DVC6000f Series
March 2006
5-26
Tvl Velocity Gain
Travel Velocity Gain (SERVO_RATE [20]) is the
velocity gain for the travel control tuning set. Changing
this parameter will also change the tuning set to
Expert.
Tvl MLFB Gain
Travel MLFB Gain (TVL_MLFB_GAIN [44.5]) is the
minor loop feedback gain for the travel control tuning
set. Changing this parameter will also change the
tuning set to Expert.
Tvl Integ Enable
Select Yes or No. Travel Integral Enable
(TVL_INTEG_ENABLE [44.1]) is used to enable the
integral setting to improve static performance by
correcting for error that exists between the travel
target and actual travel.
Tvl Integral Gain
Travel Integral Gain (SERVO_RESET [19]) (also
called reset) 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.
Tvl Integ DeadZ
Travel Integral Dead Zone (TVL_INTEG_DEADZ
[44.4]) is a window around the Primary Setpoint in
which the integral action is disabled. The dead band is
configurable from 0 to 2%.
Tvl Integ Lim Hi
Travel Integral Limit Hi (TVL_INTEG_LIM_HI [44.2])
provides an upper limit to the integrator output. The
high limit is configurable from 0 to 100% of the I/P
drive signal.
Tvl Integ Lim Lo
The Travel Integral Limit Lo (TVL_INTEG_LIM_LO
[44.3]) provides a lower limit to the integrator output.
The low limit is configurable from −100 to 0% of the I/P
drive signal.
Table 5-10. Gain Values for Preselected Travel Tuning Sets
TUNING
SET
TRAVEL
PROPORTIONAL
GAIN
TRAVEL
VELOCITY
GAIN
TRAVEL
MINOR LOOP
FEEDBACK GAIN
B
C
D
E
F
G
2.0
4.4
4.8
5.5
6.2
7.2
3.0
3.0
3.0
3.0
3.1
3.6
35
35
35
35
35
34
H
I
J
K
L
M
8.4
9.7
11.3
13.1
15.5
18.0
4.2
4.8
5.6
6.0
6.0
6.0
31
27
23
18
12
12
X (Expert) User Adjusted User Adjusted User Adjusted
Pressure Tuning
(TB > Detailed Setup > Response Control > Pressure
Tuning)
WARNING
Changes to the tuning set may cause
the valve/actuator assembly to stroke.
To avoid personal injury and property
damage caused by the release of
pressure or process fluid, provide
some temporary means of control for
the process.
Press Tuning Set
There are twelve Pressure Tuning Sets
(PRESS_TUNING_SET [42.11]) to choose from. Each
tuning set provides a preselected value for the digital
valve controller gain settings.
Tuning set B provides the slowest response and M
provides the fastest response. Tuning set B is
appropriate for controlling a pneumatic positioner.
Table 5-11 lists the proportional gain, pressure
integrator gain and minor loop feedback gain values
for preselected tuning sets.
5
To Next Page
Loading...
Need help?
General
