Dear All,

I am currently working with an S7-1500 PLC and have successfully set up a temperature probe for testing purposes. My objective is to extract diagnostic error entries from theDiagnostic Bufferand make them accessible via Node-RED. The aim is to avoid having to manually open TIA Portal or navigate through the Diagnostic Buffer each time an error needs to be reviewed. Ideally, I would like these errors to be exported to a file or made available in a way that supports automated access and monitoring.

At this stage, I am exploring the use of an MQTT Broker for data transfer. I have already downloaded and imported the required Siemens MQTT library, and have created the corresponding Data Blocks (DBs) and Function Blocks (FBs) as per the documentation.

However, the resources available online often lack detailed implementation steps or omit crucial parts of the process. I would appreciate any guidance or a more detailed step-by-step approach on how to achieve this, particularly regarding the correct setup to extract diagnostic messages and transmit them through MQTT or another efficient method compatible with Node-RED.

Thank you in advance for your support.

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Split from How to extract active error from Diagnostic Buffer.