Publication 1756-UM001E-EN-P - August 2002
26-2
Maintain a 1756-BATM Battery Module
Estimate Battery Life
When the battery is about 50 percent discharged, the controller
provides the following warnings:
•
On the front of the controller, the BAT LED turns on (solid red).
•
A minor fault occurs (type 10, code 10).
To estimate how long the battery will support the memory of the
controller:
1.
Determine the temperature (° C) 1 in. below the battery module.
2.
Determine the percentage of time that the controller is
powered
off
per week.
4.
Using “Table 26.1 Worst-case estimates of life for the 1756-BATA
battery” on page 26-3, determine the estimated worst-case
battery life before and after the BAT LED turns on.
5.
For each year of battery life, decrease the time before the BAT
LED turns on by the percentage that is shown in the table. (Do
not decrease the time after the BAT LED turns on.)
EXAMPLE
If a controller is off:
•
8 hr/day during a 5-day work week
•
all day Saturday and Sunday
Then the controller is off 52% of the time:
1. total hours per week = 7 x 24 = 168 hours
2. total off hours per week = (5 days x 8 hr/day)
+ Sa Sunday = 88 hours
3. percentage off time = 88/168 = 52%
Summary of Contents for controllogix 1756-L63
Page 1: ...ControlLogix System 1756 L1 L1Mx L55Mxx L63 User Manual Allen Bradley HMIs...
Page 4: ...Publication 1756 UM001E EN P August 2002 Summary of Changes 2 Notes...
Page 16: ...Publication 1756 UM001E EN P August 2002 Table of Contents x...
Page 268: ...Publication 1756 UM001E EN P August 2002 15 4 Monitor Connections Notes...
Page 276: ...Publication 1756 UM001E EN P August 2002 16 8 Communicate with a DeviceNet Device Notes...
Page 402: ...Publication 1756 UM001E EN P August 2002 24 22 Program Motion Control Notes...
Page 408: ...Publication 1756 UM001E EN P August 2002 25 6 Maintain the 1756 BA1 Battery Notes...
Page 418: ...Publication 1756 UM001E EN P August 2002 B 2 Estimate Execution Time...
Page 420: ...Publication 1756 UM001E EN P August 2002 C 2 Estimate Memory Use...
Page 422: ...Publication 1756 UM001E EN P August 2002 D 2 Determine When Data Is Updated Notes...
Page 424: ...Publication 1756 UM001E EN P August 2002 E 2 Reconfigure an I O module Notes...
Page 428: ...Publication 1756 UM001E EN P August 2002 4 Index...
Page 429: ...Publication 1756 UM001E EN P August 2002 Index 5 Allen Bradley HMIs...
Page 430: ...Publication 1756 UM001E EN P August 2002 6 Index...
Page 435: ...ControlLogix System User Manual Allen Bradley HMIs...