15 CPU MODULE DATA BACKUP/RESTORATION FUNCTION
15.2 Restoration Function
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15
Restoration processing triggered by turning on SM1354
Backup data is restored at a desired timing.
Use the restoration function by turning on SM1354 to check the backup data and to test before actual
operation.
To operate the system using the backup data, use the automatic restoration with SD955. ( Page 282
Automatic restoration using SD955)
The restoration processing triggered by turning on SM1354 (CPU module data restoration execution request)
can be executed only when the CPU module is the STOP state.
Operating procedure
1. Set restoration target data with SD954 (Restoration target data setting).
2. Set restoration target folders with SD956 (Restoration target date folder setting) to SD958 (Restoration target number
folder setting). (These settings are not required when the bit 13 of SD955 (Restoration function setting) is on.)
3. Set each setting with the bit 13 to 15 of SD955.
4. Set the CPU module to the STOP state.
5. Turn on SM1354.
If the restoration processing is completed with an error and SM959 (CPU module data restoration error check flag) turns on,
check SD959 (Restoration error cause), take actions, and then restore the data again as required.
The execution status of the restoration processing can be checked in SD1350 (Number of uncompleted
folders/files of CPU module data backup/restoration) and SD1351 (Progression status of CPU module data
backup/restoration). ( Page 833 List of Special Register Areas)
(1) A restoration execution request is sent.
(2) The system turns on SM1353 (CPU module data restoration status flag).
(3) The system turns off SM1354 after the restoration processing is completed.
(4) The system turns off SM1353.
ON
SM1354
OFF
END END END END ENDEND ENDEND END
ON
OFF
(1)
(3)
(2)
(4)
SM1355
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