Logix SIS Redundancy System Update Migration Paths

General Rules:

• Going to a later minor revision and/or kit is acceptable.

• Going to the next major revision is acceptable.

• Going through more than one major revision requires you to perform the RSU process multiple times.

Logix SIS Redundancy System Update Migration Path Limitations

From Firmware Revision	Firmware Revision Updates Conditionally Not Allowed^*
37.011_kit1	—
37.011_kit2	—
37.012_kit1	—
38.011_kit1	—

*Depending on the modules used in the local rack, you may not be able to update the system with RSU. See Knowledgebase Technote ControlLogix®: Redundancy Firmware Bundle Revision History to see which modules are at an older firmware in the newer redundancy bundle.