Allen-Bradley LOGIX 5000

Select_Limit Instructions
Chapter 4
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018 367
TimingMode DINT Selects timing execution mode.
0 = Period mode
1 = oversample mode
2 = real time sampling mode
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
Output
Parameter
Data Type Description
EnableOut BOOL Indicates if instruction is enabled. Cleared
to false if Out overflows.
Out REAL The calculated output of the algorithm.
DeltaT REAL Elapsed time between updates. This is the
elapsed time in seconds used by the control
algorithm to calculate the process output.
Status DINT Status of the function block.
InstructFault
(Status.0)
BOOL 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.
IncRateInv
(Status.1)
BOOL IncRate < 0. The instruction uses 0.
DecRateInv
(Status.2)
BOOL DecRate < 0. The instruction uses 0.
TimingModeInv
(Status.27)
BOOL Invalid TimingMode value.
For more information about timing modes,
see Function Block Attributes.
RTSMissed
(Status.28)
BOOL Only used in real time sampling mode. Set
to true when
ABS(DeltaT – RTSTime) > 1 millisecond.
RTSTimeInv
(Status.29)
BOOL Invalid RTSTime value.
RTSTimeStampInv
(Status.30)
BOOL Invalid RTSTimeStamp value.
DeltaTInv
(Status.31)
BOOL Set to true in oversample mode if either
DeltaT <= 0 or DeltaT > 4194.303.