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valz · Member 3 Joined: 26 Jul 2015 Posts: 771

Library for Data Streams (LStream)
https://support.industry.siemens.com/cs/document/109781165/
The LStream library provides function blocks that can be used to deserialize JSON and XML data streams for the user program and to serialize them again from the user program.
In computer science, a stream is a sequence of data elements that are made available over time. Examples of these data element sequences include data formats such as JSON or XML. These are increasingly being used for the exchange of data from or to a web server.
Due to the increasing use of networking within plants and the advancement of the Internet of Things (IoT), the exchange of data using JSON or XML format plays an increasingly important role in automation technology.
The LStream library makes it possible to convert the JSON and XML data formats into a format that is more compatible with a SIMATIC S7 Controller for further processing. It can also be used to create an XML compus from abstract data for further processing.
Library for Data Streams (LStream) Library for Data Streams (LStream)

Library for Data Streams (LStream) Library for Data Streams (LStream)

Advantages
The function blocks of the LStream library
can be used immediately by parameterization
can be used universally
are not protected and therefore customizable

Documentation and Library
https://support.industry.siemens.com/cs/attachments/109781165/109781165_LStream_DOC_v11_en.pdf
https://support.industry.siemens.com/cs/attachments/109781165/109781165_LStream_LIB_v11.zip

Further Information
https://support.industry.siemens.com/cs/document/81318674/programming-guidelines-and-programming-styleguide-for-simatic-s7-1200-and-s7-1500
https://support.industry.siemens.com/cs/document/109479728/library-of-general-functions- (lgf)-for-simatic-step-7-(tia-portal)-and-simatic-s7-1200-s7-1500
https://support.industry.siemens.com/cs/document/109780503/libraries-for-communication-for-simatic-controllers

https://ulozto.net/tamhle/MIhgDpFGmPyJ/

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