Extension Safety Relay Module; Error Check Method With Led - Mitsubishi Electric MELSEC Q Series User Manual

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TROUBLESHOOTING
6.3

Extension Safety Relay Module

6.3.1

Error check method with LED

Table 6.5 shows description, cause investigation, and corrective action of errors
depending on LED display on the module.
LED signal
PW ERR. Z K1
*
* * *
Table 6.5 Error handling of safety part with LED
K0 X1 X0
Extension module
Main module
The module power supply is not normally
*
supplied.
Contact welding of K0 and K1 relays
K0 and K1 relays do not turn ON.
Safety system 1 does not turn ON.
Safety system 2 does not turn ON.
Safety system 1 does not turn OFF.
Safety system 2 does not turn OFF.
•System error occurred.
* * *
•No power supply on safety side
* 1: The status that start-up processing has been performed to the module
Cause
Normal A display when the module does not start
Normal A display when the module starts
•Check if the power supply is normally
supplied.
•Check between the power supplies for
short.
•In case of input N type, check between
the dual inputs for short.
*1
*1
•Replace the module.
*1
*1
*1
•Check if the power supply is normally
supplied.
•Check between the power supplies for
short.
6.3 Extension Safety Relay Module
6.3.1 Error check method with LED
Corrective action
: ON, : OFF, *: ON or OFF
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