Omron SYSMAC CP Series, User Manual

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CP2E CPU Unit Software User’s Manual(W614)
Precautions for Safe Use
Observe the following precautions when using a CP-series PLC.
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Handling
• Set the Unit properly as specified in the operation manual. Improper setting of the Unit may result
in malfunction.
• Check that the DIP switches and data memory (DM) are properly set before starting operation.
• To initialize the DM Area, back up the initial contents for the DM Area to the built-in Flash Memory
using one of the following methods.
• Set the number of words of the DM Area to be backed up starting with D0 in the Number of CH
of DM for backup Box in the Startup Data Read Area.
• Include programming to back up specified words in the DM Area to the built-in Flash Memory
by turning ON A751.15 (DM Backup Save Start Bit).
• Check the ladder program for proper execution before actually running it on the Unit. Not checking
the program may result in an unexpected operation.
• Transfer a routing table to the CPU Unit only after confirming that no adverse effects will be
caused by restarting CPU Bus Units, which is automatically done to make the new tables effec-
tive.
• The ladder program and parameter area data in the CP2E CPU Units are backed up in the built-in
Flash Memory. The BKUP indicator will light on the front of the CPU Unit when the backup opera-
tion 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 and a memory error will occur the next
time the power supply is turned ON.
• With a CP2E CPU Unit, data memory can be backed up to the built-in Flash Memory. 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.
• Install a battery (sold separately), if you are using clock data for the program. If the battery is not
installed, the clock data will be initialized when the power is turned off, and the program may
cause malfunction.
• When using a battery, set it to “Detect Low Battery” in PLC settings. If the setting is not changed,
a program that uses clock data may cause malfunction, when the battery is exhausted.
• Before replacing the battery, supply power to the CPU Unit for at least 3 0 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 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.