Rockwell Automation 1756-L6x_L7x ControlLogix System User Manual - Manual (Page 72)

72 Rockwell Automation Publication 1756-UM001O-EN-P - October 2014
Chapter 3 Start Using the Controller
Estimate the ESM Support
of the WallClockTime The ESM provides support for the maintenance of the WallClockTime of the
controller when power is not applied. Use this table to estimate the hold-up time
of the ESM based on the temperature of the controller and installed ESM.
To check the status of the ESM, see General Status Messages on page 186 .
Maintain the Battery (Only
1756-L6x Controllers) This section explains how to monitor and maintain the lithium batteries that the
ControlLogix controllers support.
For further information, see the Additional Resources section in the preface.
Check the Battery Status
When the battery is approximately 95% discharged, these low-battery warnings
are indicated:
• The BAT is solid red.
• A minor fault (type 10, code 10) is logged.
Hold-up Time (in days)
Temperature 1756-ESMCAP 1756-ESMNRM 1756-ESMNSE
20
°
C (68
°
F) 12 12 0
40 °C (104
°
F) 10 10 0
60
°
C (140
°
F) 7 7 0
IMPORTANT Any action that causes the 1756-L7x controller to reset (hard or soft), without
an ESM installed, results in the controller’s wal clock time of the controller
being reset to the factory default of 01/01/1998.
Table 6 - 1756-L6x Controllers and Compatible Batteries
Cat. No. Series Compatible Battery
1756-L61
1756-L62
1756-L63 A 1756-BA1
or
1756-BATA
or
1756-BATM
1756-L61
1756-L62
1756-L63
1756-L64
1756-L65 B 1756-BA2
1756-L63XT B