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Table 6.1 Error Code List for AnNCPU (Continue)
Error
Error
Code
Message
(D9008)
"WDT
25
ERROR"
(Checked
continuously)
"MAIN CPU
26
DOWN"
(Checked
continuously)
"UNIT
31
VERIFY
ERR. "
(Checked
continuously)
"FUSE
32
BREAK OFF"
(Checked
continuously)
"CONTROL-
40
BUS ERR. "
(Checked at
the execution
of FROM and
TO
instructions)
CPU
Error and Cause
States
Stop
The CPU is executing an
endless loop.
Stop
Main-CPU is out of control
or defective. (Sub-CPU
checked it.)
Stop
I/O module data are
or
different from those at
Contin
power-on.
ue
The I/O module (including
(set by
the special function module)
para-
is incorrectly loaded or has
meter)
been removed, or a
different unit has been
loaded.
Stop
A fuse is blown in an output
or
module.
Contin
ue
(set by
para-
meter)
The external output supply
for AnS output load is not
turned off or not connected.
Stop
The
FROM
instructions can-not be
executed.
Error of control bus with
special function module.
89
Corrective Action
Since the program is in an
endless lop due to the
JMP
instructions, check the
program.
Since this is a CPU
hardware error, consult
Mitsubishi representative.
(1) Among special registers
D9116 to D9123, the bit
corresponding to the
module of verify error is
"1". Therefore, use
peripheral equipment to
monitor the registers
and check for the
module with "1" and
make replacement.
(2) When the present unit
arrangement is OK,
perform reset with the
reset switch.
(1) Check the fuse blown
indicator LED of output
module and change the
fuse of module of which
LED is on.
(2) Among special registers
D9100 to D9107, the bit
corresponding to the
unit of fuse break is "1"
Replace the fuse of a
corresponding module.
Monitor and check it.
Check if the external power
supply for output load is
turned on or off.
Since this is a hardware
and
TO
error of a special function
module, CPU module, or
base unit, replace the
module and check the
defective module, consult
Mitsubishi representative.
and
CJ

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