Mitsubishi Electric QS001CPU User Manual page 167

12
TROUBLESHOOTING
Error
Code Error Contents and Cause
(SD0)
Safety station product information
mismatch ("Model name" or "Production
8410
information" of a safety station is
incorrect.)
8420
8421
8422
8423
Safety monitoring timeout error (A
timeout error occurred during safety
communication.)
8424
*3 This applies when the serial number (first five digits) of the CPU module is "13042" or later.
Corrective Action
It may be malfunction due to noise.
Check the soundness of transmission
path by performing the CC-Link IE Field
Network diagnostics. Check the
distance between power lines and
communication cables, and the
installation status of each device as
well.
• Check that the following operations
are not performed.
1) Switching the operation mode
2) Writing the program memory to
ROM
3) Registration/change of the CPU
access password
4) Initialization of PLC memory
5) Monitoring, diagnostics
(If executed, this error may occur due
to the increase of the interval
between data communications of CC-
Link IE Field.)
• Set the larger value for the safety
refresh monitoring time. Or set the
smaller value for the transmission
interval monitoring time.
• It may be malfunction due to noise.
Check the soundness of transmission
path by performing the CC-Link IE
Field Network diagnostics. Check the
distance between power lines and
communication cables, and the
installation status of each device as
well.
12.3 Error Code List
12.3.8 Error code list (8000 to 9000)
9
Corresponding
CPU
10
*3
QS
11
*3
QS
12
*3
QS
12
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