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APPENDICES
APPENDICES
APPENDIX1 SCPU ERROR CODE LIST
When an error occurs, check the points stated in this manual and reset the error.
1.1
SCPU Error Code List
Error Message
(When an A273UHCPU
(8/32 Axes Specification) Is Used)
"INSTRCT.CODE ERR"
(When an instruction is executed.)
"PARAMETER ERROR"
On switching on the power or resetting.
On switching from
STOP
RUN
to
PAUSE
STEP RUN
"MISSING END INS."
When M9056 or M9057 is ON.
On switching from
STOP
RUN
to
PAUSE
STEP RUN
"CAN'T EXECUTE (P)"
When a CJ/SCJ/JMP/CALL(P)/
FOR-NEXT instruction is executed.
On switching from
STOP
RUN
to
PAUSE
STEP RUN
If an error occurs when the PLC is switched to the RUN status or is in the RUN
status, the error indication and error code (including the step number) are stored in
a special register by the self-diagnosis function. When an error occurs, refer to
Table 1.1 for its cause and the corrective action to take.
Eliminate the cause of the error by taking the appropriate corrective action.
Error codes can be read at a peripheral device; for details on the relevant
operation, see the Operating Manual for the peripheral device.
The list presented below gives the error numbers, and the error contents, causes,
and corrective actions for each error message.
Table 1.1 Error Code List
Contents of
Special
CPU
Register
Status
D9008
(BIN Value)
10
Stopped
11
Stopped
12
Stopped
13
Stopped
CAUTION
Error Contents and Cause
An instruction code that cannot be decoded has been
included in the program.
(1) A ROM which includes undecodable instruction
codes has been installed.
(2) The memory contents have changed for some
reason and now include an undecodable instruction
code.
The parameter data in the CPU's memory has been
changed due to noise or incorrect installation of the
memory.
(1) There is no END (FEND) instruction in the program.
(2) When a subprogram is set in the parameters, there
is no END instruction in the subprogram.
(1) The jump destination designated with a
CJ/SCJ/CALL/CALLP/JMP instruction does not exist,
or more than one exists.
(2) There is a CHG instruction but no subprogram is set.
(3) Although there is no CALL instruction, there is a
RET instruction in the program and is has been
executed.
(4) A CJ/SCJ/CALL/CALLP/JMP instruction whose jump
destination is at or beyond the END instruction has
been executed.
(5) The number of FOR instructions does not match the
number of NEXT instructions.
(6) A JMP instruction has been included between a
FOR and NEXT command, exiting the FOR - NEXT
sequence.
(7) The subroutine has been exited by execution of a
JMP instruction before execution of a RET
instruction.
(8) Execution of a JMP instruction has caused a jump
into a step in a FOR - NEXT range, or into a
subroutine.
APP − 1
Corrective Action
(1) Read the error step with a
peripheral device, and correct the
program at that step.
(2) If the ROM is the problem, either
rewrite its contents or replace it
with a ROM into which the correct
contents have been written.
(1) Check the installation of the
memory and install it correctly.
(2) Read the parameter data of the
CPU memory at a peripheral
device, check the data, correct it,
and write the corrected data back
into the memory.
(1) Write an END instruction at the end
of the program.
(1) Read the error step with a
peripheral device, and correct the
program at that step.(Correct, for
example, by inserting a jump
destination, or making sure there is
only one jump destination.)
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