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10/11/2013 4:49 PM | |
Joined: 1/28/2009 Last visit: 9/10/2024 Posts: 6849 Rating: (1365) |
Hello, Before finalizing parameters for PID controllers in SIMATIC S7 controller ,please share them for our judgement here. 1-TA is the calling rate of OB13 and its range is from 10ms to 655,350ms.For finding this parameter,please follow what already suggested by fritz here: S5 PLC OB13 interrupt time2-The value "w#16#FF6A" sounds to be a negative value as it has the range from -32768 to 32767.To be sure bout this case you need to check overall operation of original loop if it is reverse or direct. For finding the absolute value , you can use the trick how a 2nd complement calculated.After the final multiplication, I guess you need a division by 1000.0. 3-Units for TD and TI should be second. I hope these comments help you Hamid Hosseini |
Last edited by: hdhosseini at: 10/15/2013 10:34 AM |
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10/12/2013 1:52 AM | |
Posts: 14 Rating: (0) |
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