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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;color:navy'>Dear Karl,<o:p></o:p></span></font></p>
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<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;color:navy'>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. <o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;color:navy'>(PS: you
can use GE instead of combining GT and EQL)<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;color:navy'>Kind
regards<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;color:navy'>Stefan<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>Van:</span></font></b><font face=Tahoma><span
style='font-family:Tahoma'> Karl Vonderputten [mailto:karl@chromagen.com.au] <br>
<b><span style='font-weight:bold'>Verzonden:</span></b> woensdag 24 oktober
2007 23:27<br>
<b><span style='font-weight:bold'>Aan:</span></b> Stefan de Kool<br>
<b><span style='font-weight:bold'>Onderwerp:</span></b> RE: [TRNSYS-users]
Raising flags</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Hello Mr De kool<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>You could try the
following to raise a flag<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Eqns 3<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Tset = 60 !
Tset whatever set point<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Tin = [9,6] !
Whatever output from whatever control card<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Tout = Tset*GT(Tin,
Tset)+ Tset*EQL(Tin, Tset) + Tin * LT( Tin, Tset) <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>I included the
expression in the middle because I was not sure what the equation would do if
the <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Value Tin was ever
exactly equal to Tset. It may not be necessary<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Please let me know
if this was helpful<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>(I may like to use
it later myself)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Regards<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>Karl Von Der Putten<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span lang=EN-AU
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
face=Tahoma><span lang=EN-US style='font-family:Tahoma'> Stefan de Kool
[mailto:S.deKool@chri.nl] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, 25 October 2007
1:03 AM<br>
<b><span style='font-weight:bold'>To:</span></b> trnsys-users@engr.wisc.edu<br>
<b><span style='font-weight:bold'>Subject:</span></b> [TRNSYS-users] Raising
flags<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-AU style='font-size:
10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Dear
all,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>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.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'>Stefan
de Kool<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt;font-family:"Times New Roman"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;color:navy'>Cauberg-Huygen Raadgevende Ingenieurs B.V.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;color:navy'>Bezoekadres: Boterdiep 48, 3077 AW ROTTERDAM</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;color:navy'>Postadres: Postbus 9222, 3007 AE ROTTERDAM</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;color:navy'>Telefoon: +31 (0)10-2443638</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;color:navy'>Fax: +31 (0)10-425 44 43<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;color:navy'>http://www.chri.nl<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=DE
style='font-size:10.0pt;color:navy'>E-mail: s.dekool@chri.nl<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=DE
style='font-size:10.0pt;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><img
width=300 height=75 id="_x0000_i1025" src="cid:image001.jpg@01C816EB.6AEFDF90"><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span lang=DE style='font-size:10.0pt;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 face=Arial><span style='font-size:10.0pt'> </span></font><font
size=3 face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt'><o:p> </o:p></span></font></p>
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