Samson 3730 Series Mounting And Operating Instructions page 76

Code list
12* w-start
0.0 to 75.0 [0.0] % of the
reference variable range
ESC
13* w-end
25.0 to 100.0 [100.0] % of
the reference variable range
ESC
Final position w <
14*
0.0 to [1.0] %
of the span adjusted via
Code 12/13
OFF
ESC
Final position w >
15*
[OFF]
50.0 to 100.0 %
of the span adjusted via
Code 12/13
ESC
Pressure limit
16*
[OFF]
1.4 2.4 3.7 bar
ESC
76
EB 8384-3 EN
Lower range value of the applicable reference variable range
must be smaller than the final value w-end, 0 % = 4 mA
The reference variable range is the difference between w-end
and w-start, and must be Δw ≥ 25 % = 4 mA.
For an adjusted reference variable range of 0 to 100 % = 4 to
20 mA, the control valve must move through its entire operating
range from 0 to 100 % travel/angle of rotation.
In split-range operation, the valves operate with smaller refer-
ence variables. The control signal of the control unit to control
two valves is divided such, for instance, that the valves move
through their full travel/angle of rotation at only half the input
signal (first valve set to 0 to 50 % = 4 to 12 mA and second valve
set to 50 to 100 % =12 to 20 mA reference variable).
Upper range value of the applicable reference variable range,
must be greater than w-start.
100 % = 20 mA
If w approaches the percentage adjusted towards 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.
If w approaches the percentage adjusted towards the final value
that causes the valve to open, the actuator is immediately com-
pletely 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.
Example: Set the final position w > to 99 % for three-way valves.
The signal pressure can adopt the value of the applied supply
pressure at the maximum [ OFF ] or it can be limited in stages of
1.4, 2.4 or 3.7 bar. This pressure limitation is already effective
during the initialization.
Note: After changing a pressure limit already set, the actuator
must be vented once (e.g. by selecting the fail-safe position over
Code 0).
The pressure limit of double-acting actuators must always be set
to OFF after initialization is completed.