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CHAPTER6 FUNCTIONS
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6.26 Battery Life-prolonging Function
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6.26 Battery Life-prolonging Function
(1) Definition
This function extends the life of battery installed in the CPU module by restricting data to be held by the battery to
clock data only.
This function initializes all data other than the clock data when the CPU module is powered off or is reset.
(2) Setting
Set the function in the I/O assignment tab of the PLC parameter dialog box.
1) Configure the I/O assignment setting.
2) Click the
button.
3) Enter 0001
H
to the switch 3 of the slot where the CPU module is mounted (When entering the value to a slot
in another station, the value is ignored).
(3) Battery life
For the life of battery installed in the CPU module when the battery life-prolonging function is used, refer to the
following.
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
Table6.44 Initialization details
Data held by a battery Description
Error history The number of error history data is initialized to zero.
Latch device (L) Cleared to zero.
Device in the latch range Cleared to zero.
Standard RAM Formatted (cleared to zero).
File register assigned to
the standard RAM
Set "Use the same file name as the program." A file is deleted.
Set "Use the following file".
A file is deleted (A file is recreated at power-on or reset
(Data is cleared to zero.).)
Figure 6.107 Switch setting screen
Switch setting
Enter 0000H.