[TRNSYS-users] Problem with Type 55: Periodic Integrator - reset time

[David Bradley]

Eric,
  I think your parameter set has some overlapping intervals.

- parameter 5 determines when the input resets to zero (in your case, it 
is resetting daily at midnight)
- parameter 2 determines when in that 24 hour period the integrator 
starts paying attention (by setting it to 1, it is ignoring the fist 
hour in the 24 hour period)
- parameter 3 determines how long the input should be evaluated (by 
setting it to 24 and starting at 1, you're progressively evaluating one 
hour longer than your reset time each day of the simulation (1+24 = 25...)

try setting parameter 2 to 0 and see if that cures the problem. I'm not 
sure why it is behaving properly when you start a new project.
Best,
  David


On 7/20/2010 20:25, Eric Wilson wrote:
> Hi all,
>
> In a project of mine, none of my Type 55 integrators reset after a 
> cycle as they should (they continue to integrate until the end of the 
> simulation), unless they are set to a monthly cycle with a value of 
> -1. In a blank new project, they work fine.  Has anyone encountered 
> this problem?
>
> * Model "Type55" (Type 55)
> *
>
> UNIT 78 TYPE 55     Type55
> *$UNIT_NAME Type55
> *$MODEL .\Utility\Integrators\Periodic Integrator\Type55.tmf
> *$POSITION 815 50
> *$LAYER Main #
> PARAMETERS 7
> 1        ! 1 Integrate or sum input
> 1.0        ! 2 Relative starting hour for input
> 24        ! 3 Duration for input
> 24        ! 4 Cycle repeat time for input
> 24        ! 5 Reset time for input
> start        ! 6 Absolute starting hour for input
> stop        ! 7 Absolute stopping hour for input
> INPUTS 1
> supply_diam        ! HVAC_Inputs:supply_diam ->Input
> *** INITIAL INPUT VALUES
> 0.
>
> Many thanks,
> Eric
>
> --
> Eric Wilson
> M.S. Candidate, Building Systems Program
> Dept of Civil, Env., and Arch. Engineering
> University of Colorado at Boulder
>
>
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>    

-- 
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David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
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