I have a SCADA system with 3-4 PLC`s and looking into building a data collector with Node-RED and push the data forward to AWS. Is there any limitations on number of tags ? Is it only come down to the hardware? Example 500tags x 3 PLC`s example, is that a issue? Can I run these on a Raspberry PI? …

Ethernet comms? Serial Comms? PLC make and model? PLC protocol you are using? Node-red-contrib nodes you are using? how often will you read values? What have you tried? Do you read "tags" individually? or as a batch? (hint batch read is MUCH better) [image] gordone: have a SCADA system …

We are researching different technology for data collection from PLC`s and pushing it forward to AWS. My questions was meant to understand the performance and limitation in Node-RED. Sampling will typical be per second. Is Node-RED meant to be 10-50 tags total or can it handle 1000-2000 tags... L…

I currenty use Node-Red to gather Weather information from 7 different GPS locations (And 7 different Tags for each) every 3 minutes so that is 23,520 tags read every 24 hrs. and then publish back to my Scada system using Mqtt Sparkplug B protocol. And on top of that I gather Stock Market Data 5 ta…

From my experience node-red is not a bottle neck, main reason is PLC driver optimization. As mentioned: [image] Steve-Mcl: Do you read "tags" individually? or as a batch? (hint batch read is MUCH better) But also tag size is important: 16 tags of BOOL type will be equal in size of 1INT. So …

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Data collections from PLC`s

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Steve-Mcl 17 January 2024 14:12 5

Here is another related thread that might help with your evaluation: Can we log 2000 tag data into MySQL - #6 by Steve-Mcl

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Data collections from PLC`s

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