9/1/2008 7:16 PM | |
Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308) |
Dear Pandiani Thanks for your interest. I am attaching the table for your reference. I had written a FC in STL in STEP7 for use in SIMATIC S7 for the same function. Can I use it in PCS7 Thanks Navnag AttachmentSteam_Table.PDF (395 Downloads) |
There is no such thing as the last bug in a program |
|
9/2/2008 10:24 AM | |
Joined: 10/31/2005 Last visit: 9/4/2024 Posts: 366 Rating: (31) |
Navnag, I had this in mind. Instead of interpolation I would use least square approximation (polynomial fit). Look at Excel sheet. So you can make FB that calculates pressure, spec. volume... when you know mathematical relation between them. This way you avoid using lookup tables. If that suits you, I can calculate polynomial coefficients more precisely Best regards, pandiani AttachmentTables.zip (333 Downloads) |
9/4/2008 7:33 AM | |
Joined: 10/31/2005 Last visit: 9/4/2024 Posts: 366 Rating: (31) |
Navnag, what happened? Is this approach good to you? I'm very interested to learn how you resolved your problem. |
9/4/2008 7:32 PM | |
Joined: 10/31/2005 Last visit: 9/4/2024 Posts: 366 Rating: (31) |
Navnag, just keep us informed... Regards... |
9/10/2008 5:16 PM | |
Joined: 10/31/2005 Last visit: 9/4/2024 Posts: 366 Rating: (31) |
Navnag, did you have testing as planned? I'm really curious to learn what you've come up with. Regards, Pandiani |
Follow us on