16-11
16 Other Functions
CP2E CPU Unit Software User’s Manual(W614)
16-3 DM Backup Function
16
16-3-2 Procedure
Perform the following procedure to save the DM data to the built-in Flash Memory during operation or
while stopped.
1
Check the Restore D0- from backup memory Check Box in the Startup Data Read Area of the
PLC Setup from the CX-Programmer.
Also, set the number of words to be backed up starting from D0 in the Number of CH of DM for
backup Box. Transfer the PLC Setup to the CPU Unit and turn ON the power supply.
2
Turn ON A751.15 (DM Backup Save Start Bit) from the CX-Programmer, a Programmable Ter-
minal (PT), or a ladder program.
The specified number of words in the DM Area starting from D0 will be backed up to the built-in
Flash Memory.
• Using a Ladder Program
When the saving operation has been completed, A751.14 (DM Backup Save Flag) will turn OFF.
16-3-2 Procedure
Execution condition
A751.15
DM Backup Save
Start Bit
DM Backup Save
Start Bit
(A715.15)
ON
One cycle
Backup started Backup finished
OFF
ON
OFF
DM Backup Save
Flag
(A751.14)
Execution Bit is turned ON to start backup.
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