Specifying Hold Areas; Lifetime Of The Backup Battery - Panasonic FPS Series User Manual

FPΣ User's Manual
4. Choose "Enable" in the list box of item no. 4 "Battery error indication"

6.8.3 Specifying Hold Areas

If no battery is installed, only the fixed hold areas (default address ranges of system registers
6 to 14) will be saved when the PLC is turned off. With the optional backup battery it is
possible to save additional hold areas.
Procedure
1. Double-click "PLC" in the navigator
2. Double-click "System Registers"
3. Double-click "Hold On/Off"
Enter the desired values for hold areas in system registers no. 6 to 14. (For
internal relays and data registers, a dialog box opens in which you can adjust the
values.)
CAUTION
Do not change the default values if no battery is installed. If the battery is empty
or no battery is present and additional hold areas have been defined, the
hold/non-hold operation becomes unstable.

6.8.4 Lifetime of the Backup Battery

The backup battery will eventually die. Therefore it is important to replace it periodically. Refer
to the table below as a guide for when to replace the battery.
Item Description
220 days or more if no power at all is supplied (typical lifetime in actual use: approx. 840
days at 25°C/70°F)
Battery life
Suggested replacement interval: 1 year
6.8 Backup Battery
97