Mitsubishi Q Series User Manual

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MELSEC-Q
8 TROUBLESHOOTING
8.3 If the RUN LED Has Flickered or Turned Off
Check item Corrective action
Is 5VDC supplied?
• Check the power supply module.
• Load the module securely.
Is the sum of current capacities of the modules
loaded on the base unit equal to or less than
the current capacity of the power supply
module?
Make the sum of current capacities of the
modules loaded on the base unit equal to or
less than the current capacity of the power
supply module.
Has a watchdog timer error occurred?
• Reset the programmable controller CPU or
power it on again.
• Change the Q62HLC.
Is a module change enabled during an online
module change?
Refer to Chapter 7 and handle it.
8.4 If the ERR. LED Has Turned On or Flickered
(1) If turned on
Check item Corrective action
Is cold junction temperature compensation
resistance disconnected?
• Connect cold junction temperature
compensation resistance.
• Q62HLC hardware fault.
Please consult your sales representative.
(2) If flickered
Check item Corrective action
Has a write data error occurred?
• Check the error code list in Section 8.1 and
correct the sequence program.

Mitsubishi Q Series Specifications

General

I/O Points	Up to 4096 points
Communication	Ethernet, RS-232, RS-485
I/O Modules	Digital, Analog, Specialized
Programming Language	Function Block Diagram, Structured Text
Power Supply	24V DC, 100-240V AC
Operating Temperature	0°C to 55°C
Shock Resistance	147 m/s2 acceleration, 3 times in each of X, Y, and Z directions
Program Capacity	Up to 252K steps

Summary

SAFETY PRECAUTIONS

Design, Installation, and Wiring Precautions

Covers safety guidelines for design, installation, and wiring to prevent hazards and malfunctions.

Startup, Maintenance, and Disposal Precautions

Safety measures for startup, maintenance, and proper disposal of the module.

SYSTEM CONFIGURATION

SPECIFICATIONS

Q62HLC Performance Specifications

Details analog I/O, input characteristics, accuracy, and conversion speed.

Q62HLC Function Summary

Auto Tuning Functionality

Explains the auto tuning function, execution procedure, and precautions.

PID Control Stop and Loop Disconnection Detection

Explains forced PID control stop and loop disconnection detection mechanisms.

FeRAM Data Storage and Alert System

Alert Function Details and Settings

Details various alert types (input, deviation) and their configuration.

Control Output, Program Control, and Cascade Control

Buffer Memory List and Error Codes

Comprehensive list of buffer memory addresses, settings, and detailed error codes.

Troubleshooting Common Issues

Guides for diagnosing issues based on LED indicators and specific error flags.

SETUP AND PROCEDURE BEFORE STARTING THE OPERATION

Handling and Wiring Precautions

Procedure Before Starting Operation

Switch Settings for Intelligent Function Module

PROGRAMMING

Programming Procedure Overview

Normal System Configuration Programming

Program Examples with and without Utility Package

ONLINE MODULE CHANGE

Online Module Change Conditions and Operations

Online Module Change Procedure

Step-by-step guide for module change using GX Configurator-TC or sequence program.

Precautions for Online Module Change

Important safety and operational precautions to follow before and after module change.

TROUBLESHOOTING

Error Code List and Processing

Comprehensive list of error codes, their causes, and processing during errors.

Troubleshooting Common LED Indicators

Guides for diagnosing issues based on RUN, ERR, and ALM LED status.

Troubleshooting Specific Error Conditions

Addresses specific issues like auto tuning failures, module readiness, and alert flags.

Checking Q62HLC Status via GX Developer

Using GX Developer system monitor for status checks, error codes, and LED information.