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2) Operating procedure
Turn on in the order of the backup start setup contact and the backup start contact. Data are not backed up
when only the backup start contact is on.
*1: Since the SM691 (Backup start preparation status flag) is on, data can be backed up again by turning off and then on the
backup start contact.
Figure 6.115 Backup procedure using contacts
Turn on the backup start setup contact.
Preparation for backup:
1) Set the CPU module to the STOP status.
2) Stop an operation that uses a memory
card so that the card can be removed.
Back up data.
: Operation by the CPU module
: Operation by the user
Check the backup error
*1
.
Check the LEDs.
Check the special relay and special
register.
(a) SM691 is on.
(b) SD690 stores FFh.
(c) SD689 stores the error cause.
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) SD690 stores 2h.
2) Remove the mounted memory card.
3) Mount a memory card for storing backup data.
4) Turn on the backup start setup 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) SD690 stores 4h.