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15 CPU MODULE DATA BACKUP/RESTORATION FUNCTION
15.2 Restoration Function
Operation setting after restoration
As an operation after the restoration processing, set whether to operate the CPU module in the status at the backup
processing or to operate the CPU module in the initial status with the bit 15 of SD955. The following table lists the operations
of each item to be performed according to the operation setting after restoration.
*1 When the firmware version of the CPU module at the backup processing is different from that of at the restoration processing, the SFC
program will be started from the block 0 and step 0 regardless of the operation setting after the restoration.
Note that this setting is invalid since the device initial value file, initial global label value file, initial local label value file, event
history file, and SFC program are not restored when the value in SD954 (Restoration target data setting) is 1 (restoration
target data are only device/label data).
For the operation setting after restoration, specify the operation at a completion of restoration.
When the CPU module is switched from STOP to RUN, values of devices are changed according to the
operation of the device memory at an operating status change of the CPU module. ( Page 88 Operation
Processing When Operating Status Is Changed)
Item Operation setting after restoration
Operating the CPU module in the status at
data backup
(bit 15 of SD955 = On)
Operating the CPU module in the initial status
(bit 15 of SD955 = Off)
Device initial value The device initial value is not set after the restoration
processing.
The device initial value is set after the restoration
processing. (The device data at data backup will be
overwritten with the device initial value.)
Initial values of global/local labels The initial values of global/local labels are not set after
the restoration processing.
The initial values of global/local labels are set after the
restoration processing. (The label data at data backup
will be overwritten with the initial value of the initial global/
local value.)
SFC program
*1
When "Resume Start" was selected before data backup,
the SFC program is resumed after restoration
processing.
The SFC program is not resumed after restoration
processing even though "Resume Start" was selected
before data restoration.
Event history The event history at data backup is set. The event history at data backup is not set, a new file is
created and a restoration event is registered.
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