Mitsubishi Q01CPU User Manual page 563

12
TROUBLESHOOTING
Error code
Error item
(Hexadecimal)
421D
H
Online module
421E change-related
H
error
421F
H
4240
H
4241
H
4242
H
4243
H
4244
H
Redundant
system-related
error
4245
H
4246
H
4247
H
12.3.11 Error codes returned to request source during communication with CPU module
Table12.12 Error code
Error details
System switching occurs during the online
module change.
The information of the online module change
cannot be sent to the standby system. When
the system switching occurs during the online
module change, the online module change
may not be continued.
The module mounted on the extension base
unit cannot be replaced online when the
connection destination is set to the standby
system in the separate mode.
Any of the following unsupported operations
was executed for the standby system.
• Operation mode change
• System switching
• Memory copy from control system to
standby system
Communication cannot be made since the
standby system has been powered off or reset
or is in a user watchdog timer error or CPU
module hardware fault status.
Communication with the standby system
cannot be made since the tracking cable is
faulty or disconnected.
The command cannot be executed since the
standby system is in stop error.
The command cannot be executed since the
operation status differs from that of the
standby system.
Other system CPU module status error
The command cannot be executed since
operation mode (separate/backup) change or
system (control/standby system) switching is
being executed.
Memory copy from control system to standby
system is already being executed.
Corrective action
Connect GX Developer to the new control system and
check the status of the online module change. According
to the status of online module change, take procedures
for it.
The tracking cable may be faulty or the standby system
may have an error.
• Check the mounting status of the tracking cable or
replace the tracking cable.
• Check the status of the standby system. When a stop
error was detected by the standby system, perform
troubleshooting.
• Set the connection destination of a programming tool
to the present control system.
• Perform the online module change to the module
mounted on the extension base unit again.
Execute the operation again after changing the transfer
setup to the control system.
Request communication after powering on the standby
system or setting its Reset switch to the neutral position.
Cannot be executed since the tracking cable is
disconnected or faulty. Execute again after checking the
tracking cable for disconnection or changing it for a
normal one.
Execute again after removing the stop error of the
standby system.
Execute again after placing the standby system in the
same operation status (RUN/STOP) as the control
system.
Check that the other system CPU module has normally
started up and that the tracking cable is connected.
Execute again after the operation mode change or
system switching being executed is completed.
Execute again after memory copy from control system to
standby system is completed.
Check the following and take corrective action.
• Is SM1596 of the control system or standby system
ON?
(ON: Memory copy being executed)
Execute again after SM1596 has turned OFF since it is
turned OFF by the system on completion of memory
copy.
• Is SM1597 of the control system ON?
(ON: Memory copy completed)
Execute again after turning OFF SM1597 of the control
system.
12.3 Error Code List
9
10
11
12
12
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