Safety Network Numbers (SNNs)
Communication within a control system travels over subnets that are interconnected with bridging or routing components. The following are examples of subnets:
- The backplane of a chassis
- A bank of I/O modules
- An Ethernet subnet within a LAN
Rather than creating a UNID directly for each
CIP Safety™
device, which can be prone to error in a large system, each subnet has a unique safety network number (SNN), and the UNID is created from the SNN + the node address. Provide Feedback