FP2/FP2SHFP2/FP2SH Operation
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6.1 FP2 Operation
6.1.1.2 Retaining the Data During Power Outages
For the operation memory, such as that for internal relays and data registers, the data
that is set as hold-type memory is backed up by the backup battery.
Note
If the internal relays and data registers are set to be non-hold
type, then they will not be saved.
Battery-less operation
During ROM operation, if it is not necessary to retain the internal relays and data regis-
ters, then you can set them all to non-hold type and perform operation without a backup
battery.
6.1.1.3 Setting the Battery Error Warnings
Under normal conditions, if an error occurs with the backup battery, the BATT. and ER-
ROR LEDs on the front of the CPU are on for battery error warning. With ROM operation
that does not require the backup battery for operation memory, it is possible to set it so
that this warning is not given. With this setting, the BATT. and ERROR LEDs do not light.
Method
The programming tool software is required in order for this setting to be effective.
Procedure:
1. On the “Option” menu, select “PLC Configuration”.
2. Select “Initial Switch” tab.
3. Check “Alarm battery error” off.
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