David and Werner
That is an interesting suggestion. If you have two equations with
the same name in your input file, TRNSYS should catch that and give
you an error saying so when you run the simulation. Its not always
easy to find where the duplicate equations are; I typically open the
*.dck itself from the Studio and then search for the name of the
offending equation, then note the name of the equation block that it
was found in.
One other thing to note though: while equation names cannot be
duplicated, a variable can be used in more than one equation block.
For example, the following is perfectly okay (note that the second
equation block uses the results of the first equation block. as a
side note, NO link needs to be drawn between the two equation blocks
in the Studio!):
* EQUATIONS "equation block 1"
*
EQUATIONS 2
myEqn1 = 0.0
myEqn2 = myEqn1+4
*$UNIT_NAME equation block 1
*$LAYER Main
*$POSITION 565 779
* EQUATIONS "equation block 2"
*
EQUATIONS 1
myEqn3 = myEqn1+myEqn2
*$UNIT_NAME equation block 2
*$LAYER Main
*$POSITION 500 700
On 7/20/2011 10:53, keilholz, werner wrote:
Thanks David for this suggestion.
In the meantime, you can now also use the edit
button in the equation editor and use the replace function
of the text editor.
Werner
Hi,
I wrote an Equation
block (in TRNSYS 17.0.019) which stands for a very simple
fluid heater and I aim to duplicate this block (just
Copy/paste in the Studio) in order to have a new instance of
this object in the same project but connected to another
hydraulic loop with different behavior : when I just
copy/past in the studio, another block is nicely copied, all
equations are written in the deck files but with the same
variable’s names what can not be used as I guessed. In an
object oriented use of this “Equation block”, it would be
nice to have a feature in the studio which ensures an
automatic renaming of the declared variables. Another way is
obviously user component’s writing but not so quick and more
general while the problem was local.
Thanks for your advice,
David
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