116
6220
• Since the standby system is in an
error or similar status in the
redundant system, the control system
cannot be switched to the standby
system.
• When an attempt was made to
execute system switching, the control
system could not be switched to the
standby system due to a network
error of the control system.
(This can be detected from the control
system of the redundant system.)
Check the standby system condition.
Q4AR
6221
Switching is disabled because of a bus
switching module error.
(This can be detected from the control
system of the redundant system.)
This is a bus switching module
hardware fault. (Contact your local
Mitsubishi representative.)
Q4AR
6230
The link module mounted on the
standby system CPU module is the
remote master station.
Check the system configuration status.
Error
Code
(SD0)
Error Contents and Cause
Corrective Action
Corresponding
CPU