Samson 3730 Series Mounting And Operating Instructions page 192

Code Parameter – Readings/
no.
values [default setting]
13* w-end
25.0 to [100.0 %] of the
set point range, ESC
14* Set point cutoff decrease
0.0 to 49.9 %, [1.0 %] of
the span adjusted in
Code 12/13, No, ESC
15* Set point cutoff increase
50.0 to 100.0 % of the
span adjusted in
Code 12/13, [No], ESC
16* Pressure limit
1.4 bar, 2.4 bar, 3.7 bar,
[No], ESC
17* Proportional-action coeffi-
cient K (level)
P
0 to 17, [7], ESC
18* Derivative-action time T
(level)
1, [2], 3, 4, No, ESC
16-4
Description
The upper range value of the set point range must be greater than
lower range value (w-start).
100.0 % = 20 mA
If the set point w reaches up to the entered percentage at the final
value that causes the valve to close, the actuator is immediately com-
pletely vented (with AIR TO OPEN) or filled with air (with AIR TO
CLOSE). This action always lead to maximum tight-closing of the
valve.
Codes 14/15 have priority over Codes 8/9/10/11.
Codes 21/22 have priority over Codes 14/15.
If the set point w reaches up to the entered percentage at the final
value that causes the valve to open, the actuator is immediately filled
with air (with AIR TO OPEN) or completely vented (with AIR TO
CLOSE). This action always leads to the valve being completely
opened.
Codes 14/15 have priority over Codes 8/9/10/11.
Codes 21/22 have priority over Codes 14/15.
Example: set the cutoff to 99 % for three-way valves.
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).
Read or change K
Note concerning changing the K
initialization, the values for K
tioner tends to overshoot impermissibly due to other disturbances,
the K and T levels can be adapted accordingly after initialization.
P V
Increment T level until desired behavior is reached or when the
V
maximum value of 4 is reached, the K
crements.
K level changes affect the set point deviation.
P
Read or change T
V
A change of the T
P
and T
P
and T are optimally set. If the posi-
P V
P
(see K level)
V P
level has no effect on the system deviation.
V
levels: During positioner
V
level can be decreased in in-
EB 8384-3 EN