Mitsubishi MELSEC-A series, Programming Manual

Page: 369 / 508

9 - 3
ERROR CODE LIST 9.
Table 9.1 Error Code List for the An, AnN, A3H, A3M, A3V, A0J2H, AnS, A2C, A73, A52G, A1FX and A3N board (Continue)
Error Message
Error Code
(D9008)
CPU States Error and Cause Corrective Action
"CASSETTE
ERROR"
(Checked at
power-on)
An, AnN only
16 Stop The memory cassette is not loaded. Turn off the power, insert the memory
cassette and turn on the power again.
"ROM ERR" 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 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 the
execution of END
processing)
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 lengthened 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
instruction or the
like.
(2) Monitor the content of special
register D9005 by use of peripheral
equipment. When the content is
other than 0, line voltage is
insufficient. When the content is
other than 0, the power voltage is
unstable.
"SUB-CPU
ERROR"
(Checked
continuously)
23
(During run)
26
(At power-on)
Stop
Sub-CPU is out of control or defective. Since this CPU hardware error, consult
Mitsubishi representative.
"END NOT
EXECUTE"
(Checked at the
execution of END
instruction)
24 Stop (1) When the instruction was to be
executed, the instruction was read
as other instruction code due to
noise or the like.
(2) The instruction has changed to
another instruction code for some
reason.
Perform reset and run.
If the same error is displayed again, it is
the CPU hardware error, consult
Mitsubishi representative.
"WDT ERROR"
(Checked
continuously)
25 Stop The CPU is executing an endless loop. Since the program is in an endless lop
due to the
and instructions,
check the program.
"MAIN CPU
DOWN"
(Checked
continuously)
26 Stop Main-CPU is out of control or defective.
(Sub-CPU checked it.) Since this is a CPU hardware error,
consult Mitsubishi representative.
CJ
END
END
JMP
CJ