Allen-Bradley LOGIX 5000 Reference Manual page 321

Filter
DERIVATIVE Structure
Input Parameter Data Type
EnableIn BOOL
In REAL
Gain REAL
ByPass BOOL
TimingMode DINT
OversampleDT REAL
RTSTime DINT
RTSTimeStamp DINT
Output Parameter Data Type
EnableOut BOOL
Out REAL
DeltaT REAL
Status DINT
InstructFault (Status.0) BOOL
TimingModeInv BOOL
(Status.27)
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Description
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
Derivative multiplier
Valid = any float
Default = 1.0
Request to bypass the algorithm. When
ByPass is true, the instruction sets Out = In.
Default is false.
Selects timing execution mode.
0 = periodic mode
1 = oversampling mode
2 = Real time sampling mode
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
Description
Indicates if instruction is enabled. Cleared to
false if Out overflows.
The calculated output of the algorithm.
Elapsed time between updates. This is the
elapsed time in seconds used by the control
algorithm to calculate the process output.
Status of the function block.
The instruction detected one of the following
execution errors. This is not a minor or major
controller error. Check the remaining status
bits to determine what occurred.
Invalid TimingMode value.
For more information about timing modes,
see Function Block Attributes.
Chapter 3
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