Automatic Adjustment (Autotune) Of The Position Controller - Burkert 8692 Operating Instructions Manual

2.4.4 Automatic adjustment (autotune) of the position controller

X.TUNE - Autotune for position controller
WARNING!
While the X.TUNE function is running, the valve automatically moves from its current position!
• Never run X.TUNE while a process is running!
• Take appropriate measures to prevent the equipment from being accidentally actuated!
CAUTION!
Avoid maladjustment of the controller due to an incorrect supply pressure or applied operating medium pressure!
• Run X.TUNE whenever the supply pressure (= pneumatic auxiliary energy) is available during subsequent operation.
• Run the X.TUNE function preferably without operating medium pressure to exclude interference caused by flow forces.
The following functions are actuated automatically:
• Adjustment of the sensor signal to the (physical) stroke of the actuator used
• Determination of parameters for the PWM signals to control the solenoid valves integrated in the positioner
• Adjustment of the controller parameters for the position controller. Optimisation occurs according to the criteria of a short-
est possible correction time with a simultaneous freedom from overshoot.
→
You start Autotune by selecting
→
Then hold down the right selection key (RUN) for approx. 3 seconds (countdown on display).
When the automatic adjustment completes, the message "X.TUNE READY" * is indicated.
→
Press any key to return to the main menu.
To stop X.TUNE, press the left or right selection key (STOP).
Sequence for automatic adjustment of the position controller to the particular operating conditions
Display
X.TUNE
started
TUNE #0
Init
TUNE #1
Max-Pos
TUNE #2
Min-Pos
:
X.TUN
Eready
or
TUNE
err/break
* If a fault occurs: "TUNE err/break"
58
X.TUNE in the main menu (MAIN) using the arrow keys.
Description
Start of X.TUNE
Display of the X.TUNE phase which is currently running
(progress is indicated by a progress bar along the upper edge of the display).
Display at the end of X.TUNE
Display when a fault occurs
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Type 8692, 8693
Start-up, operation
position controller Type 8692