Siemens SIMATIC TI525 - Selecting Battery Backup - TI525 Models; Switch Settings - TI525 Battery Backup

INSTALLATION
3-7
Hardware and Installation User Manual
3.3.2 Selecting Battery Backup — TI525 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 TI525 without a good battery installed or with the battery
backup
dipswitch turned OFF , the PLC clears memory .
To allow for battery replacement, the TI525 is designed to retain memory for at
least 10 minutes while powered down, even with a bad battery. If the PLC is
powered down without a good battery for longer than 10 minutes, at power -up
the PLC detects whether or not memory is valid. If memory is not valid, then the
PLC clears memory upon power -up.
Refer to Figure 3-5. T urn switch 1 ON to enable the battery backup. T urn switch
1 OFF to disable battery backup.
DIP 2
ONOFF
Battery enable Battery disable
Position not
selected
Position
selected
Push down
Figure 3-5 Switch Settings — TI525 Battery Backup

Switches 2, 3, 6, 7, and 8 on DIP 2 are reserved for factory
testing. Switches 2 and 3 should be turned off. The position of
switches 6, 7, and 8 do not matter for normal operation.
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.comArtisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com