AVEVA™ PI System™ Feedback Portal

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We created this site to hear your enhancement ideas, suggestions and feedback about AVEVA products and services. All of the feedback you share here is monitored and reviewed by the AVEVA product managers.

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Status Completed
Product PI Connectors
Categories PI Connector for OPC UA
Created by Guest
Created on Aug 20, 2022

RELATED IDEAS

Create the ability to configure an update frequency of a connector subscribing to changes on an OPC UA Server

In some cases an OPC UA Server can have tags that update several times per second.  Currently the OPC UA Connector would receive an update on every one of those changes.  This can create a heavy load on the network and OPC Server.  For this scenario it would be good to configure a minimum time that the connector waits before receiving a new update for a tag.
  • ADMIN RESPONSE
    Aug 20, 2022
    Version 1.3.x.x will allow users to accomplish this.
  • Attach files
  • Guest
    Reply
    |     Aug 20, 2022
    I have an IBH Link UA Server that retrieves data from a S7 PLc through MPI network. We get data from this UA server using PI OPC UA connector. Some variables change state several times per second. Since the subscription mode works with this value change events, the volume of data transmitted is not supported by the Siemens S7 MPI network. This causes a data connection lost every 3-4 seconds. I confirm that the same amount of data can be read without issues using Siemens Service lab application with update rate set to 1000ms. Making an analogy with Matrikon`s OPC DA Client: It is possible to set the maximum update rate for an asychronous connection to OPC server, this way, even if a value changes 1000x per second I can read it only every X seconds as per Group settings. This would be a very nice feature for solving performance issues with PI UA Connector.
  • Gabriel Verreault
    Reply
    |     Aug 20, 2022
    This is already supported. The is a configurable parameter. The default is 250ms. The SamplingInterval can be modified in the SubscriptionSettings of the App.OpcUa.config configuration file. TechSupport can help you implement this change.
  • Guest
    Reply
    |     Aug 20, 2022
    In response to Gabriel Michaud-Verreault, "This is already supported. The
  • lmclar
    Reply
    |     Aug 20, 2022
    The is configurable but it applies to the entire connector and all Data Sources configured in it. it is very common for us to want to use a different scan rate for specific types of devices. Unique devices simply have unique requirements and unique performance limitations. It would be nice if the Sampling Interval was exposed as a configuration value that is unique for each Data Source.
  • Gabriel Verreault
    Reply
    |     Aug 20, 2022
    @lmclar, if you are using the 1.3+ version of the connector, you can set the sampling rate on a tag per tag basis if you use the "tag only" mode. Details are in the User Guide