Allen-Bradley LOGIX 5000 Reference Manual page 337

Filter
Operands
Function Block
Operand Type
NTCH tag FILTER_NOTCH
FILTER_NOTCH Structure
Input Parameter Data Type Description
EnableIn BOOL
In REAL
Initialize BOOL
WNotch REAL
QFactor REAL
Order REAL
TimingMode DINT
OversampleDT REAL
RTSTime DINT
RTSTimeStamp DINT
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Format Description
Structure NTCH structure
Enable input. If false, the instruction does not execute and outputs are not
updated.
Default is true.
The analog signal input to the instruction.
Valid = any float
Default = 0.0
Request to initialize filter control algorithm. When true, the instruction sets Out
= In.
Default is false.
The filter center frequency in radians/second. If WNotch < minimum or
WNotch > maximum, the instruction sets the appropriate bit in status and
limits WNotch.
Valid = see Description section below for valid ranges
Default = maximum positive float
Controls the width and depth ratio. Set QFactor = 1 / (2*desired damping
factor). If QFactor < minimum or QFactor > maximum value, the instruction
sets the appropriate bit in Status and limits QFactor.
Valid = 0.5 to 100.0
Default = 0.5
Order of the filter. Order controls the sharpness of the cutoff. If Order is invalid,
the instruction sets the appropriate bit in Status and uses Order = 2.
Valid = 2 or 4
Default = 2
Selects timing execution mode.
0 = Periodic mode
1 = Oversample mode
2 = Real time sampling mode2
For more information about timing modes, see Function Block Attributes.
Valid = 0 to 2
Default = 0
Execution time for oversample mode.
Valid = 0 to 4194.303 seconds
Default = 0
Module update period for real time sampling mode
Valid = 1 to 32,767ms
Default = 1
Module time stamp value for real time sampling mode.
Valid = 0 to 32,767ms
Default = 0
Chapter 3
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