Mitsubishi A1SH User Manual

11 - 14
TROUBLESHOOTING11.
Table 11.1 AnSHCPU Error Code List (Continue)
Error Message
Error
Code
(D9008)
Detailed
Error
Code
(D9092)
CPU
module
status
Error and Cause Corrective Action
"ROM ERR"
(Checked at
power-on.)
17 — Stop Parameters and/or sequence programs
are not correctly written to the mounted
memory cassette.
(1) Correctly write parameters and/or
sequence programs to the memory
cassette.
(2) Remove the memory cassettes that
contain no parameters or sequence
programs.
Parameters stored in the memory
cassette have exceeded the limit of
available program capacity.
Ex.) Default parameters (program
capacity: 6k steps) are written to
A1NMCA-2KE.
(1) Adjust the program capacity for
parameters to the memory cassette
used.
(2) Use the memory cassette of which
memory capacity is larger than the
program capacity for parameters.
"RAM ERROR"
(Checked at
power-on.)
20 — Stop The CPU has checked if write and read
operations can be performed properly to
the data memory area of CPU, and as a
result, either or both has not been
performed.
Since this is CPU hardware error,
consult Mitsubishi representative.
"OPE. CIRCUIT
ERR"
(Checked at
power-on.)
21 — Stop The operation circuit, which performs
the sequence processing in the CPU,
does not operate properly.
"WDT ERROR"
(Checked at
END
instruction.)
22 — Stop Scan time exceeds watch dog error
monitor time.
(1) Scan time of user program has been
exceeded for some conditions.
(2) Scan time has increased due to
instantaneous power failure which
occurred during scan.
(1) Calculate and check the scan time of
user program and reduce the scan
time using the CJ instruction or the
like.
(2) Monitor the content of special regis-
ter D9005 by use of peripheral
equipment. When the content is
other than 0, line voltage is insuffi-
cient. When the content is other than
0, the power voltage is unstable.
"END NOT
EXECUTE"
(Checked at
END
processing.)
24 — Stop (1) AnSHCPU has read other instruction
code due to noise at the
instruction execution.
(2) The instruction has changed to
another instruction code for some
reason.
Reset and run the CPU module again. If
the same error persists again, it is the
CPU hardware error, consult Mitsubishi
representative.
"WDT ERROR" 25 — Stop The instruction or the like causes a
loop in execution of the sequence pro-
gram to disable execution of the
instruction.
Check the program for an endless loop
and correct.
"UNIT
VERIFY ERR."
31 — Stop
(Continue)
I/O module data are different from those
at power-on.
(1) The I/O module (including the spe-
cial function module) is incorrectly
loaded or has been removed, or a
different unit has been loaded.
(1) The bit in special registers D9116 to
D9123 corresponding to the module
causing the verification error is “1.”
Use a peripheral device to monitor
the registers to locate the “1” bit, and
check or replace the corresponding
module.
(2) To accept the current module
arrangement, operate the RUN/
STOP key switch to reset.
END
END
CJ
END

Mitsubishi A1SH Specifications

General

Brand	Mitsubishi
Model	A1SH
Category	Controller
Language	English