Re: [TRNSYS-users] Equation

[Wouter Lumen <wouter.lumen@ugent.be>]

Liam,

You could try to translate the "if else" structures into boolean expressions:

and(,) or(,) eql(,) are other logical operators that can be used  
besides gt(,) and lt(,). (they all take 2 arguments).
These are operators used in fortran if i'm not mistaken.

You can put these together in something like:

and(gt(condition1),lt(condition2))*output1 +  
and(eql(condition3),eql(condition4))*ouput2

Another possibility is writing your own component in C++, in which you can
use "if else" and other logical structures.

Hope this helps.

kind regards,

Wouter

Citeren Liam O'Brien <obrien_liam@hotmail.com>:

> Hello All,
>
> Is anyone aware of a good guide for using Equation (i.e. "insert new  
>  equation")?  The only thing I could find in the manual is a 2-pager  
>  in Chapter 2 about Studio.
>
> Basically, what I would like to do is apply some basic controls,   
> like: if condition A do this, if condition B do this, if condition C  
>  do this, else do this.  For example, I would like to set up where   
> the solar-heated air is sent based on various conditions.  I know a   
> single condition can be checked using GT, LT, etc.  But I'd like   
> something slightly more advanced.  Perhaps my approach is not correct.
>
> Any advice would be greatly appreciated.  Thank you.
>
> Liam O'Brien
>
> _________________________________________________________________