Omron CP1E Series User Manual page 27

2. Include programming to back up specified words in the DM Area to built-in EEPROM by turning
ON A751.15 (DM Backup Save Start Bit).
Execution condition
• Refer to 3-2 Memory Backup in the CP1E CPU Unit Software User's Manual (Cat. No. W480)
for other processing information.
• Check the ladder program for proper execution before actually running it on the Unit. Not checking
the program may result in an unexpected operation.
• The ladder program and parameter area data in the CP1E CPU Units are backed up in the backup
memory. The BKUP indicator will light on the front of the CPU Unit when the backup operation is
in progress. Do not turn OFF the power supply to the CPU Unit when the BKUP indicator is lit. The
data will not be backed up if power is turned OFF.
• With a CP1E CPU Unit, data memory can be backed up to backup EEPROM in the CPU Unit. The
BKUP indicator will light on the front of the CPU Unit when backup is in progress. Do not turn OFF
the power supply to the CPU Unit when the BKUP indicator is lit. If the power is turned OFF during
a backup, the data will not be backed up and will not be transferred to the DM Area in RAM the
next time the power supply is turned ON.
• Before replacing the battery, supply power to the CPU Unit for at least 30 minutes and then com-
plete battery replacement within 5 minutes. Memory data may be corrupted if this precaution is
not observed.
• The equipment may operate unexpectedly if inappropriate parameters are set. Even if the appro-
priate parameters are set, confirm that equipment will not be adversely affected before transfer-
ring the parameters to the CPU Unit.
• Before starting operation, confirm that the DIP switches are correctly set and that the contents of
the DM Area is correct.
• After replacing the CPU Unit, make sure that the required data for the DM Area, Holding Area, and
other memory areas has been transferred to the new CPU Unit before restarting operation.
• Do not attempt to disassemble, repair, or modify any Units. Any attempt to do so may result in mal-
function, fire, or electric shock.
• Confirm that no adverse effect will occur in the system before attempting any of the following. Not
doing so may result in an unexpected operation.
• Changing the operating mode of the PLC (including the setting of the startup operating mode).
• Force-setting/force-resetting any bit in memory.
• Changing the present value of any word or any set value in memory.
• When replacing parts, be sure to confirm that the rating of a new part is correct. Not doing so may
result in malfunction or burning.
• Do not touch the Expansion I/O Unit Connecting Cable while the power is being supplied in order
to prevent malfunction due to static electricity.
• Do not turn OFF the power supply to the Unit while data is being transferred.
• When transporting or storing Units or Board, static electricity can destroy LSIs or ICs. Cover the
PCBs with a conductive material and maintain the specified storage temperature.
• Do not touch circuit boards or the components mounted to them with your bare hands. There are
sharp leads and other parts on the boards that may cause injury if handled improperly.
• Double-check the pin numbers when assembling and wiring the connectors.
CP1E CPU Unit Hardware User's Manual(W479)
A751.15
Bit is turned ON to start
backup.
DM Backup Save
Start Bit
23