3/31/2016 6:21 PM | |
Joined: 9/27/2006 Last visit: 8/16/2024 Posts: 12277 Rating:
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Hello KGI; To inverse the functioning of a PID loop, you simply have to set a negative GAIN value. Look at the replies in this discussion (specially those from hdhsseini) for more details: determine reverse or direct action of PID https://support.industry.siemens.com/tf/de/en/posts/51474/ and the contents of this FAQ:
Reversing the direction of control action of the controller 'CONT_C' (SFB41/FB41) https://support.industry.siemens.com/cs/ae/en/view/8718842 Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 4/1/2016 9:36:14 PM |
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4/15/2016 8:47 AM | |
Posts: 33 Rating:
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I think you can reverse the high limit and low limit and it will work |
4/15/2016 2:46 PM | |
Posts: 10 Rating:
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Hello KGI, For Reverse Logic you can place Set Point at PV & Process Valve at SP. because, Error = SP ~ PV. (SP-PV or PV-SP) you can change accordingly. Thanks. |
4/15/2016 3:54 PM | |
Joined: 9/18/2013 Last visit: 2/20/2024 Posts: 203 Rating:
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Hello, The negative gain method is correct I used it several times, It works perfectly |
4/25/2016 3:24 PM | |
Posts: 101 Rating:
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The Best Way is Just to set a negative Gain |
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