Rockwell Automation Publication 1756-RM006K-EN-P - November 2018 331
FILTER_LOW_PASS Structure
Input Parameter Data Type Description
EnableIn BOOL Enable input. If false, the instruction does not
execute and outputs are not updated.
Default is true.
In REAL The analog signal input to the instruction.
Valid = any float
Default = 0.0
Initialize BOOL Request to initialize filter control algorithm.
When true, the instruction sets Out = In.
Default is false.
WLag REAL The lag frequency in radians/second. If WLag
< minimum or WLag > maximum, the
instruction sets the appropriate bit in Status
and limits WLag.
Valid = see Description section below for valid
ranges
Default = 0.0
Order REAL 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 = 1.
Valid = 1 to 3
Default = 1
TimingMode DINT Selects timing execution mode.
0 = Period mode
1 = Oversample mode
2 = Real-time sampling mode
For more information about timing modes, see
Function Block Attributes.
Valid = 0 to 2
Default = 0
OversampleDT REAL Execution time for oversample mode.
Valid = 0 to 4194.303 seconds
Default = 0
RTSTime DINT Module update period for real time sampling
mode
Valid = 1 to 32,767ms
Default = 1
RTSTimeStamp DINT Module time stamp value for real time
sampling mode.
Valid = 0 to 32,767ms
Default = 0