Samson Series 3730 Mounting And Operating Instructions page 79

Parameter – Readings,
Code
no. values [default setting]
Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration.
15* Reference variable range
end (w-end)
50.0 to 100.0 %
of the span adjusted via
Code 12/13
[No], ESC
16* Pressure limit
[No]
1.4 2.4 3.7 bar
ESC
17* Proportional-action
coefficient KP (step)
0 to 17 [7]
ESC
Rate time TV (step)
18*
1 [2] 3 4 No
ESC
If w approaches the percentage adjusted at the final value that
causes the valve to open, the actuator is immediately completely
filled with air (with AIR TO OPEN) or vented (with AIR TO
CLOSE). This action always lead 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 final position w > 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).
NOTICE
Do not activate the pressure limit for double-acting actuators with
valve closed position AIR TO OPEN (AtO).
Displaying or changing K
Note on changing the K
During the initialization of the positioner, the K
optimized.
Should the positioner show a tendency for impermissibly high
post-pulse oscillation due to additional interference, the K
T steps can be adapted after the initialization.
V
For this, either the T
V
the desired response behavior is reached or, when the maximum
value of 4 is reached, the K
ments.
NOTICE
Changing the K step influences the system deviation.
P
Displaying or changing T
see note under K step
P
A change of the T step has no effect on the system deviation.
V
Description
P
and T steps:
P V
step can be increased in increments until
step can be decreased in incre-
P
,
V
Code list
and T values are
P V
and
P
79
EB 8384-2 EN