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3.32 Battery Life-Prolonging Function
This function extends battery life of the CPU module by limiting data to retain by a battery to clock data only. The use of
this function initializes all data other than the clock data when the CPU module is powered off or is reset.
(1) Setting procedure
Enter 0001
H
under Switch3 in the "Switch Setting for I/O and Intelligent Function Module" dialog box.
Project window [Parameter] [PLC Parameter] [I/O Assignment] [Switch Setting]
For the life of battery installed in the CPU module when the battery life-prolonging function is used, refer to the
following.
MELSEC-L CPU Module User's Manual (Hardware Design, Maintenance and Inspection)
Data retained by a battery Description
Error history The number of error history data are initialized to zero.
Latch relay (L) Cleared to zero.
Device in the latch range Cleared to zero.
Files in the standard RAM
Files are deleted. (Files are created again at power-on or reset.)
Data are cleared to zero.
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