Fisher FIELDVUE DVC6200 Instruction Manual page 53

Instruction Manual
D103409X012
Table 4‐3. Gain Values for Preselected Travel Tuning Sets
Tuning Set Proportional Gain
C
D
E
F
G
H
I
J 11.3
K 13.1
L 15.5
M 18.0
X (Expert) User Adjusted
In addition, you can specify Expert tuning and individually set the proportional gain, velocity gain, and minor loop
feedback gain. Individually setting or changing any tuning parameter or running the Performance Tuner or
Stabilize/Optimize will automatically change the tuning set to X (expert).
Note
Use Expert tuning only if standard tuning has not achieved the desired results.
Stabilize/Optimize or Performance Tuner may be used to achieve the desired results more rapidly than Expert tuning.
Table 4‐4 provides tuning set selection guidelines for Fisher and Baumann actuators. These tuning sets are only
recommended starting points. After you finish setting up and calibrating the instrument, you may have to select either
a higher or lower tuning set to get the desired response. You can use the Performance Tuner to optimize tuning.
D Integral Enable—Yes or No. Enable the integral setting to improve static performance by correcting for error that
exists between the travel target and actual travel. Travel Integral Control is enabled by default.
D Integral Gain—Travel Integral Gain is the ratio of the change in output to the change in input, based on the control
action in which the output is proportional to the time integral of the input.
D Stabilize/Optimize—Stabilize/Optimize permits you to adjust valve response by changing the digital valve controller
tuning. During this routine, the instrument must be out of service; however, the instrument will respond to setpoint
changes.
If the valve is unstable, select Decrease Response to stabilize valve operation. This selects the next lower tuning set
(e.g., F to E). If the valve response is sluggish, select Increase Response to make the valve more responsive. This selects
the next higher tuning set (e.g., F to G).
If after selecting Decrease Response or Increase Response the valve travel overshoot is excessive, select Decrease
Damping to select a damping value that allows more overshoot. Select Increase Damping to select a damping value that
will decrease the overshoot. When finished, select done.
Velocity Gain
4.4 3.0
4.8 3.0
5.5 3.0
6.2 3.1
7.2 3.6
8.4 4.2
9.7 4.85
5.65
6.0
6.0
6.0
User Adjusted
Minor Loop Feedback Gain
35
35
35
35
34
31
27
23
18
12
12
User Adjusted
Detailed Setup
May 2013
53