Safety Network Number (SNN)
The Safety Network Number (SNN) uniquely identifies a network in all networks in the safety system. The SNN is responsible for assigning a unique number to each safety network or safety subnetwork in a system. The SNN constitutes part of the unique network node ID (unique network identifier, UNID).
The Safety Network Number (SNN) of the safety option must match the Safety Network Number of the assigned, fail-safe controller.
The safety option maintains its SNN after assignment. The SNN must first be reset before it can be reused with a different value.
Additional information
