Re: [TRNSYS-users] PID Controller

David,

I had thought of this problem so I tried using a ‘parameters’ to create a second signal opp = 1 - control_signal that I’ve set as an input on the other port but it was still useless. Fortunately, it worked when I changed to a Type11-f. So your advice would be to use the standard types as often as possible (I am an new TRNSys user)?

Thank you for your helpful response,

Best regards,

Jace LE GALL

BYME Engineering Hub

From: David Bradley [mailto:bradley@tess-inc.com]
Sent: Wednesday, May 05, 2010 5:45 AM
To: LE GALL, Jace
Cc: trnsys-users@cae.wisc.edu
Subject: Re: [TRNSYS-users] PID Controller

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

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