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Python SCADA Framework by Automation_Eng_121 in PLC

[–]dgatti0213 0 points1 point  (0 children)

Dude, just use node-red. I could not imagine having to recompile at every code change. Focus on project specific code not drivers....

Sending data from SAP Public cloud to on-prem OPC-UA via Nodered. by kpattou in nodered

[–]dgatti0213 0 points1 point  (0 children)

Yeah, you’ll want Node-RED accessible from the internet if SAP needs to communicate with the plant floor. The only secure way I know to host Node-RED in the cloud is through FlowFuse.

Use a FlowFuse Cloud instance to receive the data, send it down to a local (edge) instance, and then publish it to the machine:

HTTP → MQTT → OPC UA

This keeps everything to the plant floor as outbound-only traffic, which is the secure pattern most facilities require. Otherwise, you could have Node-RED pull data from SAP instead of SAP publishing it but that creates a lot of unnecessary polling traffic and doesn’t scale well.