56
Operation and function
14.1.2
CUTOFF
-
Sealing function for the positioner
This function causes the valve to be sealed outside the control range.
Control mode resumes at a hysteresis of 1%.
Factory setting: OFF (no sealing function)
Position
Function
ON
Sealing function active. The valve completely closes below 2 %
24)
and opens
above 98 % of the set-point value (
CUTOFF
)
OFF
No sealing function
Table 28:
Sealing function
The communications software can be used to change the limits for the position set-point value as a
percentage.
Activation in the device has priority over the communications software, i.e. settings of the sealing
function (
CUTOFF
) which are modified via the communications software are only active if cutoff
LED in the positioner lights up yellow.
Valve stroke [%]
Adjustable from 75 – 100 %
Set-point
value [%]
Adjustable from 0 – 25 %
Figure 33:
CUTOFF graph
24) Factory setting can be changed via communications software.
english
Type 8696, REV.2
Summary of Contents for 8696
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