User`s guide

Section 1 — An Operator’s Quick Tour of Profit Optimizer Displays
1.2 Control Concepts You Need to Understand
1/00 Profit Optimizer User's Guide 3
Honeywell Inc.
CV, MV, and DV
BVD, CC
Statuses
The status of a variable indicates its operating state or condition, what the controller
is doing with it. The status is a window into the controller to see how the controller
is using the variable, or what confidence the controller has in the variable as a
control value.
On the Summary screens, status displays in the [STAT] field
On the Detail screens, status displays in the [STATUS] field.
What the
Statuses Mean
Table 1-2 describes the 12 statuses that indicate how the controller is using a
variable.
Table 1-2 CV, MV, BVD and CC Statuses
This
Can Display for
Status CV MV DV BDV CC What the Status Means
INIT
✓✓ ✓✓
Variable is initializing.
ON
✓
MV is available to the controller.
INAC
✓✓✓✓
Interface point is set INACTIVE.
GOOD
✓✓✓✓
Controller is receiving a good signal.
DROP
✓✓✓✓
Controller is not using the variable in the
control solution.
FFWD
✓
MV is being used as a feedforward value.
LOW
✓
MV is clamped low or is at its low limit.
HIGH
✓
MV is clamped high or is at its high limit.
SERV
✓
Communication with the process is lost. The
non critical MV is ignored.
CRIT
✓✓✓✓
Critical value is bad.
PRED
✓
✓✓
Controller is using the predicted CV value
instead of a true measurement. Either the
measured value is bad, or the value is an
analyzer-type value.
WDUP
✓
✓
Nothing the controller can do. All effective
MVs are currently under constraints.
-c
✓✓
The suffix -c indicates a critical CV or DV .
Shown only on the CV and DV summary
displays.