HEX control

File: HEX.doc

Last edition: 4 of March 2003

Author: Mikael Krantz

History: 96-02-13/MK First released version.

96-10-03/MK Updated to Menta 1.20

97-09-02/MK Updated to Menta 3.0

98-03-09/MK Unit corrected.

98-12-30/MK New filename

2003-03-04/MK Updated to Menta 4.0

Description

Heat exchanger (HEX) are controlled from the measured value and setpoint value for the supply air. By the "NormalControl" flag, it is possible to start and stop the controlling. By the "HEXMax" flag, it is possible to maximum the controlling signal. If both "NormalControl" flag and "HEXMax" are false the controller signal goes to minimum.

Inputs

(Real) SP supply temperature, °C.

(Real) Supply temperature, °C.

(Binary) Normal control

(Binary) HEX max

Outputs

(Real) HEX-control signal, %.

Parameters

(Real) HEXTravelTime 180 seconds

(Real) HEXITime 4 minutes

(Real) HEXPBand 25 °C

Public signals

(Real) HEXPBand

(Real) HEXITime

(Real) HEX

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