Samson TROVIS 3730-3, Mounting And Operating Instructions

Page: 129 / 180

EB 8384-3 EN 129
Appendix
Code
no.
Parameter – Readings/
values [default setting]
Description
12* w-start
[0.0] to 75.0 % of the set
point range, ESC
The lower set point range value must be lower than upper range val-
ue (w-end), 0 % = 4 mA.
The set point range is the difference between w-end and w-start and
must be Δw ≥ 25 % = 4 mA.
When the set point range of 0 to 100 % = 4 to 20 mA, the valve
must move through its entire operating range from 0 to 100 % trav -
el/angle of rotation.
In split-range operation, the valves operate with smaller set points.
The control signal of the control unit to control two valves is divided
such, for instance, that the valves move through their full travel/an -
gle 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).
13* w-end
25.0 to [100.0 %] of the
set point range, ESC
The upper range value of the set point range must be greater than
lower range value (w-start).
100.0 % = 20 mA
14* Set point cutoff decrease
0.0 to 49.9 %, [1.0 %] of
the span adjusted in
Code 12/13, No, ESC
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.
15* Set point cutoff increase
50.0 to 100.0 % of the
span adjusted in
Code 12/13, [No], ESC
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 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 cutoff to 99 % for three-way valves.