Produced and Consumed Tags
Produced and consumed safety tags are not supported in Logix SIS.
In redundancy systems, controllers let you produce (send) and consume (receive) system-shared tags over an
EtherNet/IP™
network.
IMPORTANT:
A redundant controller can produce tags to a standard controller using unicast or multicast. Redundant controllers must always consume tags using multicast.
Example System Using Produced and Consumed Tags
Item | Description |
|---|---|
A | Controller 1 produced tag |
B | Controller 2 produced tag |
Produced and consumed tags in redundancy systems have the following requirements and restrictions:
- You cannot bridge produced and consumed tags over two networks. For two controllers to share produced or consumed tags, both must be attached to the same network.
- Produced and consumed tags use connections in the controllers and the communication modules.
- Because the use of produced and consumed tags uses connections, the number of connections available for other tasks, such as the exchange of I/O data, is reduced.
- The number of connections available in a system depends on the type of controller and types of communication modules. Closely track the number of produced and consumed connections to leave as many as necessary for other system tasks.
- When you configure a tag that a redundant controller consumes, the tag configuration in the remote controller (the producer) and the consumer controller in the redundant chassis pair must be configured to be multicast.
- When you configure a tag that a redundant controller produces, the tag can be configured as multicast if there are multiple consumers or unicast if there is one consumer.
IMPORTANT:
To avoid a drop in connection during a switchover, when you add a communication module for the redundant chassis to the I/O tree of a remote consuming controller, change the Connection setting from Rack Optimized to None.
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