Re: [TRNSYS-users] Antiproportional behaviour of PID

[Daniel Uhl <d@f26.at>]

Have you tried just using a negative number for the proportional value of your controller?

Yours,
Daniel

Am 01.02.2018 um 12:21 schrieb s0537085 via TRNSYS-users:
> Hi,
>
> I´m trying to set PID-controller to following:
>
> If temperature is too high, a flow rate should increase, as well.
>
> If temperature is too low, flow rate should decrease.
>
> So far, PID- controllers usually do right the other way round: If
> temperature too low, increase flow rate.
>
> In my system, I want to heat an air flow in a cross flow heat exchanger.
> If the air flow rate is too high, it exceeds the heat exchangers power,
> and the outlet temperature can´t reach the desired temperature.
>
> Thanks
>
> Tom
>
>
>
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