PI E-727 - Page 135

User Manual
E727T0005, valid for E-727
BRO, 2019-06-28
Physik Instrumente (PI) GmbH & Co. KG, Auf der Roemerstrasse 1, 76228 Karlsruhe, Germany Page 135 / 240
Phone +49 721 4846-0, Fax +49 721 4846-1019, Email info@pi.ws, www.pi.ws
 The settling behavior of the axis in closed-loop operation is influenced by the notch
filter settings. Set the notch filters before you optimize the servo-control parameters
(p. 136).
 If you work with the Piezo Dynamic Tuner window of PIMikroMove:
− If you change a parameter value of the E-727 by entering a corresponding value:
The value is displayed in a blue font until you press Enter on your keyboard.
Pressing Enter sends the value to the E-727 and changes the font color from blue
to black. For fields highlighted by a red background, the parameter values in
volatile and nonvolatile memory of the E-727 differ.
− When the Notch Frequency 1 value is set in the Parameter Settings panel of the
Piezo Dynamic Tuner window, the Servo-Loop I-Term value can be adjusted
automatically in accordance. The adjustment depends on the selection in the
Automatic I-Term calculation drop down menu.
Default: The I-term is set to a “conservative” value which is calculated with the
following formula:
Further options:
“Dynamic” I-term value, calculated with the following formula:
“Off”, i.e. no automatic I-term calculation.
 The settings for slew rate (Slew Rate / Velocity field) and record table rate (Record
Rate field) can be changed in the Piezo Dynamic Tuner window. Entering new values in
these fields changes the values of the corresponding parameters in volatile memory:
− Servo Loop Slew-Rate (ID 0x07000200) or Open Loop Slew-Rate (ID 0x07000201),
depending on the current operating mode (open-loop or closed-loop operation)
− Data Recorder Table Rate (ID 0x16000000).
The values are not saved or reset when you use the Save … and Reset … buttons in the
Parameter Settings panel of the Piezo Dynamic Tuner window.