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  1. lbonillayanez
  2. PLCnext Technology & PLCnext Controls
  3. Wednesday, 07 April 2021
Dear colleagues, I would like to ask you what are the limitations for OPC UA, I mean how many OPC UA clients can I connect to PLCnext?
Martin PLCnext Team Accepted Answer Pending Moderation
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Hi Luis,
The number of concurrent OPC UA client sessions (not clients) is limited to the number specified by the "MaxSessionCount" parameter in this configuration file on the PLC:
/etc/plcnext/device/Services/OpcUA/opcua.settings
We are planning to update the OPC UA server documention in the Info Center in the coming months with this (and more) information.
~ Martin.
Phoenix Contact Electronics Headquarters - PLCnext Runtime Product Management and Support
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