Device-specific OPC UA settings 

The PLCnext Technology controllers have the following device-specific OPC UA settings:

Target Maximum number of sessions Minimum supported sample rate Available sample rates
AXC F 1152 3 100 100, 250, 500, 1000, 2000, 5000
AXC F 2152 5 100 100, 250, 500, 1000, 2000, 5000
AXC F 3152 8 100 100, 250, 500, 1000, 2000, 5000
RFC 4072S 10 50 50, 100, 250, 500, 1000, 2000, 5000
OPC UA PubSub limitations

Starting with the 2022.0 LTS release, the PLCnext firmware has an implementation of the OPC UA Publish and Subscribe specification (PubSub) as a new communication protocol. See also OPC UA PubSub.

The PubSub component and its quantity structure is limited.
The following values apply for the PLCnext implementation:

  • Maximum network message size for all variable values of a ReaderGroup or WriterGroup: 1472 Bytes
  • Maximum number of connections: 4
  • Maximum number of WriterGroups: 8
  • Maximum number of ReaderGroups: 8
  • Maximum number of Writers: 32
  • Maximum number of Readers: 32
  • Maximum number of datasets: 32
  • Minimum publishing interval: 20 ms

 


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• Published/reviewed: 2022-09-14 • Revision 046 •