Mitsubishi Electric Melsec A Series, Руководство пользователя

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89
Table 6.1 Error Code List for AnNCPU (Continue)
Error
Message
Error
Code
(D9008)
CPU
States
Error and Cause Corrective Action
"WDT
ERROR"
(Checked
continuously)
25 Stop The CPU is executing an
endless loop. Since the program is in an
endless lop due to the
JMP and CJ
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.
"UNIT
VERIFY
ERR. "
(Checked
continuously)
31 Stop
or
Contin
ue
(set by
para-
meter)
I/O module data are
different from those at
power-on.
The I/O module (including
the special function module)
is incorrectly loaded or has
been removed, or a
different unit has been
loaded. (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.
A fuse is blown in an output
module. (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.
"FUSE
BREAK OFF"
(Checked
continuously)
32 Stop
or
Contin
ue
(set by
para-
meter)
The external output supply
for AnS output load is not
turned off or not connected. Check if the external power
supply for output load is
turned on or off.
"CONTROL-
BUS ERR. "
(Checked at
the execution
of FROM and
TO
instructions)
40 Stop
The FROM and TO
instructions can-not be
executed.
Error of control bus with
special function module.
Since this is a hardware
error of a special function
module, CPU module, or
base unit, replace the
module and check the
defective module, consult
Mitsubishi representative.