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Burkert Type 8635 User Manual

Page 34

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32 - 8635

S

YSTEM

D

ESCRIPTION

(PROFIBUS PA)

Characteristics of the positioner software

Supplementary function

Effect

Positioner with supplementary functions

AUTOTUNE

Automatic adaptation of positioner to the control valve

in use.

Tight-closing function

Valve closes tight outside the control range. A value is
specified (in %) from which the actuator is clompletely
exhausted (at 0 %) or pressurized (at 100 %).

Stroke limitation

Mech. valve piston movement only within a defined

stroke range.

Limitation of correction speed

Actuator takes a preset time to move from OPEN to
CLOSED or from CLOSED to OPEN.

Correction characteristic for
adaptation to the operating curve
(via PROFIBUS PA)

Linearization of the process curve can be carried out.

Insensitivity range

The positioner responds only above a control difference
to be specified.

Direction of action of the controller

setpoint

Reverse of direction of action of the setpoint

Direction of action of the actuator

Reverse of direction of action of the actuator

Safety position

Valve moves to a defined safety position

Factory reset

Reset to factory settings

Communication via PROFIBUS PA protocol