Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 292

(d) Operation setting after restoration
At a time of restoration, whether to operate a CPU module with the state at backup or to operate with the initial
status can be set with bit15 of SD918 (Restoration function setting). If value of SD917 (Restoration target data
setting) is set to 1 (restoration target data is device data only), this setting is invalid since the device initial value
file or the module error collection file are not restored.
Item
Device initial value
Module error collection
*1 The setting is valid for the automatic restoration. As for the restoration by turning SM1929 on, the device initial value is
set when the CPU module is powered off and on or is switched STOP to RUN.
In the operation setting after restoration, the operation at the completion of the restoration is specified. Therefore, when the
CPU module is switched from STOP to RUN, the device value changes depending on the operating specifications of the
device memory at operating status change of the CPU module. (
290
Operation setting after restoration
Operate with the state at backup
(b15 of SD918 = On)
The device initial value is not set after
restoration.
The error history at backup is restored.
Operate with the initial status
(b15 of SD918 = Off)
The device initial value is set after
*1
restoration. (The device data at backup is
overwritten with the device initial value.)
The error history at backup is not restored.
Page 72, Section 2.5 (4))