INSTALLATION
3-14
Hardware
and Installation User Manual
3.4.4 Selecting
Battery Backup — TI535 Models
Switch 1 on the second dipswitch assembly (DIP 2) enables or disables the
battery backup function. With the battery backup enabled, cycling power does
not
alter the following information:
RLL program
T
imer/counter preset and current values
Drum preset preset and current values
W
ord I/O values
V
ariable (V) memory values
Retentive control relay status
States of forced I/O
Scan time
I/O Configuration data
If you power up a TI535 with the battery backup dipswitch turned OFF and
have
not installed an EPROM/EEPROM, the PLC clears memory
.
If you are powering up a TI535 for the first time, turn off the
battery backup and do not install a programmed
EPROM/EEPROM. This ensures that the PLC is properly
initialized.
Refer to Figure 3-11. Push Switch 1 LEFT to enable the battery backup. Push
switch 1
RIGHT to disable battery backup.
DIP
2
PUSH LEFT
PUSH RIGHT
Battery
Battery
enable
disable
Figure 3-11 Switch Settings — TI535 Battery Backup
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