Allen-Bradley LOGIX 5000 Reference Manual page 98

Chapter 1 Process Control Instructions
CV Percent Limiting
The following diagram illustrates how the instruction determines CV percent
limiting.
(1) During instruction first scan, the instruction clears the alarm outputs.
CV High/Low Limiting
The instruction always performs alarming based on CVHLimit and CVLLimit.
Limit CV by CVHLimit and CVLLimit when in auto or cascade/ratio mode.
When in manual mode, limit CV by CVHLimit and CVLLimit when
CVManLimiting is set. Otherwise limit CV by 0 and 100 percent.
(1) During instruction first scan, the instruction clears the alarm outputs.
98 Rockwell Automation Publication 1756-RM006K-EN-P - November 2018