Allen-Bradley LOGIX 5000 Reference Manual page 339

Filter
Parameter
WNotch second order
LowLimit
WNotch fourth order
LowLimit
HighLimit
QFactor
Whenever the value computed for the output is invalid, NAN, or
instruction sets Out = the invalid value. When the value computed for the output
becomes valid, the instruction initializes the internal parameters and sets Out =
In.
Affects Math Status Flags
No
Major/Minor Faults
None specific to this instruction. See Common Attributes for operand-related
faults.
Execution
Function Block
Condition/State
Prescan
Tag.EnableIn is false
Tag.EnableIn is true
Instruction first run
Instruction first scan
Postscan
Structured Text
Condition/State
Prescan
Normal Execution
Postscan
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Limitations
LowLimit = 0.5
HighLimit = 100.0
Action Taken
EnableIn and EnableOut bits are cleared to false.
EnableIn and EnableOut bits are cleared to false.
EnableIn and EnableOut bits are set to true.
The instruction executes.
N/A
Recalculate coefficients.
EnableIn and EnableOut bits are cleared to false.
Action Taken
See Prescan in the Function Block table.
See Tag.EnableIn is true in the Function Block table.
See Postscan in the Function Block table.
Chapter 3
INF, the
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