[TRNSYS-users] PID Type 23 # of Warnings Exceeded

[Devin Rohan]

Thanks Mehdi for the guidelines.  However, I looked into the list file and
it was saying that the beam radiation was negative for certain angles of
incidences.  I looked at my weather file connections and found the error
(the angle of incidence from the north of the weather file was connected to
the west side of type 56).  So that fixed that problem.

Now, whenever I set the integral term to anything but zero, I get an error
saying "invalid floating point operation" and the list file goes on to say
"the controller was stuck during 0 time steps"  Does anybody know what is
happening here.  Thanks again for all the help

On Sun, Jun 19, 2011 at 9:00 AM, Felix Beuteführ <beutefuf at fh-trier.de>wrote:

> What does the warning massage say? ****
>
> ** **
>
> The simulation automatically stops after I think 400 Warning massages……. *
> ***
>
> ** **
>
> *Von:* trnsys-users-bounces at cae.wisc.edu [mailto:
> trnsys-users-bounces at cae.wisc.edu] *Im Auftrag von *Devin Rohan
> *Gesendet:* Sonntag, 19. Juni 2011 14:19
> *An:* trnsys-users at cae.wisc.edu
> *Betreff:* [TRNSYS-users] PID Type 23 # of Warnings Exceeded****
>
> ** **
>
> I have a PID controller (type 23) controlling the operative temperature of
> a room modeled in Type 56 through the an active layer floor heating system,
> where I control the water supply temperature and have a constant mass flow
> rate.  I tried to base it of the floor heating example TRNSYS provides in
> the feedback control example folder.  When I run the simulation, I get an
> error saying that the number of warnings allowed for a simulation has been
> exceeded.  How can I fix this?  Here is how I have my controller connected
> to the multizone building model:****
>
> ** **
>
>  Equation Editor                    PID                        Type 56****
>
>
> T_operative_set=23  ---------> Setpoint****
>
> ** **
>
>                                       Control Signal   --------->
> T_supply****
>
> ** **
>
>                                 Controlled Variable  <--------    TOPLW
>  (long wave operative temperature)****
>
> ** **
>
> ** **
>
> Thanks for any help****
>
> ** **
>
> --
> Devin M. Rohan, LEED Green Associate
> Purdue University
> Civil/Architectural Engineering
> drohan at purdue.edu****
>



-- 
Devin M. Rohan, LEED Green Associate
Purdue University
Civil/Architectural Engineering
drohan at purdue.edu
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