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3/19/2008 8:55 AM | |
Posts: 29 Rating: (0) |
Hi, Get an temperature from an slave on Profibus DP. The temperature is read by an PT100-element and connected to the DP-slave by 4-20mA. 4-20mA gives me a value between 170-853. The DP-slave manufacturer DEIF, Denmark gives me how to calkulate the resistance: resistance = ("unscaled value" +509)*100/771 The problem is the resistance Table. I want a function/FB that simulate the table. Resistance in gives temperature back. Do you have this FB. Best regards Per L AttachmentPT100-tabell.pdf (350 Downloads) |
3/19/2008 3:58 PM | |
Joined: 9/23/2005 Last visit: 10/18/2024 Posts: 4350 Rating: (1448) |
Hi, some time ago I wrotte a FAQ about PT100 (with sample program). It was aproved but not yet pubiched. In this mean time, I attached a preliminary version. There are FB to convert resistence in temperature and vice-versa. good luck Attachmentok PT100 2-wire.zip (527 Downloads) |
Denilson Pegaia |
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