[TRNSYS-users] Excel iteration vs TRNSYS iteration

[David BRADLEY]

Karol,

  My apologies for forgetting to answer that part. TRNSYS waits for 
Excel to complete before it goes on.

kind regards,

  David



On 03/07/2018 00:30, Karol Bandurski wrote:
>
> David,
>
> Thenks!
>
> So onion exchange.
>
> The question remains: does TRNSYS wait on Excel calculation/interation 
> or “tear out” data when they are needed, even if iteration are still 
> running?
>
> Regards,
>
> Karol
>
> *From:*David BRADLEY [mailto:d.bradley at tess-inc.com]
> *Sent:* Monday, March 5, 2018 10:19 PM
> *To:* TRNSYS users mailing list at OneBuilding.org
> *Cc:* Karol Bandurski
> *Subject:* Re: [TRNSYS-users] Excel iteration vs TRNSYS iteration
>
> Karol,
>
>  As far as I am aware TRNSYS has no knowledge of that is going on in 
> Excel. Trnsys calls Excel, waits for Excel to return something and 
> then proceeds on with calling the next component. If the system of 
> Trnsys components did not converge then Trnsys iterates again and 
> calls Excel again. I think that means that it an onion type of coupling.
>
> kind regards,
>
>  David
>
> On 03/02/2018 07:42, Karol Bandurski via TRNSYS-users wrote:
>
>     Dear All,
>
>     I am considering to couple TRNSYS and Excel model. My excel model
>     is based on “circular reference” so to calculate excel make some
>     iteration.
>
>     1)Does TRNSYS respect it? I mean: does TRNSYS will wait with the
>     next time step or iteration on excel calculation or TRNSYS take
>     what is in given moment written in excel (even if iteration is
>     running)?
>
>     2)Does TRNSYS – Excel coupling is onion or ping-pong type? I mean:
>     does TRNSYS – excel data exchange is each iteration or each time
>     step?
>
>     Regards,
>     Karol
>
>     --------------------------------------------------------------------
>
>     Karol BANDURSKI M. Sc.
>
>     Faculty of Civil and Environemntal Engeneering
>
>     Division of Heating, Air Conditioning and Air Protection
>
>     Poznan University of Technology
>
>     https://www.researchgate.net/profile/Karol_Bandurski
>
>     www.put.poznan.pl/~karol.bandurski
>     <http://www.put.poznan.pl/%7Ekarol.bandurski>
>
>
>
>
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>
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>
>
>
> -- 
> ***************************
> David BRADLEY
> Principal
> Thermal Energy Systems Specialists, LLC
> 22 North Carroll Street - suite 370
> Madison, WI  53703 USA
> P:+1.608.274.2577
> F:+1.608.278.1475
> d.bradley at tess-inc.com <mailto:d.bradley at tess-inc.com>
> http://www.tess-inc.com
> http://www.trnsys.com

-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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