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<p>Ismail,</p>
<p> If you have the TESS Controls library you can use Type660. If
you do not then you can use Type93 in the standard library.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 07/17/2017 08:44, Ismail OUHALLOU
via TRNSYS-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAA779b25YohRjNk27n2BGO-feM-Y9KbbF=Tcao+ub3HO=ng+PA@mail.gmail.com">
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<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;color:#000000">Dear
Tnsys users,</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;color:#000000"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;color:#000000">I
would like to know how to insert the previous value in an
equation depending on time. For example to program the
following equation : <b><i>RH(i) = RH(i-1) * Constant</i></b>;
where RH is Relative Humidity of a zone. How to program the
RH(i-1) in the equation block ?</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;color:#000000"><br>
</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;color:#000000">Thanks
in advance.</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;color:#000000">Best,</div>
<div class="gmail_default"
style="font-family:arial,helvetica,sans-serif;color:#000000">Ismail</div>
<br clear="all">
<div><br>
</div>
-- <br>
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<div dir="ltr"><i
style="font-size:10.6667px;color:rgb(0,0,0);font-family:Arial,sans-serif">************************************************</i></div>
<div dir="ltr"><i
style="font-size:10.6667px;color:rgb(0,0,0);font-family:Arial,sans-serif">Ismail
OUHALLOU</i><br>
</div>
<div dir="ltr">
<div><font face="Arial,
sans-serif" color="#000000"><span
style="font-size:10.6667px">Green building & Sustainability
consultant</span></font></div>
<div><br>
</div>
<div><font face="Arial,
sans-serif" color="#000000"><span
style="font-size:10.6667px"><b>Morocco</b></span></font></div>
<div><span
style="color:rgb(0,0,0);font-family:Arial,sans-serif;font-size:10.6667px">P:+212<b>
</b>620<b> </b>548<b> </b>116</span></div>
<div><font face="Arial,
sans-serif" color="#000000"><span
style="font-size:10.6667px">F:+212<b> </b>522<b> </b>326<b> </b>440</span></font></div>
<div><a
href="mailto:i.ouhallou@trusted-energy.com"
target="_blank"
moz-do-not-send="true"><font
style="background-color:rgb(238,238,238)" size="1">i.ouhallou@trusted-energy.com</font></a><br>
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<div><a
href="mailto:issmail.ouhallou@gmail.com"
target="_blank"
moz-do-not-send="true"><font
style="background-color:rgb(238,238,238)" size="1">issmail.ouhallou@gmail.com</font></a><br>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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