Mitsubishi Electric QS001CPU User Manual page 169

12
TROUBLESHOOTING
Error
Code Error Contents and Cause
(SD0)
Safety monitoring timeout error (A
8425 timeout error occurred during safety
communication.)
*3 This applies when the serial number (first five digits) of the CPU module is "13042" or later.
Corrective Action
• 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.)
• Check that the transmission interval
monitoring time for the target station
is correctly set.
• 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
11
*3
QS
12
12
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