Specifications

Chapter 3 - AsconControlLib
111
3-3-12 S2_SPLITMV
FB Prototype S2_SPLITMV
Input parameters
Output parameters
Description This module is an Output station for an Heat/Cool loop, providing the functionalities
the operator needs to interact with the loop. The loop is controlled by one PID, con-
nected downstream to this module; when the PID output value is between [50.0...0]
the cool action is active, when the PID output value is between [50.0...100.0] the
heat action is active. The function block supply, in the output SPLIT_PB, a value of
1.0 when heat action is actuated and the value of RCGA when cool action is actu-
ated; to obtain the right process regulation to the PB input of the PID Block must be
passed the PB calculated for the heat process regulation divided by the SPLIT_PB
value.
By a set of digital inputs the S2_SPLITMV_VAL function block provides auto/manual/
track/aux operating mode as listed above, ordered according to their priority level.
Trk DTRK
AutoMan DAM
Aux DAUX
Input Type Description
MV REAL
Controlled variable (also named manipulated variable).
It is generated by the PID module with range [0 … 100.0]
DBND REAL Deadband, with range from [-10.0 … +10.0]
RCGA REAL Relative Cool Gain
DTRK BOOL Digital Tracking Command
TRK REAL Tracking signal [0…100.0]
DAM BOOL Digital AutoMan Command
AM_VAL REAL Manual Value [0 … 100.0]
DAUX BOOL Digital Auxiliary Command
AUX REAL Auxiliary Signal [0…100.0]
Output Type Description
OUTH REAL Control Output for HEAT [0 … 100.0]
OUTC REAL Control Output for COOL [0 … 100.0]
OUTHC REAL Control Output for visualization [-100.0 … 100.0]
BMP_MV REAL BUMPLESS output value
DBMP BOOL BUMPLESS command
OVERLAP BOOL Active if both OUTH and OUTC are active
SPLIT_PB REAL
Correction factor for PB to obtain a PB value for the PID to
apply cool action
MV
DBND
RCGA
DTRK
TRK
DAM
AM_SL
DAUX
AUX
REAL
REAL
REAL
BOOL
REAL
BOOL
BOOL
BOOL
REAL
¡
¡
¡
¡
¡
¡
¡
¡
¡
REAL
REAL
REAL
REAL
BOOL
BOOL
REAL
OUTH
OUTC
OUTHC
BMP_MV
DBMP
OVERLAP
SPLIT_PB
¡
¡
¡
¡
¡
¡
¡