Allen-Bradley LOGIX 5000 User Manual

Process Control Instructions
Chapter 1
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018 193
Factor REAL Non-integrating model approximation
factor. Only used for integrating process
types.
Default = 100
AtuneStart BOOL Start Autotune request. Set True to initiate
auto tuning of the function block. Ignored
when IMC is not in Manual mode. The
function block will reset this parameter to
FALSE.
Default = FALSE
AtuneUseModel BOOL Use Autotune model request. Set True to
replace the current model parameters with
the calculated Autotune model
parameters. The function block sets the
input parameter to FALSE.
Default = FALSE
AtuneAbort BOOL Abort Autotune request. Set True to abort
the auto tuning of the IMC function block.
The function block sets input parameter to
FALSE.
Default = FALSE
Output
Parameters
Data Type Description Valid and
Default Values
EnableOut BOOL Indicates if instruction is enabled. Cleared
to false if CVEU overflows.
CVEU REAL Scaled control variable output. Scaled by
using CVEUMax and CVEUMin, where
CVEUMax corresponds to 100% and
CVEUMin corresponds to 0%. This output is
typically used to control an analog output
module or a secondary loop.
CVEU = (CV * CVEUSpan / 100) + CVEUMin
CVEU span calculation: CVEUSpan = (
CVEUMax − CVEUMin )
CV REAL Control variable output. This value will
always be expressed as 0…100%. CV is
limited by CVHLimit and CVLLimit when in
Auto or CascadeRatio mode or Manual
mode if CVManLimiting is TRUE; otherwise
limited by 0 and 100%.
DeltaCV REAL Difference between the Current CV and the
previous CV (Current CV - previous CV).
CVInitializing BOOL Initialization mode indicator. Set TRUE
when CVInitReq or function block FirstScan
are TRUE, or on a TRUE to FALSE transition
of CVFault (bad to good). CVInitializing is
set FALSE after the function block has been
initialized and CVInitReq is no longer TRUE.
CVHAlarm BOOL CV high alarm indicator. TRUE when the
calculated value for CV > 100 or CVHLimit.
CVLAlarm BOOL CV low alarm indicator. TRUE when the
calculated value for CV < 0 or CVLLimit.
CVROCPosAlarm BOOL CV rate of change alarm indicator. TRUE
when the calculated rate of change for CV
exceeds CVROCPosLimit.

Allen-Bradley LOGIX 5000 Specifications

General

Brand	Allen-Bradley
Model	LOGIX 5000
Category	Controller
Language	English