[TRNSYS-users] Iwent your help

[David Bradley]

Habtamu,
  I am not sure that I follow exactly what you are trying to 
accomplish. However, two thoughts might help you. First, TRNSYS 
iterates automatically in order to find its solution at the current 
time step. The seventh spot in the INFO() array carries the iteration 
number at the current call. If INFO(7) = 2 then the component has 
been called three times so far this time step (one initial call and 
two iterative calls). You could add some code that says something like:

IF (INFO(7).EQ.0) THEN
  calculate the output using the initially assumed values
ELSE
  calculate the output using the last calculated values
ENDIF

Often times, however, it is important to continue calculating the 
final value of an output based not on the last calculated value but 
based on the final value of that output at the previous time step. In 
order to accomplish that, it is best to use the functions 
getStorageVars() and setStorageVars(). Information on the use of 
those functions can be found in the 08-Programmers Guide manual.
Kind regards,
  David


At 10:09 8/6/2007, habtamu tkubet wrote:
>I went to add a new component and b/s of your help I make it 
>perfectly and now I will need another help that is I wrote the 
>equation of the new component and I went to calculate the output 
>with initially assumed value in other word I went to use the output 
>of the firest will be the input of the second iteration so any one 
>besides you having a knowdlege of fortrun pleese help me .
>
>the equation will be as followes
>  by using this equation you can calculate the initial value of
>p1,Tg11,Tg21,Tf11 and Tf21 so I went to use this valu as input How 
>can I use it
>

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