[TRNSYS-users] (no subject)

[David BRADLEY]

Thomas,

  If you have access to the TESS controllers library then you will find 
a controller with lockouts such that if it decides to turn on a pump or 
fan (or other) then that device has to run for a certain amount of time 
before it can turn off. There are lockouts on shut down as well.

kind regards,

  David


On 12/27/2019 03:58, Thomas Heyn via TRNSYS-users wrote:
> Hello,
>
> I try to simulate a floor heating system using the active layer on 
> type 56. So far this works. For control I like to use a pi controller 
> but using a pwm output with a period of 20 min (so 50% controller 
> output would be 10 min flow on and 10min flow off). I will therefore 
> set the simulation interval down to 1 Mon or lower.
>
> What I already can do is to scal the pi controller output to 0...20.
>
> What I struggle to do is to "read" the controller output only every 
> 20th simulation step and realise the pwm using equations and value 
> recall.
>
> So the logic is: Every 20 min the controller output, say=5 is received 
> and for the next 5 (as example) min flow for the active layer is 100% 
> and for the following 15 min the flow is 0%
>
>
> Any ideas?
> Mit freundlichen Grüßen
> Thomas Heyn
> thomas.heyn <http://thomas.heyn>@web.de
>
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> TRNSYS-users at lists.onebuilding.org
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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