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Designer - OPC UA

The OPC UA device allows you to set up a communications server device that the Cognex Designer project can use to interact with an OPC Unified Architecture (UA) client application. OPC UA is a free, cross-platform machine to machine communication protocol for industrial automation, offering robust security solutions and an integral information model, allowing users to model their complex data into an OPC UA namespace to take advantage of the protocol's rich service-oriented architecture. When this plugin is installed and used in a Cognex Designer project, you can interact with your deployed vision application through an OPC UA client application either by reading and writing supported Tags, or by executing the published and supported $ functions of the project. The protocol is represented in Cognex Designer with the OPC UA Server Device.

2025. 01. 29.

Details

OPC UA Server under Designer

The OPC UA feature is only available if the optional OPC UA Server plugin has been selected for installation in the Cognex Designer setup. 

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Perform the following steps to configure an OPC UA Server device :

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  1. In the Project Explorer, search for the Devices > Communications > OPC UA node
  2. Right-click the OPC UA node, and then left-click Add 'OPC UA Server' Device
  3. The Parameter Configuration dialog appears. Fill the available properties as applicable.
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PropertyDescription
NameThe user-specified name used to reference the server device in the Cognex Designer project.
PortSpecifies the port to be used as the base address of the OPC UA server device. OPC UA client applications will communicate with the OPC UA server device through this port. 
Endpoint port Specifies the endpoint URL, used by the OPC UA Discovery Server on the network. Configure this property if Cognex Designer is running on a machine with multiple OPC UA servers.

Note : Cognex Designer supports only one OPC UA Server device per project.

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You can connect to the OPC UA Server device with a OPC UA client while the project is under development. For this, you will need to provide the endpoint URL of your OPC server, formatted as follows : opc.tcp://localhost:62540. 

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