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6.1 Q Series Safety Relay Module
6.1.1 Error check method with LED
6
TROUBLESHOOTING
(3) Narrowing down the trouble cause
Guess the failure location to any of the following by checking (1) and (2) above.
1) Safety relay module or external device?
2) Main module, extension module or another module?
3) Programmable controller?
4) Sequence program?
6.1 Q Series Safety Relay Module
6.1.1 Error check method with LED
Table 6.1 shows description, cause investigation, and corrective action of errors
depending on LED display on the module.
: ON, : Flash, : OFF, *: ON or OFF
* 1: The status that start-up processing has been performed to the module
Table 6.1 Error handling of safety part with LED
LED signal
Cause Corrective action
PW S PW ERR. Z K1 K0 X1 X0
Normal (before start-up) -
Normal (started up) -
* *****
The safety power supply is not
normally supplied.
•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.
***
The module power supply is not
normally supplied.
•Check if the power supply is
normally supplied.
•Check between the power supplies
for short.
* * Contact welding of K0 and K1 relays
•Replace the module.
K0 and K1 relays do not turn ON.
*1
**
Safety system 1 does not turn ON.
*1
**
Safety system 2 does not turn ON.
*1
Safety system 1 does not turn
OFF.
*1
Safety system 2 does not turn
OFF.
*1
** *****•System error occurred.
•Check if the power supply is
normally supplied.