8/17/2023 8:31 AM | |
Joined: 6/19/2019 Last visit: 7/10/2024 Posts: 697 Rating:
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Have you tried to change in properties integration time or smoothing? Maybe this will help you |
8/17/2023 12:10 PM | |
Joined: 10/21/2022 Last visit: 7/4/2024 Posts: 16 Rating:
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This is just my poor assumption that because the NORX function is ranging from 0 to 27648, and the sensor range is from 0 to 30 BAR, I just simply divided the sensor range by the NORMX range, and assumed that the PLC would read a different result within that range. Apologies for my lack of knowledge, but when you say 16 bit and 10 bit, to you mean that the 27648 is 16-bit, but if the PLC can only read 10-bit then the space between the differently ready pressures would be much higher? i.e. not 0.0157 PSI, but something like 0.25 PSI? That would make sense based on the readings I am getting. To counter this, would the S1500 range improve the sample rate? If so, then I might just get one of these ordered to test it. I could get away with keeping the 6 bar sensor on the rig, but would be better if I had 30 bar. I've added an attachment which shows the two differences with the different sensors. Hope this helps. Thanks to everyone so far! Ver helpful people as always :) - AD AttachmentData Trends.pdf (439 Downloads) |
8/17/2023 12:53 PM | |
Joined: 9/23/2005 Last visit: 8/29/2024 Posts: 4677 Rating:
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Yes. In case of S7 analog modules, the max value is always 27648 "counts" no matter what a bit resolution of a module is. But what changes is step the reading changes between two different levels. In case of 16 bit module it is 1 "count". Less bits means more "counts" pre step. How about extending your set up by adding e.g.6ES7231-5ND32-0XB0? It should be less expensive than S7-1500 and still meeting your requirements. |
Last edited by: jacek d at: 08/17/2023 12:56:39Regards, |
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8/17/2023 1:26 PM | |
Joined: 10/21/2022 Last visit: 7/4/2024 Posts: 16 Rating:
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Thank you for this - This may be what I need to resolve the issue. As you say, it's 16-bit so the resolution should be much higher than the standard 1215 PLC CPU. One question though... Am I able to use 0-10V on this? It states -10V/+10V, and I assume this just means the full range of the analogue input card so would still allow for 0-10V by setting the NORMX function from 0 to 27648, rather than -27648 to +27648? - AD |
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