CODESYS for Users (Brochure)
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25.10.2023
Communication via OPC UA: standard interfaces for communication
CODESYS OPC UA Server
With the CODESYS OPC UA Server, you enable access to variables in your control project. This allows you to exchange data with other systems that have implemented an OPC UA client. The server is already implemented in many CODESYS-compatible controllers. The CODESYS SoftPLC systems include a basic version with a limited scope of exchange data. You can use additional licenses to significantly increase the limit or switch it off completely.
Properties:
- Included in all CODESYS-compatible SoftPLCs (prerequisite: sufficient performance of the target system, TCP/IP stack and real-time clock).
- Implementation of communication in accordance with the OPC UA specification as per the "Micro Embedded Device Server" profile, based on the OPC Foundation communication stack.
- OPC UA Server: tested and certified for conformity.
- Included as a restricted version in all application-based runtime licenses without additional license fees.
- Convenient integration into project user management.
- Symbol sets: different information models for different use cases and clients (HMI, cloud, SCADA, etc.).
- Graphical configurator (Communication Manager) in the CODESYS Development System: release of PLC variables for OPC UA communication with just a few clicks.
- Seamless integration with the control application
- Direct access to variables in the control project without additional tools
- Simple call of implemented methods in the control project possible via OPC UA
- Integration with alarm configuration: uniform and consistent alarms in HMI and OPC UA clients
- Two types of server configuration possible:
- Based on the information model
- Based on the control application: implicit creation of an information model
CODESYS OPC UA Client
You can use the CODESYS OPC UA Client to connect to variables of any OPC UA server, typically a controller. You use these in your controller project like locally declared variables. The CODESYS OPC UA Client is already implemented in many CODESYS-compatible controllers. The SoftPLC systems from CODESYS include a basic version with a limited scope of exchange data. You can use additional licenses to significantly increase the limit or switch it off completely.
Properties:
- Included in all CODESYS-compatible SoftPLCs (prerequisite: sufficient system performance, TCP/IP stack and real-time clock)
- Support for variable access, method calls, and alarms as well as all available functions in the CODESYS OPC UA Server
- Usage variants for reading in data for the IEC 61131-3 application and CODESYS Visualization:
- Convenient configuration in the data source manager
- Explicit call of library functions within the application
CODESYS OPC UA PubSub
With the publish-subscribe standard as a special part of the OPC UA specification, you can exchange data between two systems with virtually no overhead. The protocol is therefore just as suitable for sensors and actuators as it is for streamlined data exchange between controllers, as the full OPC UA stack is not required.
Properties:
- CODESYS library for data exchange according to the standardized procedure between devices via UDP protocol
- Licensing per device ("SL" license)
- Use of function blocks for sending (Publisher) and receiving (Subscriber) data and for configuring communication in the PLC application
- Execution of the blocks cyclically in a PLC or background task
- Diagnostic information can be called up at runtime or via visualization for almost all functions
- Supplied sample project for an easy start
- Expandability for future protocols and TSN/FLC
- System requirements on the controller:
- Implemented system library for socket access to Ethernet
- Possibility of license storage (via dongle or software container)
- Can be used in all CODESYS SoftPLCs (see CODESYS Store)
CODESYS OPC (DA) Server
OPC (Open Platform Communications) is a standard interface for accessing process data in automation technology, based on MS Windows technologies. The CODESYS OPC Server is a Microsoft Windows program that is included with the IEC 61131-3 programming system. A license is required to use it: either via a USB dongle (CODESYS Key) or a so-called soft container on the PC on which the CODESYS OPC Server is running.
Supported specifications according to
- OPC Common Definitions and Interfaces Version 1.0
- Data Access Custom Interface Standard Version 1.0a
- Data Access Custom Interface Standard Version 2.05A
- Data Access Custom Interface Standard Version 3.0
- Data Access Automation Interface Standard Version 2.02
- Alarms and Events Interface Version 1.10
- Support for hierarchical browsing of variables
Properties:
- Included with the CODESYS Development System (licensing required)
- Scope of delivery:
- OPC Server
- Server configurator
- Data logger
- Use via symbol configuration in the CODESYS project to release the variables to be exported
- Connections to controllers compatible with CODESYS V3 or V2.3 possible
- Certified by the OPC Foundation
- Not recommended for use in new automation projects (the standard is based on platform-bound MS Windows interfaces)
Additional information
- Technical article
- Roland Wagner, Head of Product Marketing, CODESYS GmbH
Three right ones! The three integrated OPC UA options in CODESYS (German language)
- Roland Wagner, Head of Product Marketing, CODESYS GmbH
- Video
- Roland Wagner, Head of Product Marketing, CODESYS GmbH
CODESYS OPC UA - How you can benefit immediately (webinar recording)
- Roland Wagner, Head of Product Marketing, CODESYS GmbH
How to get
- CODESYS OPC UA Server SL:
- May already be included in CODESYS-compatible controllers or can be installed and licensed via the CODESYS Store.
- Is included in a limited basic version in the application-based licenses and can be extended with an additional license.
- CODESYS OPC UA Client SL:
- May already be included in CODESYS-compatible controllers or can be installed and licensed via the CODESYS Store.
- Is included in a limited basic version in the application-based licenses and can be extended with an additional license.
- CODESYS OPC UA PubSub SL:
- Licenses can be purchased in the CODESYS Store.
- Licenses can be purchased in the CODESYS Store.
- CODESYS OPC (DA) Server SL:
- Licenses can be purchased in the CODESYS Store.
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07.11.2023