[TRNSYS-users] How to pass variable defined by equation to parameters

[Jeff Thornton]

Don't use Type 9 to read in the values as they are then set as time dependent variables and since the length is a parameter (time independent) it gets set once and only once - before Type 9 reads the values.  Instead use an INCLUDE statement and set the variables as equations/constants in the include file.

Jeff Thornton
TESS

Sent from my iPhone

> On Oct 30, 2014, at 10:51 PM, Yuichi Yasuda <yasuda at qcd.co.jp> wrote:
> 
> Dear Dr. Yoshinaga,
> 
> I'm digging into the source code of the type31. The type checks the
> parameters at START TIME.
> I guess that the type9 has not begun to read data file at this stage.
> So, as a result, the variable is treated as default (=0) and causes the
> error you reported.
> 
> Does anyone has workarounds?
> 
> Best regards,
> 
> Yuichi Yasuda
> 
> 
> (2014/10/31 10:59), 吉永 美香 wrote:
>> Dear Sasuda-san,
>> Nice to hear you. Thanks for your comment.
>> Yes, I selected "string" as unit and, additionally, optimised the order 
>> of the components.
>> I attached very simple sample that creates error #125.
>>> TRNSYS Message    125 : The referenced Unit has a bad parameter value.
>>> Reported information  : Parameter # 2, Reported Problem: The pipe 
>> length must be greater than 0.
>> Best regards,
>> Mika
>> ===================================
>> Dr. Mika Yoshinaga
>> Associate Professor
>> Meijo University
>> Shiogamaguchi1-501,Tempaku, Nagoya
>> Phone: +52-838-2385
>> Email: yoshi at meijo-u.ac.jp <mailto:yoshi at meijo-u.ac.jp>
>> ===================================
>> 
>> 2014-10-31 10:19 GMT+09:00 Yuichi Yasuda <yasuda at qcd.co.jp 
>> <mailto:yasuda at qcd.co.jp>>:
>> 
>>    Dr. Yoshinaga,
>> 
>>    If you want to use the variable as a parameter, you have to choose
>>    'String' for the unit.
>> 
>>    Yuichi Yasuda
>>    Quattro Corporate Design
>> 
>>    (2014/10/30 18:35), 吉永 美香 wrote:
>>> Dear all,
>>> Does anyone know the way to pass some variables which are defined by
>>> "equation" to parameters? I want to give them from an external
>>    file via
>>> type9.
>>> 
>>> Actually, we can see this example in the project semi-automatically
>>> created with TRNSYS 3D. Type 15(Weather data) has a variable named
>>> "AA_H_0_0" on parameter field and it is defined in an "equation".
>>    So I
>>> thought it is easy thing.
>>> 
>>> But I tried this in generic types, for example Parameters#2(pipe
>>    length)
>>> of type31(pipe), and the simulation would stop with error saying the
>>> parameter is invalid.
>>> 
>>> Thanks in advance.
>>> 
>>> Best regards,
>>> Mika
>>> ===================================
>>> Dr. Mika Yoshinaga
>>> Associate Professor
>>> Meijo University
>>> Shiogamaguchi1-501,Tempaku, Nagoya
>>> Phone: +52-838-2385
>>> Email: yoshi at meijo-u.ac.jp <mailto:yoshi at meijo-u.ac.jp>
>>    <mailto:yoshi at meijo-u.ac.jp <mailto:yoshi at meijo-u.ac.jp>>
>>> ===================================
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> TRNSYS-users mailing list
>>> TRNSYS-users at lists.onebuilding.org
>>    <mailto:TRNSYS-users at lists.onebuilding.org>
>>> 
>>    http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>>> 
>> 
>>    _______________________________________________
>>    TRNSYS-users mailing list
>>    TRNSYS-users at lists.onebuilding.org
>>    <mailto:TRNSYS-users at lists.onebuilding.org>
>>    http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>> 
>> 
>> 
>> 
>> _______________________________________________
>> TRNSYS-users mailing list
>> TRNSYS-users at lists.onebuilding.org
>> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>> 
> 
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at lists.onebuilding.org
> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org