bürkert 8635 Betriebsanleitung Seite 118

X.TUNE
Autotune for positioner
Start the automatic adaptation of the positioner to the current operating conditions (X.TUNE):
The following functions are initiated automatically:
• Adaptation of the sensor signal to the (physical) stroke of the valve used
• Determination of parameters for driving the integral piezoelectric positioning system
• Setting of the controller parameters of the positioner. Optimization is done according to the criteria: as short a correcting
time as possible and freedom from overshoot.
Switch on the voltage supply
Depress the MANUAL/AUTOMATIC key
Press the ARROW key
Depress the MANUAL/AUTOMATIC key
Display
:
¦
¦
¦
¦
:
Press briefly the MANUAL/AUTOMATIC key
Press the arrow key
Press briefly the MANUAL/AUTOMATIC key
Note: On commissioning the positioner, execution of "
optimum settings for the valve used and the current operating conditions.
The function "X.TUNE" should be executed with the valve unpressurized or shut off, since otherwise pressure variations in
the valve may cause faulty adaptation of the controller. The supply pressure (pneumatic auxiliary energy) should be set to
the value that will exist in later operation!
ATTENTION!
Type 8635 S/HART
for 5 secondes
for 5 seconds
Descritption
Countdown from 5 to 0 to start of
Autotune
Display of the autotune phase in progress at
the moment
(the continuation is indicated by rotating bars
to the left of the display)
Flashing display => End of Autotune
Message on occurrence of an error
(to right of display: error number)
During execution of the autotune function, the valve moves autonomously from its momentary
position. For this reason, never execute an autotune when a process is running!
O
Switch to configuration level
Scrollen zum Menüpunkt
Start of
Store operating conditions
Scroll to menu item
Jump to mode AUTOMATIC or MANUAL
" is absolutely necessary. It allows the positioner to determine the
P
PERATING THE OSITIONER
OP 5