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@web.de
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David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
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