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Allegro Multimeter Manual

OPC-UA module

The OPC-UA module shows information about Open Platform Communications-Unified Architecture (OPC-UA) binary protocol traffic on Layer 7 and performs response time measurement of related requests and responses.

A PCAP button allows for capturing OPC-UA binary protocol traffic.

The statistics table shows traffic counters of all OPC-UA binary protocol packets. The traffic graph shows both unencrypted and encrypted traffic. For unencrypted requests and responses, the following counters are provided and displayed in the second graph:

  • Unanswered requests: Requests that were not responded within a timeout of 60 seconds or until end of connection.
  • Unrequested responses: Responses without corresponding request.
  • Duplicated requests: Requests that have been already seen. This could be due to a TCP retransmission.
  • Service faults: Service faults of the OPC-UA server.

Requests and responses are correlated based on the security request ID. Response time measurement is performed between them and displayed in the table and in the third graph.