Owner manual

34
Functions
10.1.2. CUTOFF -
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
Table 17: DIP-switch 2
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 %
Figure 13: CUTOFF graph
8) Factory settings can be changed via communications software.
english
Type 8791