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OPC UA

Overview

OPC UA is one of the protocols for exchanging data between multiple vendors; as a highly reliable protocol it is a recommended standard in Industry 4.0
This page shows how to use an OMRON PLC as an OPC UA server and how to connect to it from PC applications.

Benefits of OPC UA

Benefits of OPC UA
ItemDescription
StandardizationVendor independent
SecurityCertificate authentication
ExtensibilityInformation model support
ConnectivityPLC, SCADA, MES, cloud

OPC UA compared with other protocols

OPC UA compared with other protocols
ItemDescription
OPC UAIntegration with higher-level systems
FINSOMRON proprietary
EtherNet/IPReal-time control
Modbus TCPSimple communication
MQTTCloud integration

PLC settings

To use OPC UA on the PLC, change the OPC UA server setting to "Use"
(unit version 1.17 or later)

PLC OPC UA server settings
OMRON PLC OPC UA server settings screen

Example client software

OPC Foundation Japan

https://www.unified-automation.com/products/development-tools/uaexpert.html
How to use it -> Connecting to the PLC with the PC application UaExpert

UaExpert


UA-NetStandard

An open source client https://github.com/OPCFoundation/UA-.NETStandard-Samples
How to use it -> Connecting to the PLC with C#

UA-NetStandard


UERTO UA Monitor

An Excel add-on https://www.ibress.com/products/UaMonitor/index.html


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