Specifications

RSLinx – Training Guide 55
Alias Configuration
An Alias Topic is a “virtual” or “redundant” topic that you can use to reference other
topics. This allows you to define a “virtual topic” which can be directed to one of several
physical PLC devices, with automatic switchover.
You can also configure the criteria used for switching from primary to backup devices, or
you can force a switchover using a DDE Execute command. Alias topics are not
mandatory for communication to occur.
For example, if you have a PLC accessed by an Ethernet driver, a KT driver, and a DF1
driver, you could create three topics. You can then create an alias topic which prioritizes:
1) Ethernet driver's topic
2) KT driver's topic
3) DF1 driver's topic