Allen-Bradley LOGIX 5000 Reference Manual page 303

Drives
where:
The instruction also limits the value of Out based on the HighLimit and
LowLimit values.
If:
HighLimit LowLimit
Out HighLimit
Out LowLimit
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
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Then:
Out = LowLimit
Integrator = IntegratorLowLimit
HighLowLimsInv is set
HighAlarm is set
LowAlarm is set
Out = HighLimit
IntegratorLowLimit
n-1
HighAlarm is set
Out = LowLimit
Integrator = Integrator
n-1
LowAlarm is set
Action Taken
EnableIn and EnableOut bits are cleared to false.
EnableIn and EnableOut bits are cleared to false.
EnableIn and EnableOut bit is set to true.
The instruction executes.
N/A
The internal parameters and Out are set to 0. Force
recalculation of equation coefficients.
EnableIn and EnableOut bits are cleared to false.
Chapter 2
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