Allen-Bradley LOGIX 5000 Reference Manual page 168

Chapter 1 Process Control Instructions
168
CV1ROCNegAlarm BOOL
CV2ROCNegAlarm BOOL
CV3ROCNegAlarm BOOL
SP REAL
SPPercent REAL
SPHAlarm BOOL
SPLAlarm BOOL
PVPercent REAL
E REAL
EPercent REAL
CV1WindupHOut BOOL
CV2WindupHOut BOOL
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
CV1 rate of change alarm indicator.
TRUE when the calculated rate of
change for CV1 exceeds
CV1ROCNegLimit.
CV2 rate of change alarm indicator.
TRUE when the calculated rate of
change for CV2 exceeds
CV2ROCNegLimit.
CV3 rate of change alarm indicator.
TRUE when the calculated rate of
change for CV3 exceeds
CV3ROCNegLimit.
Current setpoint value. The value of
SP is used to control CV when in the
Auto or the PV Tracking mode,
scaled in PV units.
The value of SP expressed in percent
of span of PV.
SPPercent = ((SP − PVEUMin ) *
100) / PVSpan.
PV Span calculation: PVSpan =
( PVEUMax − PVEUMin )
SP high alarm indicator. TRUE when
the SP ≥ SPHLimit.
SP low alarm indicator. TRUE when
the SP ≤ SPLLimit.
PV expressed in percent of span.
PVPercent = (( PV − PVEUMin ) *
100) / PVSpan
PV Span calculation: PVSpan =
( PVEUMax − PVEUMin )
Process error. Difference between SP
and PV, scaled in PV units.
The error expressed as a percent of
span.
CV1 Windup high indicator.
TRUE when either a SP high or CV1
high/low limit has been reached.
This signal will typically be used by
the WindupHIn input to limit the
windup of the CV1 output on a
primary loop.
CV2 Windup high indicator.
TRUE when either a SP high or CV2
high/low limit has been reached.
This signal will typically be used by
the WindupHIn input to limit the
windup of the CV2 output on a
primary loop.