Samson 3731-3 Mounting And Operating Instructions page 68

Code list
Parameter – Display, values
Code
no. [default setting]
Note: Codes with marked with an asterisk (*) must be enabled with Code 3 prior to configuration.
11* Travel/angle upper limit
(upper x-limit)
50.0 to 120.0 [100] % of
the operating range
No · ESC
Reference variable range
12*
start (w-start)
0.0 to 75.0 % of the
reference variable range
[0.0 %]
ESC
Reference variable range
13*
end (w-end)
25.0 to 100.0 % of the
reference variable range
[100.0 %]
ESC
68
EB 8387-3 EN
Description
Limitation of the travel/angle of rotation upwards to the entered
value.
When set to No, the valve can be opened past the nominal travel
with a reference variable outside of the 0 to 100 % range.
The characteristic 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.
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 ∆w ≥ 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 the 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