33
Start-up
Type 3281
8.5.7
X.LIMIT - Limitation of the mechanical valve adjustment range
This function limits the (physical) control range to predetermined % values (bottom and top). The valve
adjustment range of the limited adjustment range is set equal to 100%. If the limited valve control range is left
during operation, negative actual positions or actual positions greater than 100% are displayed.
Factory setting: Limit bottom setting range = 0%, limit top setting range t = 100%
Setting ranges:
Limit bottom setting range:
0...20% of the total setting range
limit top setting range: 80...100% of the total setting range
Limited setting
range
Unlimited setting
range
Physical setting
range (%)
Limited
setting range
(%)
Set-point value [mA](
INPUT
)
Fig. 15: Diagram X.LIMIT
8.5.8
CUTOFF
CUTOFF_min - Sealing function for positioners/process controllers
This function ensures that the valve is tightly closed outside the control range Enter limits here for the set-
point position (CMD) or process set-point value from which the actuator is completely closed.
CUTOFF_max - Opening function for positioners/process controllers
This function ensures that the valve opens 100% outside the control range Enter limits for the set-point
position (CMD) or process set-point value from which the actuator opens completely.
english
