Allen-Bradley LOGIX 5000 Reference Manual page 367

Select_Limit Instructions
TimingMode DINT
OversampleDT REAL
RTSTime DINT
RTSTimeStamp DINT
Output Data Type
Parameter
EnableOut BOOL
Out REAL
DeltaT REAL
Status DINT
InstructFault BOOL
(Status.0)
IncRateInv BOOL
(Status.1)
DecRateInv BOOL
(Status.2)
TimingModeInv BOOL
(Status.27)
RTSMissed BOOL
(Status.28)
RTSTimeInv BOOL
(Status.29)
RTSTimeStampInv BOOL
(Status.30)
DeltaTInv BOOL
(Status.31)
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Selects timing execution mode.
0 = Period mode
1 = oversample mode
2 = real time sampling mode
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.
IncRate < 0. The instruction uses 0.
DecRate < 0. The instruction uses 0.
Invalid TimingMode value.
For more information about timing modes,
see Function Block Attributes.
Only used in real time sampling mode. Set
to true when
ABS(DeltaT – RTSTime) > 1 millisecond.
Invalid RTSTime value.
Invalid RTSTimeStamp value.
Set to true in oversample mode if either
DeltaT <= 0 or DeltaT > 4194.303.
Chapter 4
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