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Home » Eclipse Projects » 4DIAC - Framework for Distributed Industrial Automation and Control » Read and write memory data of 4diac forte runtime (How to use python code read and write memory data of 4diac forte runtime )
Read and write memory data of 4diac forte runtime [message #1855901] Wed, 09 November 2022 09:33 Go to next message
Bruce Lee is currently offline Bruce LeeFriend
Messages: 2
Registered: November 2022
Junior Member
Hi everyone, I want to read and wirte the variable data of the runtime of Forte in python, just like reading the variable data of Siemens PLC with snap7 library，is there a way to do it？

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Re: Read and write memory data of 4diac forte runtime [message #1855915 is a reply to message #1855901] Wed, 09 November 2022 15:45 Go to previous messageGo to next message
Martin Melik Merkumians is currently offline Martin Melik MerkumiansFriend
Messages: 117
Registered: March 2016
Senior Member
Sure, you can use the monitoring interface in FORTE.
For that you would have to implement it in Python

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Re: Read and write memory data of 4diac forte runtime [message #1855921 is a reply to message #1855915] Wed, 09 November 2022 21:24 Go to previous messageGo to next message
Alois Zoitl is currently offline Alois ZoitlFriend
Messages: 1585
Registered: January 2014
Senior Member
Although I don't think this is the best solution. I think a defined interface between 4diac FORTE and Python would be the better. For example you could publish and subscribe a set of variables in FORTE these variables your python code could read and write via MQTT.

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Re: Read and write memory data of 4diac forte runtime [message #1855924 is a reply to message #1855901] Thu, 10 November 2022 01:34 Go to previous messageGo to next message
Bruce Lee is currently offline Bruce LeeFriend
Messages: 2
Registered: November 2022
Junior Member
Thanks，What 's the name of the interface, I did not find relevant content。

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Re: Read and write memory data of 4diac forte runtime [message #1855956 is a reply to message #1855924] Fri, 11 November 2022 13:51 Go to previous message
Alois Zoitl is currently offline Alois ZoitlFriend
Messages: 1585
Registered: January 2014
Senior Member
When you referring to the management interface Martin mentioned then this is defined in the "IEC 61499 compliance Profile for Feasibility Demonstrations" (https://www.holobloc.com/doc/ita/index.htm). Please have a look in the configurabilty provisions section.

But as I wrote I don't think this is what you should use. It can be dangerous to manipulate control programs via such an interface and is therefore only meant for deployment and debugging purposes. For normal operation something like MQTT, OPC UA, DDS is much better suited.

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