The fault diagnosis of GT3U series PLC can be performed through the “PLC Diagnosis” function of the programming software. The following are some key points and common fault diagnosis methods:
Fault diagnosis steps
Open the diagnosis interface:
In Gx Works 2 software, click “Diagnosis”-“PLC Diagnosis (P)” in the menu bar.
View fault code:
In the diagnosis interface, you can view the current fault code and the program step with the error.
Reference fault code list:
According to the fault code, refer to the “GT3U series fault code list” to understand the fault content and treatment method.
Common faults and solutions
Memory access error (6101)
Solution: Increase the power supply or contact the manufacturer.
Hardware circuit error (6102)
Solution: Contact the manufacturer for repair.
Watchdog timeout (6105)
Solution: Optimize the program or increase the set value of register D8000.
Program and check are inconsistent (6401)
Solution: Check whether the program is complete or whether the FLASH storage is damaged.
Communication timeout (6206)
Solution: Check the communication line, eliminate interference, or adjust the timeout setting.
Instruction usage error (6501)
Solution: Check whether the combination of soft component symbol and number is correct.
Other precautions
Regularly check the connection and configuration of the equipment to prevent failure.
Before performing any maintenance or changes, make sure to turn off the power and follow the safe operating procedures.
With these steps and troubleshooting methods, users can effectively diagnose and solve common problems of GT3U series PLCs.