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Rockwell Automation Publication 1715-RM001A-EN-P - June 2019
Chapter 1
The ControlLogix/1715 SIL 2 System
Figure 2 - Synchronized Secondary Controller
Features not Supported
The following features are not supported in a ControlLogix Redundancy system.
• Any motion feature or instructions
• Any SIL 3 functional safety feature
• Firmware Supervisor
• You cannot use the Match Project to Controller feature available in Studio
5000 Logix Designer® in a redundancy system.
• You cannot use consumed Unicast connections in a redundancy system.
The redundancy controllers can be the producer.
• Unicast I/O is not supported in a redundancy system.
– If you attempt to use consumed Unicast connections, disqualification
occurs and qualification of an unsynchronized redundant chassis pair is
not allowed. You can use produced Unicast connections that remote
controllers consume.
• Local I/O is not supported in either of the Controller chassis
The redundant controller application cannot contain these tasks:
• Event tasks
• Inhibited tasks
IMPORTANT
There are different versions for redundant and non-redundant firmware. Only
certain ones are certified for use in an SIL 2 system. See the revision release list
from the product certifications link for more information.
