Rockwell Automation 1756-L6x_L7x ControlLogix System User Manual - Manual (Page 74)

74 Rockwell Automation Publication 1756-UM001O-EN-P - October 2014
Chapter 3 Start Using the Controller
1756-BATM Battery Module and Battery Life
Use the 1756-BATM battery module with any 1756-L6 x/A controller. The
battery module is highly recommended for higher-memory controllers.
When the 1756-BATA battery within the 1756-BATM module is approximately
50% discharged, these low-battery warnings are indicated:
• The BAT is solid red.
• A minor fault (type 10, code 10) is logged.
Table 7 - Worst-case Estimates of 1756-BA1 Battery Life
Temperature Battery Life Before BAT Status Indicator Turns On Battery Life After BAT Status
Indicator Turns On and Power is Off
Power Off 100% Power Off 50% Yearly Decrease
60 °C (140 °F) 22 days 43 days 23% 6 hrs
25 °C (77 °F) 21 days 42 days 17% 28 hrs
0 °C (32 °F) 14 days 28 days 17% 2.5 days
Table 8 - Worst-case Estimates of 1756-BATA Battery Life
Temperature Battery Life Before BAT Status Indicator Turns On Battery Life After BAT Status
Indicator Turns On and Power is Off
Power Off 100% Power Off 50% Yearly
Decrease
60 °C (140 °F) 98 days 204 days 11% 104 days
25 °C (77 °F) 146 days 268 days 5% 157 days
0 °C (32 °F) 105 days 222 days 6% 113 days
IMPORTANT If your project is not stored in nonvolatile memory, the use of the battery
module is highly recommended.