Mitsubishi Electric MELSEC QS Series User Manual page 142

9
TROUBLESHOOTING
Refer to the troubleshooting of the
remote station.
Modify the product information
setting in network parameters.
Check if the transmission speed
setting is proper and if the
transmission path has any problem.
9
9.2 Check with LEDs (1) - at System Start-up
- 12
9.2.2 When "ERR." LED on the safety master module turns ON or flashes with "RUN" LED on the safety
1
Is the same ID used for the link
ID set in network parameters and the link
ID setting on the remote station?
Yes
Is "ERR." LED on the safety CPU
module ON?
Yes
Is the error code in the PLC diagnostics
error history within the range between 8300
and 8499?
Yes
Is the error code 8300? (Is it a remote
Yes
station error ?)
No
Is the error code 8310? (Is there a
Yes
mismatch in the safety remote station
product information?)
No
Is the error code 8320 or 8322?
Yes (Is it an initial monitoring time out error ?)
(Is it an error monitoring
time out error ?)
No
Is the error code 8321?
(Is it a safety refresh monitoring timeout error?)
(Is it a safety data monitoring
timeout error?)
Yes
Is the scan time exceeding the
value set for the safety refresh monitoring
timer and/or the safety data
monitoring timer?
Yes
Modify the value set for the safety refresh
monitoring timer and/or the safety data
monitoring timer. Or, shorten the sequence
program.
No
Modify the link ID setting.
2
No
No
Refer to the troubleshooting of the
safety CPU module.
No
No
Check the operations of the following
hardware and identify a faulty module.
(1) Safety remote module
(2) Safety master module
(3) Safety CPU module
(4) Safety main base unit