Mitsubishi Electric FX5 User Manual page 177

Restoration of the special relay and special register
The setting for whether or not to restore the special relays and special registers differs according to the restoration function
being executed.
■For restoration triggered by turning SM1354 ON, and automatic restoration using SD955
Set with SD955 (restoration function setting) b14 (special relay, special register restoration).
b14 of SD955
OFF
ON
■Restoration by CPU module auto exchange
The special relay and special register are restored based on the system file for CPU module auto exchange function, so a
setting is not required. (Page 168 Restoration of the special relay and special register)
■Special relays and special registers that are not restored
Even when restoration is executed, the following special relays and special registers are not restored.
• SM953 (Data backup error check flag)
• SM959 (Data restoration error check flag)
• SM1350 (Data backup status flag)
• SM1351 (Data backup execution request)
• SM1353 (Data restoration status flag)
• SM1354 (Data restoration execution request)
• SM8492 (IP address storage area write request)
• SM8495 (IP address storage area clear request)
• SD953 (Backup error cause)
• SD959 (Restoration error cause)
• SD1350 (Number of uncompleted folders/files of CPU module data backup/restoration)
• SD1351 (Progression status of CPU module data backup/restoration)
Initialization during automatic restoration.
When executing automatic restoration with SD955, set whether or not to initialize the drives other than the SD memory card
with SD955 (restoration function setting) b1 (initialize during automatic restoration). This function is valid only when SD954
(restoration target data setting) is 0 (all target data).
b1 of SD955
OFF
ON
Setting of operation after restoration
Set whether after restoration the CPU module operation is to continue from the backup state or from the initialized state with
SD955 (restoration function setting) b15 (setting of operation after restoration).
Item Setting of operation after restoration
Continue operation from backed up state (b15 of
SD955 = ON)
Initial device value Do not set device initial values after restoration.
Event history Set event history during backup.
If SD954 (restoration target data setting) value is 1 (restoration target data is only device/label data), the device initial value
file and event history file are not restored so this setting is invalid. This setting is also invalid during restoration with CPU
module auto exchange.
Restoration target data setting
The special relay and special register are not restored.
The special relay and special register are restored.
Restoration target data setting
Do not initialize.
Initialize.
Operate from initialized state (b15 of SD955 =
OFF)
Set device initial values after restoration. (Device data from
backed up state is overwritten with device initial values.)
Do not set backup event history, and create new file.
22 DATA BACKUP/RESTORATION FUNCTION
22.2 Restoration Function
22
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