Mitsubishi Electric MELSEC iQ-R-R04CPU - When an Error Has Occurred in a Safety Function Module; When the Specific Extension Base Unit Cannot be Recognized; When the Specific Q Series Extension Base Unit Cannot be Recognized

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APPX
Appendix 3 Troubleshooting by Symptom
When an error has occurred in a safety function module
When the READY LED turns off
When the READY LED of the safety function module turns off, check the following.
If the READY LED of the safety function module still does not turn on even after the above actions are taken, the possible
cause is a hardware failure of the module. Please consult your local Mitsubishi representative.
When the specific extension base unit cannot be recognized
For troubleshooting, refer to the following:
 MELSEC iQ-R Module Configuration Manual
When the specific Q series extension base unit cannot be
recognized
For troubleshooting, refer to the following:
 MELSEC iQ-R Module Configuration Manual
Check item Action
Check if the safety function module has been properly mounted. If not, properly mount the module on the base unit.
Check if the system was powered on immediately after power-off. Wait for five seconds or longer after power-off and power on the system again.