - 12.2.2 Data communication status of the control system and the standby system (cyclic transmission)
    - 12.2.3 Control station transfer function
    - 12.2.4 Switching the control system and the standby system depending on the CPU status
    - 12.2.5 Switching the control system and the standby system depending on the network module status
    - 12.2.6 Routing function
  - 12.3 Remote I/O Network
    - 12.3.1 Relationship between the control system/standby system and the multiple remote master station/multiple remote submaster station
    - 12.3.2 Data communication status of the control system/standby system (cyclic transmission)
    - 12.3.3 Switching the control system and the standby system depending on the CPU status
    - 12.3.4 Switching the control system and the standby system depending on the network module status
    - 12.3.5 Routing Function
  - 12.4 RUN/STOP status of Q4ARCPU in the control system and Q4ARCPU in the standby system
  - 12.5 Caution about using a duplex network
    - 12.5.1 Caution about changeovere due to a communication error on the network module
    - 12.5.2 Communication status monitoring program for the network module of a standby system
    - 12.5.3 Caution about system construction and power up
- 13. Parameter Setting
  - 13.1 Differences from simplex network
  - 13.2 Common parameters for PLC to PLC network
- 14. Programming
  - 14.1 Precautions for programming
  - 14.2 PLC to PLC Network
  - 14.3 Remote I/O Network
  - 14.4 Pairing Setting Instruction (J.PAIRSET)
  - 14.5 Link Special Relay (SB)/Register (SW)
    - 14.5.1 Link special relay (SB)
    - 14.5.2 Link special register (SW)
Troubleshooting Section
- 15. Troubleshooting
  - 15.1 Error Codes
  - 15.2 Troubleshooting
    - 15.2.1 Things to check first
    - 15.2.2 When data link is disabled in the entire system
    - 15.2.3 When data link is disabled by the reset of each station and power-supply off
    - 15.2.4 When data link is disabled at specific station
    - 15.2.5 When transmission data is erroneous station
    - 15.2.6 When duplex system is not operating correctly
    - 15.2.7 When loopback cannot be performed on a station
    - 15.2.8 When a failed station cannot be paralleled on again even by powering up the system again
  - 15.3 Network Module LEDs
Appendix
- Appendix 1. Remote I/O station devices
- Appendix 2. Precautions for using intelligent special function module at the remote I/O station
WARRANTY

Mitsubishi Electric QnA, Q4AR Reference Manual

Mitsubishi Electric QnA, Q4AR manual cover

Pages 640

Year 1996

Language(s)

of 640

Mitsubishi Electric QnA, Q4AR Specification

The Mitsubishi Electric QnA, Q4AR is a sophisticated programmable logic controller (PLC) designed to deliver high performance and reliability in industrial automation applications. It is part of the Q Series family, renowned for its advanced capabilities and flexibility. The QnA, Q4AR module is engineered to support complex control processes, integrating various automation tasks into a single, streamlined system. It operates with a high-speed processor that ensures rapid execution of control tasks, improving system efficiency and productivity.

The Q4AR model features robust memory capacity for storing comprehensive programs and data, enabling intricate operations and extensive control logic. It supports multiple communication protocols, facilitating seamless integration with other devices and systems in a manufacturing environment. This compatibility ensures that the Q4AR can be easily incorporated into existing infrastructures, enhancing its adaptability and scalability.

The module is designed with a user-friendly interface, providing intuitive programming and configuration options that reduce setup time and simplify maintenance. Its architecture supports distributed control systems, allowing for modular expansion and easy upgrades. This flexibility is vital for adapting to changing industrial requirements and technologies.

The Mitsubishi Electric QnA, Q4AR is built to withstand harsh industrial environments, ensuring durability and longevity. It includes advanced diagnostic functions, providing real-time monitoring and fault detection to minimize downtime and optimize performance. Overall, the Q4AR model stands as a reliable and efficient solution for modern industrial automation, offering a blend of power, flexibility, and ease of use.

Mitsubishi Electric QnA, Q4AR F.A.Q.

How do I perform a factory reset on the Mitsubishi Electric QnA module?

To perform a factory reset, turn off the power, set all DIP switches to their default positions, and then power the module back on while holding the reset button for 10 seconds.

What should I do if the Q4AR module is not communicating with other devices?

Ensure that all cables are securely connected and check the network configuration settings. Verify that the baud rate and other communication settings match those of the connected devices.

How can I update the firmware on my Mitsubishi Electric Q4AR module?

Download the latest firmware from the Mitsubishi Electric website, connect your module to a computer via USB, and use the provided update tool to install the firmware.

What maintenance procedures should be performed regularly on the QnA series modules?

Regularly check for dust and debris in and around the module, ensure all connections are tight, and perform software diagnostics to check for errors.

Why is my Q4AR module overheating, and how can I prevent it?

Overheating can be caused by poor ventilation or excessive load. Ensure the module is installed in a well-ventilated area and consider reducing the workload by distributing tasks across multiple modules.

How do I configure the network settings on the QnA module?

Access the configuration menu via the module's interface, navigate to the network settings section, and input the desired IP address, subnet mask, and gateway.

What are the steps to diagnose power supply issues in the Q4AR module?

Check the power supply connections, verify the voltage levels with a multimeter, and inspect the power supply unit for any visible damage or faults.

Can I use third-party software with the Mitsubishi Electric QnA modules?

Yes, third-party software can be used, but it must be compatible with the QnA modules. Consult the software documentation for compatibility and configuration instructions.

What precautions should be taken when installing the Q4AR module?

Ensure the module is installed in a dry, dust-free environment. Use the correct mounting hardware and follow the installation guidelines provided in the manual to avoid damage.

How do I troubleshoot frequent disconnections in my QnA series network?

Check for loose or damaged cables, ensure the network settings are correct, and update the firmware to the latest version to fix any known issues.