Error Check Method With Monitor Signal - Mitsubishi Electric MELSEC Q Series User Manual

6
TROUBLESHOOTING
6.1.2
Table 6.2 shows description, cause investigation, and corrective action of errors
depending on monitor signal.
I/O port
X7 X6 X5 X4
Monitor signal
K1RB K0RB K1 K0
6
- 3 6.1 Q Series Safety Relay Module

6.1.2 Error check method with monitor signal

Error check method with monitor signal
Table 6.2 Error handling of safety part with monitor signal
X3 X2 X1 X0
XS Z X1 X0
* * * *
*
* * *
* * *
* * *
*
*
*
* *
* *
*
*
POINT
If the safety power supply has not been powered ON, monitor signals that indicate
normal module operation are not displayed. (The fixed pattern shown in Table 6.2
is displayed.)
Check errors with monitor signals after poweing ON the safety power supply.
Cause
Main module Normal
Main module Normal
Contact welding of K0 relay
Contact welding of K1 relay
Contact welding of K0 and K1 relays
K0 relay does not turn ON.
(Due to a failure on the coil side)
K1 relay does not turn ON.
(Due to a failure on the coil side)
K0 and K1 relays do not turn ON.
(Due to a failure on the coil side)
At auto mode
Off check does not turn ON.
At manual mode
Off check does not turn OFF.
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.
The safety input is incorrect.
The safety power supply has not
been powered ON.
Corrective action
A display when the module does not
start
A display when the module starts
•Replace the module.
•Check if the wiring between start-
up inputs are normal.
•Check if the normally closed
contact connected to the off check
operates normally and the wiring is
normal.
•Check if setting of the start-up
mode is correct.
•Check if the wiring between start-
up inputs are normal.
•Check if the connected start-up
switch operates normally and the
wiring is normal.
•Check if setting of the start-up
mode is correct.
•Replace the module.
•Check if the input device connected
to the safety input operates
normally and the wiring is normal.
Power ON the safety power supply.
: ON, : OFF, *: ON or OFF