Emerson Fisher FIELDVUE DVC6000, Instruction Manual

Page: 67 / 162

Detailed Setup
September 2013 4-7
Performance Tuner
Note
The Performance Tuner is not
available for instrument level HC.
The Performance Tuner is used to optimize digital
valve controller tuning. It can be used with digital valve
controllers mounted on most sliding-stem and rotary
actuators, including Fisher and other manufacturers’
products. Moreover, because the performance tuner
can detect internal instabilities before they become
apparent in the travel response, it can generally
optimize tuning more effectively than manual tuning.
Typically, the performance tuner takes 3 to 5 minutes
to tune an instrument, although tuning instruments
mounted on larger actuators may take longer.
Integral Settings (1-2-2-1-2)
Integral Dead Zone—A window around the
Primary Setpoint in which integral action is disabled.
This feature is used to eliminate friction induced limit
cycles around the Primary Setpoint when the
integrator is active. The Dead Zone is configurable
from 0% to 2%, corresponding to a symmetric window
from 0% to +/
−
2% around the Primary Setpoint.
Default value is 0.25%.
Integral Limit—Provides an upper limit to the
integrator output. The high limit is configurable from 0
to 100% of the I/P drive signal.
Pressure Tuning (1-2-2-1-3)
WARNING
Changes to the tuning set may cause
the valve/actuator assembly to stroke.
To avoid personal injury and property
damage caused by moving parts,
keep hands, tools, and other objects
away from the valve/actuator
assembly.
Pressure Tuning Set—There are twelve Pressure
Tuning Sets to choose from. Each tuning set provides
a preselected value for the digital valve controller gain
settings. Tuning set B provides the fastest response.
Table 4-4. Gain Values for Preselected Pressure Tuning Sets
Tuning
Set
Pressure
Proportional Gain
Pressure
Integrator
Gain
Pressure
Minor Loop
Feedback Gain
B
C
D
E
F
G
0.5
2.2
2.4
2.8
3.1
3.6 0.3
0.1
0.1
0.1
0.1
0.1 35
35
35
35
35
34
H
I
J
K
L
M
4.2
4.
5.6
6.6
7.8
9.0
0.1
0.1
0.1
0.1
0.1
0.1 31
27
23
18
12
12
X
(Expert)
User Adjusted User Adjusted User Adjusted
Tuning set B is appropriate for controlling a pneumatic
positioner. Table 4-4 lists the proportional gain,
pressure integrator gain and minor loop feedback gain
values for preselected tuning sets.
In addition, you can specify Expert tuning and
individually set the pressure proportional gain,
pressure integrator gain, and pressure minor loop
feedback gain. Individually setting or changing any
tuning parameter will automatically change the tuning
set to X (expert).
Note
When selecting a tuning set for a
DVC6015, DVC6025 or DVC6035 remote
mount unit, it may be necessary to
reduce the tuning set, due to the
effects of the long tubing between the
digital valve controller and the
actuator.
Note
Use Expert tuning only if standard
tuning has not achieved the desired
results.
Stabilize/Optimize and performance
tuner may be used to achieve the
desired results more rapidly than
Expert tuning.
4