Mitsubishi Electric Q01UCPU User Manual page 266

(c) Operations of the special relay and special register
The following figure shows the operations of SM609 (Memory card remove/insert enable flag), SM691 (Backup
start preparation status flag), and SD690 (Backup status).
Before backup start Backup start prepared
*2
SM609
(Memory card
ON
remove/insert
OFF
enable flag)
SM691
ON
(Backup start
OFF
preparation
status flag)
SD690
(Backup status)
*1 For details of the special relay and special register used for this function, refer to the following.
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
*2 This special relay is turned on/off by the system.
(d) Operating status of the CPU module
After END processing where the backup start setup request is accepted, the CPU module changes its
operating status to STOP. Data can be backed up regardless of the operating status. After the data backup
processing ends, power off and then on or reset the CPU module. (If only the RESET/STOP/RUN switch is
moved to RUN without power-on or reset, the operating status of the CPU module remains in STOP.)
Before backup start
CPU operating
RUN/STOP
status
/PAUSE
*1 The status includes a stop error.
264
Backup start setup request from
the programming tool or the backup
start setup contact is turned on.
1
0
Backup start setup request from
the programming tool or the backup start
setup contact is turned on.
Backup start prepared
*1
*1
Backup start request from
the programming tool or the backup
start contact is turned on.
Backup start
preparation completed Backup in execution
2
Backup start request from
the programming tool or the backup
start contact is turned on.
Backup start
preparation completed Backup in execution
*1
STOP
Backup completed
3
4
Backup completed