Allen-Bradley LOGIX 5000 Reference Manual page 108

Chapter 1 Process Control Instructions
SPPercent is invalid
The CloseOut is pulsed whenever SP < Position feedback. When this occurs, the
instruction sets OpenTime = 0 and the duration for which CloseOut is to be
turned on is calculated as:
If CloseTimen-1 < CycleTime, then add Deadtime to CloseTime.
If CloseTime > MaxOnTime, then limit to MaxOnTime.
If CloseTime < MinOnTime, then set CloseTime to 0.
If any of the following conditions exist, CloseOut will not be pulsed and
CloseTime will be cleared to 0.0.
ClosedFB is true or PositionPercent 0
CycleTime = 0
CloseRate = 0
SPPercent is invalid
OpenOut and CloseOut will not be pulsed if SPPercent equals PositionPercent.
Both OpenTime and CloseTime will be cleared to false.
Affects Math Status Flags
No
Major/Minor Faults
None specific to this instruction. See Common Attributes for operand-related
faults.
108 Rockwell Automation Publication 1756-RM006K-EN-P - November 2018