Samson Series 3730 Mounting And Operating Instructions page 78

Code list
Parameter – Readings,
Code
no. values [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
w-start
12*
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
Reference variable range
14*
start (w-start)
0.0 to 49.9 [1.0] %
of the span adjusted via
Code 12/13
No, ESC
78
EB 8384-2 EN
Limitation of the travel/angle of rotation upwards to the entered
value, 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!
When set to No, the valve can be opened past the nominal travel
with a reference variable outside of the 0 to 100 % range.
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 Dw ³ 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 at the final value that
causes the valve to close, the actuator is immediately completely
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.
Description