[TRNSYS-users] PID Controller

[David Bradley]

Jace,
  There is no fundamental incompatibility. Type647 expects a value 
between 0 and 1 and the way you have your PID set up, it sounds like it 
is outputting a value between 0 and 1. Bear in mind that Type647 does 
not automatically divert the remainder of the flow to the other port. If 
you have two outlets and all the flow that does not go one direction 
automatically goes the other way, you might consider using Type11-f. And 
no, this is not the first time I have ever recommended using a standard 
Type in place of a TESS Type... :-)
Best,
  David


On 5/4/2010 00:51, LE GALL, Jace wrote:
>
> Dear TRNSys users,
>
> I am currently using a PID Controller to modulate the water flow in a 
> chilling installation. The control signal varies from 0 to 1 
> accordingly to the temperature of the air I want to control but it 
> does not have any impact on the Type647 valve I have used to divert 
> the flow. I therefore have no regulation at all (waterflow remains 
> constant). Do you know if there is any incompatibility between these 2 
> types (no message of compatibility problem between output and input is 
> shown)?
>
> Thank you for your help.
>
> Best regards
>
> Jace LE GALL
>
> BYME Engineering Hub
>
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