Mitsubishi Electric MELSEC iQ-R Series User Manual page 320

Operating procedure (when date and time are specified)
Data is automatically backed up on the specified date and time.
1.
Set the upper limit value for the number of CPU module backup data. (The setting method and operating procedure for
the upper limit value are the same as those for the upper limit value for the backup processing triggered by turning on
SM1351.) ( Page 316 Operating procedure)
2.
Set the date and time with SD947 to SD949.
Special register
SD947
SD948
SD949
3.
To retry the automatic backup, turn on the bit 10 of SD944 (Backup function setting). For the retry of the automatic
backup, refer to the following.
Page 317 Retrying the automatic backup
4.
Turn on the bit 0 of SD944.
If the backup processing is completed with an error and SM953 (CPU module data backup error check flag) turns on, check
SD953 (Backup error cause), take actions, and then back up the data again as required.
• In months that does not have the specified date, the automatic backup is not executed. For example, when
SD947 has been set to "31", the months when the automatic backup is executed are January, March, May,
July, August, October, and December.
Operating procedure (when time and day of the week are specified)
Data is automatically backed up on the specified time on the specified day of the week.
1.
Set the upper limit value for the number of CPU module backup data. (The setting method and operating procedure for
the upper limit value are the same as those for the upper limit value for the backup processing triggered by turning on
SM1351. ( Page 316 Operating procedure))
2.
Set the time and day of the week with SD950 to SD952.
Special register
SD950
SD951
SD952
3.
To retry the automatic backup, turn on the bit 10 of SD944 (Backup function setting). For the retry of the automatic
backup, refer to the following.
Page 317 Retrying the automatic backup
4.
Turn on the bit 1 of SD944.
If the backup processing is completed with an error and SM953 turns on, check SD953, take actions, and then back up the
data again as required.
22 CPU MODULE DATA BACKUP/RESTORATION FUNCTION
318
22.1 Backup Function
Description
Set the date when the data is to be automatically backed up.
Set the time (hour) when the data is to be automatically backed up.
Set the time (minute) when the data is to be automatically backed up.
Description
Set the time (hour) when the data is to be automatically backed up.
Set the time (minute) when the data is to be automatically backed up.
Set the day of the week when the data is to be automatically backed up.
b0: Sunday, b1: Monday, b2: Tuesday, b3: Wednesday, b4: Thursday, b5: Friday, b6: Saturday