Samson 3730 Series Mounting And Operating Instructions page 191

Code Parameter – Readings/
no.
values [default setting]
9* Travel/angle range end
(upper x-range value)
20.0 to [100.0 %] of the
nominal range, ESC
Specified in mm or angle °
provided Code 4 is acti-
vated.
10* Travel/angle lower limit
(lower x-limit)
0.0 to 49.9 % of the oper-
ating range, [No], ESC
11* Travel/angle upper limit
(upper x-limit)
50.0 to 120.0 %,
[100.0 %] of the operating
range, No, ESC
12* w-start
[0.0] to 75.0 % of the set
point range, ESC
EB 8384-3 EN
Description
Upper range value for travel/angle in nominal or operating range
The value is displayed or must be entered.
The characteristic is adapted.
Example: The operating range is modified, for example to limit the
range of a control valve which has been sized too large. For this
function, the entire resolution range of the set point is converted to
the new limits.
0 % on the display corresponds to the adjusted lower limit and 100
% to the adjusted upper limit.
Limits travel/opening angle to the entered value (lower limit). The
characteristic is not adapted.
The characteristic is not adapted to the reduced range. See also the
example in Code 11.
Limits travel/angle to the entered value (upper limit). The character-
istic is not adapted.
Example: In some applications, it is better to limit the valve travel,
e.g. if a certain minimum medium flow is required or a maximum
flow must not be reached.
The lower limit must be adjusted with Code 10 and the upper limit
with Code 11.
If a tight-closing function has been set up, it has priority over the
travel limitation.
When set to No, the valve can be opened past the rated travel with
a set point outside of the 0 to 100 % range.
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).
16-3