Mitsubishi L02CPU User Manual page 173

Turn on the backup start setup contact and then the backup start contact. Data are not backed up when only
the backup start contact is on.
Turn on the backup start setup contact.
Preparation for backup:
1) Set the CPU module to the STOP status.
2) Set the SD memory card so that the card
can be removed from the CPU module.
1) Check that the preparation for backup is
completed by the following methods.
Check the LEDs.
Check the special relay and special register.
(a) SM691 is on.
(b) 2h is stored in SD690.
2) Remove the SD memory card.
3) Insert an SD memory card for
storing backup data.
4) Turn on the backup start contact.
Check that the backup is completed by
the following methods.
Check the LEDs.
Check the special relay and special register.
(a) SM691 is on.
(b) 4h is stored in SD690.
*1 Since SM691 (Backup start preparation status flag) is on, data can be backed up again by turning off and then on the
backup start contact.
Back up data.
: Operation by the CPU module
: Operation by the user
CHAPTER 3 CPU MODULE FUNCTIONS
1
Check for backup error* .
Check the LEDs.
Check the special relay and special
register.
(a) SM691 is on.
(b) FFh is stored in SD690.
(c) An error cause is stored in SD689.
3
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