Release Notes
ControlLogix Enhanced Redundancy System, Revision
20.055_kit2
Redundancy Module Catalog Numbers
1756-RM, 1756-RMXT, 1756-RM2, 1756-RM2XT
Controller Catalog Numbers
1756-L61, 1756-L62, 1756-L63, 1756-L63XT, 1756-L64, 1756-L65, 1756-L71, 1756-L72, 1756-L73, 1756-L73XT,
1756-L74, 1756-L75
Communication Module Catalog Numbers
1756-CN2/B, 1756-CN2R/B, 1756-CN2RXT/B, 1756-EN2T/D, 1756-EN2TR, 1756-EN2TXT, 1756-EN2TRXT, 1756-EN2F
These release notes describe enhancements, corrected anomalies, known
anomalies, restrictions, and application notes regarding enhanced redundancy
system revision 20.055_kit2 or earlier.
Topic Page
About This Enhanced Redundancy Firmware Bundle 2
Compatible Software Versions 5
About the Redundancy Module Configuration Tool 6
Enhancements 7
Corrected Anomalies 9
Known Anomalies 12
Restrictions 15
Application Notes 18
Upgrade the RSLogix 5000 Software Version 26
Replace 1756-EN2T Modules 28
Upgrade the RSLogix 5000 Software Version and Replace 1756-EN2T Modules 32
Upgrade Ethernet Modules When Rotary Switches Are Set between 2…254 34
Upgrade by Using Redundancy System Update 41
Replace 1756-RM/B (or earlier) Modules with 1756-RM2 Modules 58
Storing a Project to a Nonvolatile Memory Card While Your Process Is Running 59
Additional Resources 62
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