Fig. 28: Tight closing
Lower value
The ‘Lower value’ parameter defines the lower value of the tight closing. If the setpoint position falls
below this value, the valve is moved to the lower end position with maximum drive force.
Value range Description
0.0 … 45.0% Permissible setting range, factory setting: 2.0%
Tab. 32: Lower value
Upper value
The ‘Upper value’ parameter defines the upper value of the tight closing. If the setpoint position
exceeds this value, the valve is moved to the upper end position with maximum drive force.
Value range Description
55.0 … 100.0% Permissible setting range, factory setting: 98.0%
Tab. 33: Upper value
‘Stroke limitation’ menu
The stroke limiter permits restriction of the operating range of the positioner. This is independent of
the characteristics of the setpoint characteristic curve (linear, equal percentage, user-defined). The
setpoint characteristic curve is adjusted in accordance with the values for the lower and upper stroke
limitation.
Mode
The ‘Mode’ parameter defines the stroke limitation mode. Stroke limitation can be activated at one or
both end positions.
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