Chapter 7 Memory Card
7.8 Restoration Starts Once CPU is supplied with Power
When the backup file in the memory card is consistent with the specific path and file name, the CPU can
perform restoration once it is supplied with power. During restoration, the CPU LED and Error LED blinks
alternatively and SM452 flag is ON. After restoration is done, the CPU LED and Error LED stops blinking and
SM452 flag is OFF.
Operation Steps:
(1) Set up the backup file path and file name for the memory card backup file. The filename of the backup file
is
BACKUP.dup
and the backup file paths are shown below.
DVP-ES3: Memory card root directory\SDCard\PLC CARD\ES3\SysDup\ES3_BACKUP.dup
DVP-EX3: Memory card root directory\SDCard\PLC CARD\ES3\SysDup\EX3_BACKUP.dup
DVP-SV3: Memory card root directory\SDCard\PLC CARD\ES3\SysDup\SV3_BACKUP.dup
DVP-SX3: Memory card root directory\SDCard\PLC CARD\ES3\SysDup\SX3_BACKUP.dup
(2) Insert the memory card into the card slot when the CPU power is off.
(3) When the CPU power is on, it automatically checks if the memory card data is consistent with the PLC
data. If not, the restoration begins. The data check is specifically on the data in CPU programs and
HWCONFIG parameters.
(4) During the restoration, the CPU LED and Error LED blinks alternatively. Once the restoration is done, the
blinking stops.
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