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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>One solution to your problem might be to use Type93 for Input Value Recall from the standard component library, feeding a new input variable to your equation:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>T_COOL_ON </span><span style='font-size:10.0pt;font-family:Wingdings'>à</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Type93 </span><span style='font-size:10.0pt;font-family:Wingdings'>à</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> T_CTRL<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>T_COOL_ON = T_CTRL </span><span style='font-family:"Calibri","sans-serif"'>+ PPD20 -PPDHI</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Ben Heymer, PE<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Senior Energy Engineer | <b>Energy Center of Wisconsin</b></span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:gray'> | <b>Madison.Chicago.Minneapolis<o:p></o:p></b></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>608.210.7168 | Mobile: 312.315.4783 | <a href="http://www.ecw.org/" title="Energy Center Home Page"><span style='color:black;text-decoration:none'>www.ecw.org</span></a><o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> trnsys-users-bounces@cae.wisc.edu [mailto:trnsys-users-bounces@cae.wisc.edu] <b>On Behalf Of </b>Alex Rachid<br><b>Sent:</b> Wednesday, October 23, 2013 10:17 AM<br><b>To:</b> trnsys users<br><b>Subject:</b> [TRNSYS-users] Equation : variable use / iteration<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-family:"Calibri","sans-serif"'>Dear All<br> <br>I am writing an equation in TRNSYS:<br> <br>1- For the next iteration I want to use the previous value of the same Variable<br> <br> example: <br> T_COOL_ON = T_COOL_ON + PPD20 -PPDHI<br> this is throwing an error.<br> <br>2- How can I set the initial value of the variable (T_CCOL_ON in the previous example)?<br> Should it be set in the "Simulation Cards"?<br> <br>Regards & Thanks<br> <br>Alex<br> <br> <br><br> <br> <o:p></o:p></span></p></div></div></body></html>