Samson 3730-6, Mounting And Operating Instructions

Page: 88 / 124

Code
no.
Parameter
– Readings,
values [default setting]
Description
Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration.
17* Proportional-action
coefficient Kp level
0 to 17 · ESC, [7]
NOTICE Changing the K
P
level influences the system
deviation. This influence can
be balanced out by tuning
the input filter in Code 6.
See section 7.6.6.
During the initialization of the positioner, the K
P
and T
V
values
are optimized. If the value for the K
P
level is below 3, the error
code 61 is activated.
Should the positioner show a tendency for impermissibly high
post-pulse oscillation due to additional interference, the K
P
and
T
V
levels can be adapted after the initialization.
For this, either the T
V
level can be increased in increments until
the desired response behavior is reached or, when the maximum
value of 4 is reached, the K
P
level can be decreased in incre-
ments.
18* Derivative-action time Tv
level
No · 1 to 4 · ESC, [2]
See Code 19.
A change of the T
V
level has no effect on the set point deviation.
19* Tolerance band
0.1 to 10.0 % of the
operating range · ESC, [5.0]
Used for error monitoring.
If the system deviation is greater than selected tolerance band for
a time longer than the lag time [30 s], this causes the error code
57 (control loop) to be activated.
Note: The lag time can only be set using the operator software.
20* Select characteristic
[0] to 9 · ESC
Select the characteristic. See section 16
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 in operator software)
88
EB 8384-6 EN
Code list