Chapter 4 Troubleshooting - Mitsubishi Electric MELSEC iQ-R Series User Manual

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TROUBLESHOOTING
This chapter describes errors that may occur during system operation, error causes, and actions to be taken.
For the troubleshooting specific to each module, refer to the manual for the module used.
Reading devices and saving the program at the time of an error helps to analyze the error cause. For read
operations from the programmable controller, refer to the following.
 GX Works3 Operating Manual
4.1
Troubleshooting Procedure
When the system has any trouble, perform troubleshooting in the following order.
1.
Check the LED status of the power supply module. ( Page 101 When the POWER LED of the power supply module
turns off)
2.
Check the LED status of the remote head module. ( Page 89 Checking with LED)
3.
Check the LED status of each I/O module and intelligent function module. ( User's Manual (Application) for the
module used)
4.
Connect an engineering tool, and execute the system monitor function. The error module can be identified.
[Diagnostics]  [System Monitor]
4 TROUBLESHOOTING
4.1 Troubleshooting Procedure
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