Reference Information - Omron CP1L - 12-2007 Operation Manual

Troubleshooting
Memory Errors
Automatic transfer from the Memory Cassette
at startup failed because the required data is
not on the Memory Cassette.
An error has occurred in memory. One or
more bits in A403 will turn ON to indicate
where the error has occurred. See below for
details.
478
Probable cause
• Memory Error Location
A403.00 is ON A checksum error
has occurred in the
user program.
The power supply
was turned OFF
when backing up the
user program to
flash memory.
A403.04 is ON A checksum error
has occurred in the
PLC Setup.
A403.07 is ON A checksum error
has occurred in the
routing tables.
A403.09 is ON The contents of a
Memory Cassette
could not be nor-
mally read to the
CPU Unit when
power was turned
ON.
A403.10 is ON There is a problem
with flash memory.

■ Reference Information

Error flag
Error code (A400)
Error information
Store the required data on the Memory Cas-
sette.
See below.
Transfer the user program again.
Transfer the PLC Setup again.
Transfer the routing tables again.
Check to see if the files required for automatic
transfer at startup are present on the Memory
Cassette.
A hardware error has occurred in the CPU Unit.
Replace the CPU Unit.
Memory Error Flag, A401.15
80F1
Memory Error Location, A403
Section 9-2
Possible remedy