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Carlos
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Joined: 07 Jan 2012
Posts: 138
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 Posted: 06/04/2015 22:32 Post subject: PID FB41 |
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I'm half naif in siemens  and want to implement 3 loop PID with FB41 in one project, it is possible or can only apply one ?
I'm trying with two loop renaming to FB42 and DB42 but does not work well, the output triggers 0 to 100, 100 to 0, etc, not linear.
i need help
thanks |
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messer
Senior
Joined: 08 Mar 2012
Posts: 2059
Location: Europe
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| Posted: 07/04/2015 19:29 Post subject: Re: PID FB41 |
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| Carlos wrote: | I'm half naif in siemens and want to implement 3 loop PID with FB41 in one project, it is possible or can only apply one ?
I'm trying with two loop renaming to FB42 and DB42 but does not work well, the output triggers 0 to 100, 100 to 0, etc, not linear.
i need help
thanks |
have a little example here
http://dfiles.eu/files/xlcs8vq7g
http://dfiles.eu/files/94y10a127 |
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Carlos
Member
Joined: 07 Jan 2012
Posts: 138
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| Posted: 07/04/2015 22:02 Post subject: Re: PID FB41 |
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| messer wrote: |
have a little example here
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Thank you
I've been watching your examples and I think the mistake that I am committing is to rename second function FB41 to 42, although with different data DB41 and DB42.
Some time ago I did this project and it worked well but now I can not work with 2 PID (?), i thought I could only apply a FB41
I'll try again tomorrow with your examples with hardware.
Thank again
carlos |
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