Allen-Bradley LOGIX 5000 Reference Manual page 225

Process Control Instructions
Output Data
Parameters Type
CV3ROCPosAlarm BOOL
CV1ROCNegAlarm BOOL
CV2ROCNegAlarm BOOL
CV3ROCNegAlarm BOOL
SP1 REAL
SP2 REAL
SP1Percent REAL
SP2Percent
SP1HAlarm BOOL
SP2HAlarm BOOL
SP1LAlarm BOOL
SP2LAlarm BOOL
PV1Percent REAL
PV2Percent REAL
E1 REAL
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Description
CV3 rate of change alarm indicator. TRUE when the
calculated rate of change for CV3 exceeds
CV3ROCPosLimit.
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 1 value. The value of SP1 is used to
control CV when in the Auto or the PV1 Tracking
mode, scaled in PV1 units.
Current setpoint 2 value. The value of SP2 is used to
control CV when in the Auto or the PV2 Tracking
mode, scaled in PV2 units.
The value of SP1 expressed in percent of span of
PV1.
SP1Percent = ((SP1 − PV1EUMin ) * 100) /
PV1Span
where PV1Span = PV1EUMax – PV1EUMin
The value of SP2 expressed in percent of span of
PV2.
SP2Percent = ((SP2 − PV2EUMin ) * 100) /
PV2Span
where PV2Span = PV2EUMax – PV1EUMin
SP1 high alarm indicator. TRUE when the SP1 >=
SP1HLimit.
SP2 high alarm indicator. TRUE when the SP2 >=
SP2HLimit.
SP1 low alarm indicator. TRUE when the SP1 <=
SP1LLimit.
SP2 low alarm indicator. TRUE when the SP2 <=
SP2LLimit.
PV1 expressed in percent of span.
PV1Percent = (( PV1 − PV1EUMin ) * 100) /
PV1Span
PV1 Span calculation: PV1Span =
( PV1EUMax - PV1EUMin )
PV2 expressed in percent of span.
PV2Percent = (( PV2 − PV2EUMin ) * 100) /
PV2Span
PV2 Span calculation: PV2Span =
( PV2EUMax − PV2EUMin )
Process1 error. Difference between SP1 and PV1,
scaled in PV1 units.
Chapter 1
Values
225