34
Functions
CUTOFF
10.1.2.
-
sealing function for the position controller
This function causes the valve to be sealed outside the control range.
Controlled operation is resumed with a hysteresis of 1 %.
Factory settings: DIP switch 2 set to OFF (no sealing function)
DiP switches Position
Function
2
ON
Sealing function active. The valve completely closes below 2 %
8)
and opens above 98 % of the set-point value (
CUTOFF
)
OFF
No sealing function
DIP-switch 2
Table 15:
The communications software can be used to change the limits for the position set-point value as a percentage.
The switching position of the DIP switches in the positioner has priority over the communications
software, i.e. settings of the sealing function (
CUTOFF
) which are changed via the communications
software are not active unless DIP switch 2 in the positioner is set to ON.
Valve stroke
[%]
Adjustable from 75 – 100 %
Set-point value [%]
Adjustable from 0 – 25 %
CUTOFF graph
Fig. 12:
8)
Factory settings can be changed via communications software.
english
Type 8791
Содержание 8791
Страница 184: ...184 accessoires Type 8791 français ...
Страница 185: ......
Страница 186: ...www burkert com ...