Specifications

Chapter 3 - AsconControlLib
99
3-3-3 S2_TNATFREQ
FB Prototype S2_TNATFREQ
Input parameters
Output parameters
Description This function block is able to perform the tuning calculation using the Natural
frequency algorithm. It works together a P.I.D. block with which shares the inputs
and the outputs from and for the process. Please note that these process
parameters are using the range [0… 100.0]. The method has the advantage of a
better accuracy in term of calculation with a reasonable speed calculation.
Input Type Description
ENABLE BOOL Function block enable
SP REAL Setpoint value [0…100.0]
MEAS REAL Measure value [0…100.0]
ACT_TYPE BOOL PID action type
OUTLO REAL Lo value for OUT output [0…100.0]
OUTHI REAL Hi value for OUT output [0…100.0]
Output Type Description
TOUT REAL Function block output [OUTLO…OUTHI]
TPB REAL Calculated proportional band [%]
TTI REAL Calculated integral time [s]
TTD REAL Calculated derivative time [s]
TDBMP BOOL Bumpless command for the PID
TRUNNING BOOL Running flag
TVALID BOOL Successful tuning calculation flag
ENABLE
SP
MEAS
ACT_TYPE
OUTLO
OUTHI
BOOL
REAL
REAL
BOOL
REAL
REAL
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REAL
REAL
REAL
REAL
BOOL
BOOL
BOOL
TOUT
TPB
TTI
TTD
TDBMP
TRUNNING
TVALID
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¡
¡
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Natural frequency
PV variable
Control
output
tuning start
End of the tuning
operating and
setting of the new
calculated terms