I have taken your advice and made the timestep, 0.125hr<div><br></div><div>Still I cannot get it to work. it is still switching on the time step instead of the dead-band temp.</div><div><br></div><div>Mike<br><br><div class="gmail_quote">
On Wed, Sep 21, 2011 at 3:33 PM, Matt Duffy <span dir="ltr"><<a href="mailto:duffy@tess-inc.com">duffy@tess-inc.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<br> Dear Michael,<br><br>Please make sure that you are using a reasonable timestep such as 0.125 hr (type in terms of hours to avoid problems with the Studio's minute conversion trucation). Also, make sure that you have the latest TRNSYS and TESS Libraries versions as well.<br>
<br>Best regards,<br><font color="#888888"><br>Matt Duffy<br> <br> </font><div style="background-repeat:repeat-x"><div><div></div><div class="h5"><strong>----- Original Message -----</strong><br><strong>From:</strong> "Michael Bissett" <<a href="mailto:mikebiscuit@gmail.com" target="_blank">mikebiscuit@gmail.com</a>> <br>
<strong>Sent:</strong> Tue, September 20, 2011 12:44<br><strong>Subject:</strong> Re: [TRNSYS-users] Type 2b controller dead band problem.<br><br></div></div><table cellspacing="5" width="100%"><tbody><tr><td><div><div><div>
</div><div class="h5"> Hi <div> </div><div>I have read the information, I have tried to increase parameter 1, I have also looped the controller to its self. Still it does not work</div><div>I have also tried changing many other parameters and have spent a lot of time on this problem. still with no luck.</div>
<div> </div><div>Any other suggestions?</div><div> </div><div>Mike</div><div> </div><div> </div><div> </div><div><br><div class="gmail_quote">On Tue, Sep 20, 2011 at 1:59 PM, Angel Carrera <span dir="ltr"><<a href="mailto:angel.carrera@aiguasol.coop" target="_blank">angel.carrera@aiguasol.coop</a>></span> wrote:<br>
<blockquote style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex" class="gmail_quote"><br>Mike,<br><br>you should connect the output control function of the controller to its own input control function (Input number 4). Also, you should increase the value of parameter 1, to the default value at least (the influence of this parameter is explained at the type 2 documentation, I recommend you to read it, together with the generic section for controllers at the trnsys help)<br>
<br>Regards<br><br>Angel<br><br><br><div class="gmail_quote"><div><div> </div><div>2011/9/19 Michael Bissett <span dir="ltr"><<a href="mailto:mikebiscuit@gmail.com" target="_blank">mikebiscuit@gmail.com</a>></span></div>
</div><blockquote style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex" class="gmail_quote"><div><div> </div><div>Dear Trnsys<div> </div><div>I am experiencing problems with a simple<b> type 2b controller</b>.</div>
<div> </div><div>I am using a solar collector type 564b</div><div> </div><div>I am trying to compare the temperature of the output of the collector with output of the tank, getting a temperature difference. I have set the dead band from 4-10 degrees C.</div>
<div> </div><div>In the simulation as the temperature rises to 10degrees difference, the control signal is 1 switching the pump on correctly. but after this the controller only switches every time step. I have tried shortening the time step... and changing other parameters.. still with no success.</div>
<div> </div><div>I have attached the file.</div><div> </div><div>Yours Sincerely</div><div> </div><div>Mike Bissett</div><div> </div><div>Department of Electrical Engineering</div><div>University of Cape Town </div> <div>
South Africa</div> </div></div>_______________________________________________<br> TRNSYS-users mailing list<br> <a href="mailto:TRNSYS-users@cae.wisc.edu" target="_blank">TRNSYS-users@cae.wisc.edu</a><br> <a href="https://mailman.cae.wisc.edu/listinfo/trnsys-users" target="_blank">https://mailman.cae.wisc.edu/listinfo/trnsys-users</a><br>
<br></blockquote></div><br><br clear="all"><br>-- <br><font size="4" style="color:rgb(0, 102, 0)"><b>Àngel Carrera</b></font><br style="color:rgb(0, 102, 0)"><br style="color:rgb(0, 102, 0)"><b style="color:rgb(0, 102, 0)">Responsable I+D<br>
Àrea tècnica</b><br style="color:rgb(0, 102, 0)"><img alt=""><br><span style="color:rgb(0, 153, 0)">Sistemes Avançats d'Energia Solar Tèrmica SCCL</span><br style="color:rgb(0, 153, 0)"> <span style="color:rgb(0, 153, 0)">C/ Roger de Llúria, 29 3r 2a 08009 Barcelona</span><br style="color:rgb(0, 153, 0)">
<span style="color:rgb(0, 153, 0)">Tel: <a value="+34933424755" href="tel:%28%2B34%29%2093%20342%2047%2055" target="_blank">(+34) 93 342 47 55</a> Fax: <a value="+34933424756" href="tel:%28%2B34%29%2093%20342%2047%2056" target="_blank">(+34) 93 342 47 56</a></span><br>
<font color="#888888"><br> <a href="mailto:angel.carrera@aiguasol.coop" target="_blank">angel.carrera@aiguasol.coop</a><br><a href="http://www.aiguasol.coop/" target="_blank">http://www.aiguasol.coop</a></font><br> </blockquote>
</div></div> </div></div><hr size="1" noshade><div class="im"><pre>_______________________________________________
TRNSYS-users mailing list
<a>TRNSYS-users@cae.wisc.edu</a>
<a href="https://mailman.cae.wisc.edu/listinfo/trnsys-users" target="_blank">https://mailman.cae.wisc.edu/listinfo/trnsys-users</a>
</pre></div></div></td></tr> </tbody></table></div></blockquote></div><br></div>