Publication 1756-UM001E-EN-P - August 2002
25-2
Maintain the 1756-BA1 Battery
To estimate how long the battery will support the memory of the
controller:
A.
Determine the temperature (° C) 1 in. below the chassis.
B.
Determine the percentage of time that the controller is
powered
off
per week.
C.
Using “Table 25.A Worst-case estimates of battery life” on
page 25-3, determine the estimated worst-case battery life before
and after the BAT LED turns on.
D.
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
Determine the percentage of time that the
controller is powered off per week
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...