Mitsubishi Electric MELSEC QS SERIES User Manual page 124

9
TROUBLESHOOTING
Error Error
classification item
0404
0427
0735
450
0908
0911
9
- 26 9.5 Error Code List
Name
External power supply
error
Output drive power supply
status error
Module technical version
combination invalid
Error history reading
status record
Module forced stop control
Error definition
Voltage error or hardware failure of external
power supply.
The output driver power supply is in the
invalid shutdown/supply status.
The module technical version set by a
parameter cannot be used in combination
with that of the module.
Record of error history reading status.
The error history reading was attempted in
the status where no error history exits.
Once a new error code is stored, this error
code will not be read from the histroy.
There are two error histories for MPU A and
MPU B, and this code is output when either
of them has no error history data.
When both of them have no error history
data, two codes are output.
The operation of the safety remote I/O
module has stopped by receiving a forced
stop command from the master module.
Module forced stop control.
However, errors received after an error is
sent are eliminated.
However, errors received after an error is
sent or errors received at the time of reading
error history are eliminated.
Corrective action
(1) Check the
connected
devices, wiring,
and voltage.
(2) Replace the safety
remote I/O module.
(1) Reexamine the
connecting devices
and wiring.
(2) Adjust the timing
of the external
power supply ON
to the timing of
module power
supply ON.
(1) Change the
parameter setting
to the original
module technical
version.
Use the module as is,
since it is normal.
Refer to the error
history of the safety
CPU module/safety
master module.