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• OPC UA PubSub Configuration Error (PLCN0028): '...': Network address must be an url with the following pattern: opc.udp://(:port)

OPC UA PubSub Configuration Error (PLCN0028): '...': Network address must be an url with the following pattern: opc.udp://(:port)

In the configuration of the OPC UA PubSub communication, an invalid network address is specified in the properties of a connection. This Multicast address specifies the network to which each writer contained in the particular connection publishes its data values.

Remedy

Open the properties editor of the affected connection and define a valid multicast address which also includes the opc.udp prefix and a valid port number (4840 by default).

Example