Contents

SAFETY PRECAUTIONS
CONDITIONS OF USE FOR THE PRODUCT
INTRODUCTION
COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES
RELEVANT MANUALS
CONTENTS
MANUAL PAGE ORGANIZATION
TERMS
PACKING LIST
CHAPTER 1 OVERVIEW
- 1.1 Features
- 1.2 Control System to Use the Q61LD
CHAPTER 2 SYSTEM CONFIGURATION
- 2.1 Applicable Systems
- 2.2 When Using the Q61LD with Redundant CPU
- 2.3 Checking the Function Version and Serial Number
CHAPTER 3 SPECIFICATIONS
- 3.1 Performance Specifications
  - 3.1.1 Conversion characteristics
  - 3.1.2 Accuracy
  - 3.1.3 Number of parameters
- 3.2 Function List
CHAPTER 4 FUNCTION
- 4.1 General Characteristics of Load Cells
- 4.2 Fixed Tare, Gross Weight, and Net Weight
- 4.3 Operation of Gross Weight Output Value (Un\G100, Un\G101) and Digital Output Value (Un\G102, Un\G103)
  - 4.3.1 When the tare zero offset function is not used
  - 4.3.2 When the tare zero offset function is used
- 4.4 Conversion Enable/Disable Function
- 4.5 Setting Load Cell Specifications
- 4.6 Tare Zero Offset Function
- 4.7 Gravitational Acceleration Correction Function
- 4.8 Two-point Calibration Function
  - 4.8.1 Precautions for two-point calibration
  - 4.8.2 Setting method
  - 4.8.3 Calculation of gross weight output value
  - 4.8.4 When calibration is performed without an actual load
- 4.9 Weight Conversion Method
- 4.10 Zero Tracking Function
- 4.11 Zero Set/Reset Function
- 4.12 Input Signal Error Detection Function
  - 4.12.1 Operation upon input signal error by the status of Conversion- over/automatic restoration setting (Un\G19)
- 4.13 Warning Output Function
- 4.14 Center Point (1/4 scale) Detection Function
- 4.15 Stable Status
- 4.16 Maximum and Minimum Values Hold Function
- 4.17 Output Value Hold Function
- 4.18 Default Setting Registration Function
CHAPTER 5 I/O SIGNALS SENT TO/FROM CPU MODULE
- 5.1 I/O Signals List
- 5.2 I/O Signal Details
CHAPTER 6 BUFFER MEMORY
- 6.1 Buffer Memory List
- 6.2 Setting Data Details
CHAPTER 7 PROCEDURES AND SETTINGS BEFORE SYSTEM OPERATION
- 7.1 Handling Precautions
- 7.2 Procedure Before Operation
- 7.3 Part Names
- 7.4 Wiring
  - 7.4.1 Wiring precautions
  - 7.4.2 External wiring
CHAPTER 8 VARIOUS SETTINGS
- 8.1 Adding Modules
- 8.2 Parameter Setting
- 8.3 Auto Refresh Setting
- 8.4 Two-point Calibration
- 8.5 Default Setting Registration
CHAPTER 9 PROGRAMMING
- 9.1 Programming Procedure
- 9.2 Programming in Normal System Configuration
- 9.3 Programming for Remote I/O Network
- 9.4 Program Example for Constant Amount Control
CHAPTER 10 ONLINE MODULE CHANGE
- 10.1 Precautions for Online Module Change
- 10.2 Conditions of Online Module Change
- 10.3 Operation during Online Module Change
- 10.4 Procedures of Online Module Change
- 10.5 When Parameters are Set by the Configuration Function (When Another System is Available)
- 10.6 When Parameters are Set by a Sequence Program (When Another System is Available)
- 10.7 When Parameters are Set by the Configuration Function (When Another System is Unavailable)
- 10.8 When Parameters are Set by a Sequence Program (When Another System is Unavailable)
- 10.9 Save/Restoration Setting List
- 10.10 Correction Factor Calculating Method
CHAPTER 11 TROUBLESHOOTING
- 11.1 Error Code List
- 11.2 Troubleshooting
  - 11.2.1 When the RUN LED turns off
  - 11.2.2 When the RUN LED flashes
  - 11.2.3 When the ERR. LED flashes
  - 11.2.4 When the ERR. LED turns on
  - 11.2.5 When the ALM LED flashes
  - 11.2.6 When the ALM LED turns on
  - 11.2.7 When Input signal error detection signal (XC) turns on
  - 11.2.8 When a measured weight value cannot be read
  - 11.2.9 When a measured weight value is abnormal
  - 11.2.10 When the two-point zero calibration is completed abnormally
  - 11.2.11 When the two-point span calibration is completed abnormally
  - 11.2.12 When the default setting registration is completed abnormally
  - 11.2.13 Checking the Q61LD status using system monitor of GX Works2
APPENDICES
- Appendix 1 Dedicated Instructions
  - Appendix 1.1 G(P).OGLOAD
  - Appendix 1.2 G(P).OGSTOR
- Appendix 2 Additions and Changes of Functions by Upgrade
- Appendix 3 When GX Developer is Used
- Appendix 4 Two-point Calibration when a Sequence Program is Used
  - Appendix 4.1 Setting and procedure
  - Appendix 4.2 Program example for two-point calibration
  - Appendix 4.3 When calibration is performed without an actual load
- Appendix 5 External Dimensions
INDEX
REVISIONS
WARRANTY
TRADEMARKS

Mitsubishi Electric MELSEC Q Q61LD User's Manual

Mitsubishi Electric MELSEC Q Q61LD manual cover

Pages 274

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Mitsubishi Electric MELSEC Q Q61LD Specification

The Mitsubishi Electric MELSEC Q Q61LD is a sophisticated power supply module designed for the Q Series PLC systems, providing essential electrical power to the CPU and other connected modules. It features a compact design that seamlessly integrates into the modular Q Series framework, enhancing the system's flexibility and scalability. The Q61LD operates with an input voltage of 100 to 240 VAC and offers an output capacity of 5V DC at 6.5A, ensuring stable power distribution to various modules within the PLC system. The module is equipped with advanced overload protection and short-circuit safeguards to maintain operational reliability and prevent damage due to electrical faults. Additionally, it supports a wide operating temperature range, making it suitable for diverse industrial environments. The Q61LD's design emphasizes ease of installation and maintenance, featuring a straightforward connection interface and LED indicators for status monitoring. Its robust construction ensures durability, while its compact form factor optimizes space within control cabinets. Overall, the MELSEC Q61LD is a reliable power supply solution that enhances the performance and reliability of Mitsubishi's Q Series PLC systems.

Mitsubishi Electric MELSEC Q Q61LD F.A.Q.

How do I configure the MELSEC Q Q61LD for basic I/O operations?

To configure the MELSEC Q Q61LD for basic I/O operations, you need to set up the I/O modules using the GX Developer or GX Works2 software. Begin by creating a new project and selecting the correct PLC type. Then, configure the I/O parameters under the parameter settings section, and download the configuration to the PLC.

What steps should I take if the MELSEC Q Q61LD is not powering on?

If the MELSEC Q Q61LD is not powering on, first check the power supply connections and ensure they are secure. Verify that the power supply module is functioning. Check for any blown fuses or tripped circuit breakers. Finally, inspect the PLC for any visible damage or loose components.

How can I perform a firmware update on the MELSEC Q Q61LD?

To perform a firmware update on the MELSEC Q Q61LD, you will need the latest firmware file and the GX Works2 software. Connect the PLC to your computer via USB or Ethernet, and use the software's firmware update tool to upload the new firmware to the PLC. Follow the on-screen instructions to complete the update process.

What are common reasons for communication errors between the MELSEC Q Q61LD and connected devices?

Common reasons for communication errors include incorrect configuration settings, faulty cables or connections, incompatible communication protocols, and interference from other electronic devices. Ensure all settings are correct and cables are intact. Consider using shielded cables to reduce interference.

How do I back up and restore programs on the MELSEC Q Q61LD?

To back up programs, connect your PC to the MELSEC Q Q61LD using GX Developer or GX Works2, and use the transfer tool to upload the program to your PC. To restore, download the saved program from your PC to the PLC using the same software. Always verify the program integrity after restoration.

Can I expand the I/O capacity of the MELSEC Q Q61LD, and if so, how?

Yes, the I/O capacity of the MELSEC Q Q61LD can be expanded by adding additional I/O modules to the main base unit or using extension base units. Ensure that the total number of modules and the power consumption remains within the specified limits of the PLC system.

What should I do if the MELSEC Q Q61LD is not responding to program changes?

If the MELSEC Q Q61LD is not responding to program changes, ensure the PLC is in the STOP mode before downloading. Verify that the changes are correctly saved and compiled in the programming software. Check communication settings and cable connections between the PLC and the programming device.

How often should I perform maintenance checks on the MELSEC Q Q61LD?

Regular maintenance checks should be performed every 6 to 12 months, depending on the operating environment. Inspect for dust accumulation, loose connections, signs of overheating, and check the condition of cables and connectors. Perform firmware updates as necessary.

Is it possible to connect the MELSEC Q Q61LD to a SCADA system?

Yes, the MELSEC Q Q61LD can be connected to a SCADA system using communication protocols like Modbus, Ethernet/IP, or CC-Link. Ensure the PLC is configured with the correct communication settings and that the SCADA system is compatible with these protocols.

What diagnostic tools are available for troubleshooting the MELSEC Q Q61LD?

Diagnostic tools for the MELSEC Q Q61LD include the GX Works2 or GX Developer software, which can be used for monitoring and testing the PLC's status, I/O modules, and network connections. The PLC also has built-in diagnostic LEDs and error codes for initial troubleshooting.