CODESYS OPC UA PubSub SL

$50.00
Current version
1.0.0.0
Article number
2311000001

The library OPC UA PubSub SL allows for the exchange of messages via the Pub/Sub protocol defined by the OPC UA Foundation.

Product Description

Communication via the OPC UA Pub/Sub protocol provides, in addition to the Client/Server communication, also a possibility to exchange data between the subscribers of a network in compliance with the rules of the OPC UA Foundation. The structure of the data (DataSet) can be freely defined and is agreed in advance between the sender and the receiver. This eliminates the need to transport additional (meta)data. The data transfer takes place with the help of the OPC UA PubSub SL library via UDP/IP according to the rules defined for UADP. A Publisher publishes its data to an unknown number of Subscribers. So the sender and receiver do not know each other. That is why the number of receivers also does not have any repercussions for the sender. A reply to the sender as to whether its messages have reached the receivers cannot be sent via the protocol due to the nature of the protocol. If necessary, such a reply has to be managed in an application-specific way. The data is transferred in a binary format according to the rules of the OPC UA Foundation. The OPC UA PubSub SL library takes over the conversion of IEC data types into the corresponding OPC UA data types and back. The implementation thereby follows the profiles below:

  • Publisher: PubSub Publisher UADP Periodic Fixed Settings

  • Subscriber: PubSub Subscriber UADP Periodic Fixed Settings

The message length is limited to 1500 bytes (MTU) (Chunked NetworkMessages not supported). As long as the rules for a Time Sensitive Network is still not available, hard real-time conditions cannot be complied with. However, the implementation of the OPC UA PubSub SL library attempts to keep the jitter as low as possible.

Requirements

Development system

CODESYS Development System V3.5.14.0 or higher

Runtime

CODESYS Control V3.5.14.0 or higher

Supported platforms and devices

Note: Use the “Device Reader” project for locating the functions supported by the PLC. The Device Reader is available in the CODESYS Store free of charge.

Additional requirements

Depending on the capabilities of the respective runtime system, the messages can be sent via Unicast, Multicast, or Broadcast.

Restrictions

  • The maximum length of a Networkmessage is 1500 bytes. (Chunked NetworkMessages not supported)

  • The transmission time point is determined via the task configuration. (The parameter udiPublishingInterval does not have any effect.)

Licensing

License activation optional on the CODESYS Key or Soft Key (Soft Key: Free component of CODESYS Control) Licensing by means of the Soft Key is bound to the hardware.

Note: Without a license, the software runs for 30 minutes in demo mode.

Required accessories

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Support

Technical support is not included with this product.

To get technical support please purchase a Support ticket.

A list of alternative support resources can be found at the support section of the CODESYS Group web page.

Provider

CODESYS Corporation
A member of the CODESYS Group

900 Cummings Center, Suite 403-T
Beverly, MA 01915, USA

Additional Downloads

All Versions

Version Release Notes Release Date
- 07.10.2020

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