Dear Karl,
Thanks
for the idea. The problem is though that as soon as Tin gets less than Tset
again, it ‘looses’ its value. What i want is to keep it at
Tset untill another condition is met, but not when Tin<Tset. In fact i want
to include some form of hysteresis in a control loop.
(PS: you
can use GE instead of combining GT and EQL)
Kind
regards
Stefan
Van: Karl Vonderputten [mailto:karl@chromagen.com.au]
Verzonden: woensdag 24 oktober
2007 23:27
Aan: Stefan de Kool
Onderwerp: RE: [TRNSYS-users]
Raising flags
Hello Mr De kool
You could try the
following to raise a flag
Eqns 3
Tset = 60 !
Tset whatever set point
Tin = [9,6] !
Whatever output from whatever control card
Tout = Tset*GT(Tin,
Tset)+ Tset*EQL(Tin, Tset) + Tin * LT( Tin, Tset)
I included the
_expression_ in the middle because I was not sure what the equation would do if
the
Value Tin was ever
exactly equal to Tset. It may not be necessary
Please let me know
if this was helpful
(I may like to use
it later myself)
Regards
Karl Von Der Putten
From: Stefan de Kool
[mailto:S.deKool@chri.nl]
Sent: Thursday, 25 October 2007
1:03 AM
To: trnsys-users@engr.wisc.edu
Subject: [TRNSYS-users] Raising
flags
Dear
all,
Does
anyone know if there is a way to ‘raise flags’ in trnsys? I want to
give a certain variable a value at the moment a certain temperature is reached
and to keep that variable at that value regardless of further temperature
changes.
Regards,
Stefan
de Kool
Cauberg-Huygen Raadgevende Ingenieurs B.V.
Bezoekadres: Boterdiep 48, 3077 AW ROTTERDAM
Postadres: Postbus 9222, 3007 AE ROTTERDAM
Telefoon: +31 (0)10-2443638
Fax: +31 (0)10-425 44 43
http://www.chri.nl
E-mail: s.dekool@chri.nl
