EPICS OPC UA Device Support

EPICS Device Support module for interfacing to controllers and servers using the OPC UA protocol.

• Source Code - everything you might want to know

• Documentation - this

• OPC UA Room on EPICS Chat - quick help and discussions

• Usage / FAQ (Wiki) - hints & experiences with specific servers

• Issue Tracker - when things don’t work

The Device Support sits on top of a low-level OPC UA client library. Two SDKs are supported - you need to choose and provide one of them:

• The freely available client library in the SDK of the open62541 project

• The commercially available Unified Automation C++ Based OPC UA Client SDK.

Linux and Windows builds are supported for both client library options.

Dependencies

• C++11 compliant compiler

• EPICS Base 3.15 (>= 3.15.7) or EPICS 7 (>= 7.0.4)

• One of the two supported SDKs (see above)

• (Optional) The gtest module if you want to compile and run the unit tests

See building for details.

Download

Releases are published on the GitHub release page

This includes binary distribution tars, which allow using the commercial Unified Automation Client SDK libraries without any purchase or fee.

Tutorials

• Getting Started
  • Prerequisites
  • Alternative: Binary Distribution for Linux
• Building the Low-Level OPC UA Client Library
  • Option A: open62541 Client SDK
  • Option B: Unified Automation C++ Client SDK
• Building the Device Support Module
• Building an IOC Application
  • Use the Example Application
  • Create an IOC for OPC UA from Scratch
• Running and Verifying Your IOC
  • Use a GUI Client
  • Start your IOC
  • Enjoy OPC UA!

How-to Guides

• Debugging and Tracing
  • IOC Shell Commands
  • Session/Subscription Debugging
  • EPICS Record Debugging
  • Adaptive Concurrency Monitoring
  • Using UaExpert (External Tool)
• Configuring the OPC UA Server on a Siemens S7-1500 Series PLC
  • Activate OPC UA Server
  • Configure OPC UA Server Options
  • Configure OPC UA Server Security
  • Configure OPC UA Runtime License
  • Define Variables in PLC Data Structures
• EPICS Records for Single Scalar Variables
  • General INP/OUT Link Field Format
  • Available Options
  • Example: Output Records with Monitor (Bidirectional Mode)
  • Example: Unmonitored Output Records
  • Example: Input Records with Monitor
  • Example: Unmonitored Input Records
• EPICS Records for Structured Data
  • Creating the Root opcuaItem
  • Linking Element Records to opcuaItem
• Configuring OPC UA Security
  • Certificate Store Setup
  • Client Certificate (Client Authentication)
  • Session Security Setting
  • Identity (Server-Side User Authentication)
  • Managing Certificates

Reference

• iocShell Command Reference
  • Session Management
  • Subscription Management
  • Setting Options
  • OPC UA Security Management
  • Inspection and Debugging
• Cheat Sheet
• Record Types
  • Standard Record Types
  • Custom Record Types
• Requirements Specification
• Source Code API Reference
  • DevOpcua::Session
  • DevOpcua::Subscription
  • DevOpcua::Item
  • DevOpcua::DataElement
  • DevOpcua::RecordConnector
  • DevOpcua::DBEntry
  • DevOpcua::ElementTree
  • DevOpcua::Registry
  • DevOpcua::RequestQueueBatcher
  • DevOpcua::Update
  • DevOpcua::UpdateQueue
  • DevOpcua::linkInfo

Explanation

• Basics, Terms and Concepts
  • Basics
  • OPC UA Terms and Concepts
  • The OPC UA Device Support
• OPC UA Security Concepts
  • Self-signed Certificates
  • Communication Security
  • Client Authentication (Identity)
  • Endpoint Discovery

Miscellanea

• Credits
  • Authors
  • Documentation
• License

Indices and tables

• Index

• Search Page