Specifications

sigmadue - IEC 61131-3 Function Block Library
104
3-3-8 S2_HC_TFUZZY
FB Prototype S2_HC_TFUZZY
Input parameters
Output parameters
Description This function block is able to perform a tuning calculation selecting the best
method according to the process conditions
for a double action process (“heat and
cool”) . The possible algorithms are the “ Step Response ” or the “ Natural Fre-
quency
” (please refer to the specific documentation), and the FB selects the first if
the PV is far from the setpoint more then 5% (at the moment of the run command),
or the second in the other cases. It works together a PID block with which shares
the inputs and the outputs from and for the process and an automatic/manual sta-
tion with
Split Range capability . Please note that these process parameters are
using the range [0...100.0].
Input Type Description
ENABLE BOOL Function block enable
SP REAL Setpoint value [0…100.0]
MEAS REAL Measure value [0…100.0]
OUTH_HI REAL Limit value for heat action output [0...100.0]
OUTC_HI REAL Limit value for cool action output [0...100.0]
Output Type Description
TOUT REAL Function block output [OUTC_HI... OUTH_HI]
TPB REAL Calculated proportional band [%]
TTI REAL Calculated integral time [s]
TTD REAL Calculated derivative time [s]
TRCGA REAL Calculated relative cool gain
TBMP BOOL Bumpless command for the P.I.D.
TRUNNING BOOL Running flag
TVALID BOOL Successful tuning calculation flag
ENABLE
SP
MEAS
OUTH_HI
OUTC_HI
BOOL
REAL
REAL
REAL
REAL
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REAL
REAL
REAL
REAL
REAL
BOOL
BOOL
BOOL
TOUT
TPB
TTI
TTD
TRCGA
TBMP
TRUNNING
TVALID
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