Samson TROVIS 3730-3, Монтаж и эксплуатация

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130 EB 8384-3 EN
Appendix
Code
no.
Parameter – Readings/
values [default setting]
Description
16* Pressure limit
1.4 bar, 2.4 bar, 3.7 bar,
[No], ESC
The signal pressure to the actuator can be limited in stages.
After changing a pressure limit already set, the actuator must be
vented once (e.g. by selecting the fail-safe position (SAFE) over
Code 0).
Do not activate pressure limitation for double-acting actuators
(with fail-safe position AIR TO OPEN).
17* Proportional-action coeffi -
cient K
P
(level)
0 to 17, [7], ESC
Read or change K
P
Note concerning changing the K
P
and T
V
levels: During positioner
initialization, the values for K
P
and T
V
are optimally set. If the posi-
tioner tends to overshoot impermissibly due to other disturbances,
the K
P
and T
V
levels can be adapted accordingly after initialization.
Increment T
V
level until desired behavior is reached or when the
maximum value of 4 is reached, the K
P
level can be decreased in in-
crements.
K
P
level changes affect the set point deviation.
18* Derivative-action time T
V
(level)
1, [2], 3, 4, No, ESC
Read or change T
V
(see K
P
level)
A change of the T
V
level has no effect on the system deviation.
19* Tolerance band
0.1 to 10.0 %, [5.0 %] of
the operating range, ESC
Used for error monitoring.
Determination of the tolerance band in relation to the operating
range.
Associated lag time (30 s) is a reset criterion.
If a transit time is determined during initialization which is six times
longer than 30 s, the six-fold transit time is accepted as the lag time.
20* Characteristic
[0] to 9, ESC
Select characteristic
0 Linear
1 Equal percentage
2 Reverse equal percentage
3 SAMSON butterfly valve, linear
4 SAMSON butterfly valve, equal percentage
5 VETEC rotary plug valve, linear
6 VETEC rotary plug valve, equal percentage
7 Segmented ball valve, linear
8 Segmented ball valve, equal percentage
9 User-defined (defined over operator software)
The various characteristics are listed in the Appendix.