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OPC-UA Server - Instance & item setup

How to setup an OPC-UA server instance and item in SIA

Written by Paul Bendixen

Updated at July 22nd, 2021

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Articles in this section:

  • OPC-UA Server - Instance & item setup
  • OPC-UA Server - Troubleshooting

Table of Contents

ParametersInstanceItem Data types

The SIA OPC-UA Server  Connector allows connections to items in SIA using the OPC-UA protocol.

Both unencrypted as well as encrypted access is available.


Parameters

The OPC-UA Server has specific parameters for both the instance and the item.


Instance

The instance needs the following parameters to configure the server

Parameter Description
Name The dot(.) separated URN of the service.
My Service -> urn:My.Service.sia
Port The TCP port where the server will be available
Default: 4840
Certificate (optional) A certificate file in .pem or .der format for establishing authenticity
Key (optional) An x509 key pair in either .pem or .der format for encryption


Item

The item must be configured to expose an item in another connector    

Parameter Description
Name Browsable name of the OPC-UA node. Do not use spaces
Desc. The description available for the node.
Item UID or name of the referenced item enclosed in %
e.g. %BOTTLE_CNT%


Info

Currently there is no support for namespaces other than 1. Please contact sales with your use case if this is necessary for you.


Data types

All values are given as OPC-UA strings.



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