[TRNSYS-users] Help Type 155

[Jeff Thornton]

<What is meant by iterative behaviour? > 

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. 

<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?> 

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. 

<3. What is meant by calls in the timestep? Can I set a certain number
of calls in the timestep?> 

Calss = calling a component to solve for it's output given the inputs
and parameters. 

Jeff 

---
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 at tess-inc.com

On 04/24/2020 10:07 am, MUGNINI ALICE via TRNSYS-users wrote: 

> Dear TRNSYS users, 
> 
> I'm trying to link Matlab 2014 to Trnsys 17 with Type 155. 
> 
> I have some doubts about the parameter 4 (callingMode). In the description it is reported that it describes the iterative behavior of the component: 
> 
> - callingMode 0: Standard Iterative component (called at each call of each time step) 
> - callingMode 10: Real-time controller (called at the end of each time step, after integrators and printers). 
> 
> What is not clear to me is: 
> 
> 1. What is meant by iterative behaviour? 
> 
> 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? 
> 
> 3. What is meant by calls in the timestep? Can I set a certain number of calls in the timestep? 
> 
> I hope you can help me. 
> 
> Best regards, 
> 
> Alice Mugnini 
> 
> _ _ 
> 
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> TRNSYS-users at lists.onebuilding.org
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