Omron SYSMAC CP Series, Руководство пользователя

Страница: 42 / 578

3 CPU Unit Operation
3-6
CP2E CPU Unit Software User’s Manual(W614)
Ladder programs and the parameter area are automatically backed up to and restored from the built-in
Flash Memory.
z
Backing Up Memory
Ladder programs and parameter area are backed up to the built-in Flash Memory by transferring
them from the CX-Programmer or writing them using online editing.
z
Restoring Memory
Ladder programs and parameter area are automatically transferred from the built-in Flash Memory
to the RAM memory when power is turned ON again or at startup.
Precautions for Safe Use
The BKUP indicator on the front of the CPU Unit turns ON when data is being written to the built-
in Flash Memory. Never turn OFF the power supply to the CPU Unit when the BKUP indicator is
lit.
Hold Area, Counter Area, DM Area and part of Auxiliary Area are automatically backed up to the built-in
non-volatile RAM. DM Area can be backed up to the built-in Flash Memory by using bits in the Auxiliary
Area.
* These areas will be cleared when the power supply is turned ON if the Clear retained memory area (HR/DM/CNT)
Check Box is selected in the PLC Settings.
3-2-2 Backing Up Ladder Programs and Parameter Area
3-2-3 I/O Memory Backup
Area
Backup to built-in
Flash Memory
Status at startup
CIO Area Not backed up. Cleared to all zeros.
Work Area (W)
Timer Area (T)
Index Register Area (IR)
Data Register Area (DR)
Holding Area (H) The values are retained immediately
before power interruption.*
Counter Area (C)
Auxiliary Area (A) Retained or not retained depending on
the address. The values of the retained
area are retained immediately before
power interruption.
DM Area
(D) Number of words start-
ing from D0 set in the
Number of CH of DM for
backup Box in the Star-
tup Data Read Area in
the PLC Settings. The specified number of words starting
from D0 is backed up by turning ON
A751.15 (DM Backup Save Start Bit). The specified number of words starting
from D0 is restored from the built-in
Flash Memory if the Restore D0- from
backup memory Check Box is selected in
the Startup Data Read Area in the PLC
Settings.
Ranges not given
above. Not backed up. The values are retained immediately
before power interruption.*