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<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'>Hi Francesco<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'>Here is the solution to your problem (see attached modified
project):<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'>1. First of all, make sure you connect the output signal of the
Type2b to its "input control function", to ensure a proper hysteresis
effect<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'>2. When you want to switch the control signal to 0 when
approaching a fix target/setpoint temperature with lower value (e.g. when
controlling a heating device), you have to use the following
procedure:<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'> a.
connect your variable temperature to the upper input of the controller<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'> b.
set the same deadband as you did<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'> c.
use the opposite of the control signal via a calculator (either use the
function Not(...), or the equation 1-...)<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'>That's the only way I found to use Type2b to do such a control.<o:p></o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'><o:p> </o:p></span></p>
<p class=MsoPlainText><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#7030A0'>Hope this helps.<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>François Badinier<o:p></o:p></p>
<p class=MsoNormal><span style='color:#C0504D'>Development Engineer<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#00B050'>ICAX Ltd<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;color:#00B050'>1 Hatfield House
<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;color:#00B050'>Baltic Street
West<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:9.0pt;color:#00B050'>London EC1Y OST<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR style='font-size:8.0pt;font-family:"Courier New";
color:black'><a href="mailto:alan.kiff@icax.co.uk"><span lang=EN-GB
style='color:blue'>francois.badinier@icax.co.uk</span></a></span><span
style='font-size:8.0pt;font-family:"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR style='font-size:8.0pt;font-family:"Courier New";
color:black'><a href="http://www.icax.co.uk"><span lang=EN-GB style='color:
blue'>www.icax.co.uk</span></a></span><span style='font-size:8.0pt;font-family:
"Courier New";color:black'><o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText><span lang=EN-US>-----Original Message-----<br>
From: Besana Francesco [mailto:Francesco.Besana@eurac.edu] <br>
Sent: 25 November 2009 11:06<br>
To: trnsys-users@cae.wisc.edu<br>
Subject: [TRNSYS-users] Type-2b???</span></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>Dear Trnsys-colleague,<o:p></o:p></p>
<p class=MsoPlainText>It is unbelievable but I have spend more than one hour on
that and still doesn't work...the point is:<o:p></o:p></p>
<p class=MsoPlainText> <o:p></o:p></p>
<p class=MsoPlainText>I would like to switch off a signal when the difference
between the High Temp (fix to 22 ) and Low Temp is less than 0 and switch on
again when the difference is higher than 1.5..are you able to do that?<o:p></o:p></p>
<p class=MsoPlainText> <o:p></o:p></p>
<p class=MsoPlainText>At the moment in my deck (attached) it seems that instead
off an hysteresis loop I have just a value limit 1.5 where is ON and OFF around
it!!!<o:p></o:p></p>
<p class=MsoPlainText> <o:p></o:p></p>
<p class=MsoPlainText>Thanks a lot and suggestions are well accepted<o:p></o:p></p>
<p class=MsoPlainText> <o:p></o:p></p>
<p class=MsoPlainText>Francesco<o:p></o:p></p>
<p class=MsoPlainText> <o:p></o:p></p>
<p class=MsoPlainText><o:p> </o:p></p>
<p class=MsoPlainText>No virus found in this incoming message.<o:p></o:p></p>
<p class=MsoPlainText>Checked by AVG - www.avg.com <o:p></o:p></p>
<p class=MsoPlainText>Version: 9.0.709 / Virus Database: 270.14.80/2523 -
Release Date: 11/25/09 07:31:00<o:p></o:p></p>
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