Redundancy in industrial networks
Network redundancy is the backbone of 800xA's network technology. ABB's Redundant Network Routing Protocol (RNRP) enables a network architecture with two physically separate networks.
Network redundancy adds an extra instance within the network infrastructure to ensure network availability. This serves as a backup for shifting network communications onto the other network in case of a disturbance in the first one, and therefore avoiding single point of failure.
Redundancy is of special importance in industrial process applications and in safety-critical systems where network downtime could cause serious problems and production stop. In a redundant network, a disturbance in one of the networks automatically leads to a shift over to the other network.
All RNRP versions used in previous system versions of System 800xA are compatible with each other.