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3 CPU Unit Operation
CP2E CPU Unit Software User’s Manual(W614)
3-2 Backing Up Memory
3
3-2-4 Initializing I/O Memory at Startup
For CP2E CPU Units, the held areas in I/O memory (Holding Area, Counter PVs, Counter Completion
Flags and DM Area) are automatically retained in the built-in non-volatile RAM with no battery installed.
Use the following way to clear these areas when the power supply is turned ON.
z Clearing All Held Areas to Zero at Startup
Select the Clear retained memory area (HR/DM/CNT) Check Box in the PLC Settings.
Note If the Restore D0- from backup memory Check Box is selected, only the specified words in the DM Area will
be restored from the built-in Flash Memory when the power supply is turned ON.
3-2-4 Initializing I/O Memory at Startup
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