Burkert Type 8693 - Manual (Page 85)

85
Start-up and operation of the
position controller Type 8692
20.5.4. automatic adjustment (autotune) of the position controller
X.TUNE - Autotune for position controller
WarninG!
Danger.due.to.the.valve.position.changing.when.the.X.TUNE.function.is.running!
When the
X.TUNE is running under operating pressure, there is an acute risk of injury.
• Never run X.TUNE while a process is running!
• Take appropriate measures to prevent the equipment from being accidentally actuated!
note!
Avoid.maladjustment.of.the.controller.due.to.an.incorrect.pilot.pressure.or.applied.operating.medium.
pressure!
• Run X.TUNE whenever the pilot 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 shortest possible correction time with a simultaneous freedom from overshoot.
Procedure:
→
You start Autotune by selecting X.TUNE in the main menu (MAIN) using the arrow keys.
→
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” 20) is indicated.
→
Press any key to return to the main menu.
To stop X.TUNE, press the left or right selection key (STOP).
20)
If a fault occurs: “TUNE err/break”
english
Type 8692, 8693