Burkert Type 8635 - Manual (Page 34)

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