Hello everybody
I was trying to follow the trnsys guide line to create the new
components in simulation studio. I faced problems in compiling the exported
fortran skeleton. Regarding to trnsys instruction “creating new
component” in page 1-65 of the manual “Getting started”; I
was looking for right place to add the equation in the fortran skeleton. After
search and asking trnsys users I have got it and I think every beginner in trnsys
would face the same.
I hope it helps.
Simple example: Generation
of a new component via simulation studio
Generation of the component which is able to evaluate this equation:
Opt = inp + par
Input: inp
Output: opt
Parameter: par
- First we have to
follow the instruction of “creating new component” which has
been mentioned in page 1-65 of trnsys manual “Getting
started”.
- This instruction
should be followed up to the end of exporting the new component to fortran.
- When the fortran Skelton
is coming up in CVF 6.6B the desired equation should be written along with
some modifications.
- in page 1-68 of
transys instruction “Getting started” it has been mentioned
the desired equation has to be replaced with question marks “ ?
“ in the fortran skeleton but there is no sign of question mark
in trnsys 17 and CVF6.6B
- For this simple
example we have to add our desired equation just after this comment
“! Perform All of the Calculations Here to Set the Outputs from the
Model Based on the Input”. We have to write opt=inp+par
- Moreover, when the
output is calling we have to put our output instead of default value which
already is 0.
Call SetOutputValue(1, 0) ! opt
Call SetOutputValue(1, opt)
- Finally in
declaration part of the script “!Trnsys Declarations” we
have to define the output by writing this script “DOUBLE PRECISION
opt”
- Now the new
component would be successfully compiled.
Finally as attached you
can find two fortran program as references:
1- The
automatically exported fortran script in CVF6.6b from simulation studio without
modification which could not be compiled
2- Modified
script which could be compiled (the modifications are highlighted)
Thanks to David Bradley, Stefan Thiemann and Jaime
Gonzalez Rodriguez for their replies.
Regards
Mehdi Shahrestani