
11. TROUBLESHOOTING
11 - 10
MELSEC-A
11.3
Error Code List
If an error occurs in the RUN mode, an error display or error code (including a step
number) is stored in the special register by the self-diagnosis function. The error
code reading procedure and the causes of and corrective actions for errors are
shown in Table 11.1.
11.3.1
Error codes
The followings are the explanation about the descriptions and the causes of the
error messages, error codes and the detailed error codes, and their corrective
actions.
The detailed error codes are stored in D9092 only when using the dedicated
instruction for CC-Link.
Table 11.1 Error codes
Error Message
Error
Code
(D9008)
Detailed
Error
Code
(D9092)
CPU
States
Error and Cause
Corrective Action
Instruction code, which cannot be
decoded by CPU module, is included
in the program.
(1)
Memory cassette including
instruction code, which cannot
be decoded, has been loaded.
(2)
Since the memory contents have
changed for some reason,
instruction code, which cannot
be decoded, has been included.
(1)
Read the error step by use of
peripheral equipment and correct
the program at that step.
(2)
In the case of memory cassette,
rewrite the contents or replace
the cassette with a memory
cassette which stores correct
contents.
101
Instruction code, which cannot be
decoded by CPU module, is included
in the program.
(1)
Memory cassette including
instruction code, which cannot
be decoded, has been loaded.
(2)
Since the memory contents have
changed for some reason,
instruction code, which cannot
be decoded, has been included.
(1)
Read the error step by use of
peripheral equipment and correct
the program at that step.
(2)
In the case of memory cassette,
rewrite the contents or replace
the cassette with a memory
cassette which stores correct
contents.
103
Device specified by a dedicated
instruction for CC-Link is not correct.
104
A dedicated instruction for CC-Link
has incorrect program structure.
"INSTRCT.
CODE ERR"
10
105
Stop
A dedicated instruction for CC-Link
has incorrect command name.
Read the error step using a peripheral
device and correct the program of the
step.
"PARAMETER
ERROR"
11
Stop
The contents of parameters of CPU
memory have changed due to noise
or the improper loading of memory.
(1)
Load the memory cassette
correctly.
(2)
Read the parameter contents of
CPU memory, check and correct
the contents, and write them to
CPU again.
"MISSING END
INS."
12
Stop
There is no END ( FEND )
instruction in the program.
Write END instruction at the end of
program.
Содержание A1SH
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