Mitsubishi MELSEC-A series, Programming Manual

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9. ERROR CODE LIST
9 ERROR CODE LIST
If an error occurred when the PC is in RUN mode, error indication is given by self-checking
function and corresponding error code and error step are stored in special registers. This
section gives description of cause and corrective action for each case of error.
9.1 Reading Error Codes
If an error occurred, corresponding error code can be read from the peripheral. For details,
refer to the operation manual of the peripheral.
9.2 Error Code List for the An, AnN, A3H, A3M, A3V, A0J2H, AnS, A2C, A73, A52G, A1FX and A3N board
Table 9.1 shows the error messages, description and cause of error and corrective
actions. Error codes and error steps are stored in the following special registers.
Error code: D9008
Error step: D9010 and D9011
Table 9.1 Error Code List for the An, AnN, A3H, A3M, A3V, A0J2H, AnS, A2C, A73, A52G, A1FX and A3N board
Error Message
Error Code
(D9008)
CPU States Error and Cause Corrective Action
"INSTRCT. CODE
ERR" (Checked at
the execution of
instruction)
10 Stop Instruction code, which cannot be
decoded by CPU, is included in the
program.
(1)
EP-ROM or memory cassette, 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 a
peripheral equipment and correct
the program at that step.
(2)
In the case of EP-ROM or memory
cassette, rewrite the contents or
replace with an EP-ROM or memory
cassette which stores correct
contents.
"PARAMETER
ERROR"
(Checked at
power-on,
STOP RUN,
and
PAUSE RUN)
11 Stop
(1)
Capacity larger than the memory
capacity of CPU module has been
set with the peripheral equipment
and then write to CPU module has
been performed.
(2) The contents of parameters of CPU
memory have changed due to noise
or the improper loading of memory.
(3) RAM is not loaded to the A1 or
A1NCPU.
(1) Check the memory capacity of CPU
with the memory capacity set by
peripheral equipment and re-set
incorrect area.
(2) Check the loading of CPU memory
and load it correctly. Read the
parameter contents of CPU memory,
check and correct the contents, and
write them to CPU again.
(3) Install the RAM and write parameter
contents from a peripheral device.
"MISSING END
INS."
(Checked at
STOP RUN)
12 Stop (1) There is no ( ) instruction
in the program.
(2) When subprogram has been set by
the parameter, there is no
instruction in the subprogram.
Write instruction at the end of
program.
END
FEND
END
END