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<p><<span>What is meant by iterative behaviour? ></span></p>
<p><span>The TRNSYS solver uses an iterative scheme to solve for the dynamic solution. I urge you to read the documentation so you have an idea of how it works.</span></p>
<p><span> </span></p>
<p><span><2. Does callingMode 0 call Matlab at the beginning of the timestep, and the outputs of Matlab are used as inputs of the current TRNSYS timestep?></span></p>
<p><span>Nope - setting it to zero means that it will be called every time that one of the inputs to the component have changed; which will update it's outputs and the components connected to those outputs will then be called. This can happen many, many times during a timestep. Mode 10 would only call MATLAB at the end of each timestep once everything else has solved. Components connected to MATLAB at the next timestep would then use the outputs from the MATLAB component at the previous call with no iteration.</span></p>
<p><span> </span></p>
<p><span><3. What is meant by calls in the timestep? </span><span><span>Can I set a certain number of calls in the timestep?></span></span></p>
<p><span><span>Calss = calling a component to solve for it's output given the inputs and parameters.</span></span></p>
<p><span><span> </span></span></p>
<p><span><span>Jeff</span></span></p>
<p> </p>
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<pre>---<br />Jeff Thornton
President - TESS LLC
3 N. Pinckney Street, Suite 202, Madison WI USA 53703
Office: (608) 274-2577 Fax: (608) 278-1475
www.tess-inc.com
E-Mail: thornton@tess-inc.com
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<p>On 04/24/2020 10:07 am, MUGNINI ALICE via TRNSYS-users wrote:</p>
<blockquote type="cite" style="padding-left:5px; border-left:#1010ff 2px solid; margin-left:5px"><!-- html ignored --><!-- head ignored --><!-- meta ignored -->
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<p style="text-align: left; margin: 0cm 0cm 5pt; font-size: 11pt; font-family: Calibri, sans-serif; line-height: normal; background: white;"><span style="font-size: 12pt; font-family: 'Times New Roman', Times, serif; color: #222222;">Dear TRNSYS users,</span><span style="font-family: 'Times New Roman', Times, serif; font-size: 12pt;"> </span></p>
<p style="text-align: left; margin: 0cm 0cm 5pt; font-size: 11pt; font-family: Calibri, sans-serif; line-height: normal; background: white;"><span style="font-family: 'Times New Roman', Times, serif; font-size: 12pt;"> </span></p>
<p style="text-align: left; margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; line-height: normal;"><span style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;">I'm trying to link Matlab 2014 to Trnsys 17 with Type 155. </span></p>
<p style="text-align: left; margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; line-height: normal;"><span style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;"> </span></p>
<p style="text-align: left; margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; line-height: normal;"><span style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;">I have some doubts about the parameter 4 (callingMode). In the description it is reported that it describes the </span><span style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;">iterative behavior of the component: </span></p>
<p style="margin: 0cm 0cm 8pt; line-height: normal; font-size: 11pt; font-family: Calibri, sans-serif; margin-bottom: .0001pt;"> </p>
<div style="text-align: left;"><span style="color: #000000; font-size: 12pt; font-family: 'Times New Roman', Times, serif;">- callingMode 0: Standard Iterative component (called </span><span style="color: #000000; font-size: 12pt; font-family: 'Times New Roman', Times, serif;">at each call</span><span style="color: #000000; font-size: 12pt; font-family: 'Times New Roman', Times, serif;"> of each time step)</span></div>
<div style="text-align: left;"><span style="font-family: 'Times New Roman', Times, serif; font-size: 12pt;">- callingMode 10: Real-time controller (called at the end of each time step, after integrators and printers).</span></div>
<div style="text-align: left;"><span style="font-family: 'Times New Roman', Times, serif; font-size: 12pt;"> </span></div>
<p> </p>
<p style="text-align: left; margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; line-height: normal;"><span style="font-family: 'Times New Roman', Times, serif; font-size: 12pt;">What is not clear to me is:</span></p>
<p style="text-align: left; margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; line-height: normal;"><span style="font-family: 'Times New Roman', Times, serif; font-size: 12pt;">1. What is meant by iterative behaviour? </span></p>
<p style="text-align: left; margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; line-height: normal;"><span style="font-family: 'Times New Roman', Times, serif; font-size: 12pt;">2. Does callingMode 0 call Matlab at the beginning of the timestep, and the outputs of Matlab are used as inputs of the current TRNSYS timestep?</span></p>
<p style="text-align: left; margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; line-height: normal;"><span style="font-family: 'Times New Roman', Times, serif; font-size: 12pt;">3. What is meant by calls in the timestep? </span><span><span style="font-family: 'Times New Roman', Times, serif; font-size: 12pt;">Can I set a certain number of calls in the timestep?</span></span><span style="font-size: 10.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; mso-fareast-theme-font: minor-fareast; mso-bidi-font-style: italic;"></span></p>
<p style="text-align: left; margin: 0cm 0cm 8pt; line-height: 107%; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font-size: 10.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; mso-fareast-theme-font: minor-fareast; mso-bidi-font-style: italic;"><!-- o ignored --><span style="font-family: 'Times New Roman', Times, serif; font-size: 12pt; line-height: normal;"> </span></span></p>
<p style="text-align: left; margin: 0cm 0cm 8pt; line-height: 107%; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font-size: 10.0pt; font-family: 'Times New Roman',serif; mso-fareast-font-family: 'Times New Roman'; mso-fareast-theme-font: minor-fareast; mso-bidi-font-style: italic;"><!-- o ignored --><span style="font-family: 'Times New Roman', Times, serif; font-size: 12pt; line-height: normal;">I hope you can help me. </span></span></p>
<p style="text-align: left; margin: 0cm 0cm 8pt; line-height: 107%; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font-family: 'Times New Roman', Times, serif; font-size: 12pt;">Best regards,</span></p>
<p style="text-align: left; margin: 0cm 0cm 8pt; line-height: 107%; font-size: 11pt; font-family: Calibri, sans-serif;"><span style="font-size: 12pt; font-family: 'Times New Roman', Times, serif; line-height: normal;">Alice Mugnini</span></p>
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