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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 185 / 240
Phone +49 721 4846-0, Fax +49 721 4846-1019, Email
Parameters
Settings of the E-727
Parameters reflect the properties of the E-727 and the connected stage and define the behavior of
the system (e.g. settings for the control algorithm (p. 35) and notch filters (p. 37)).
The parameters can be divided into the following categories:
Protected parameters whose default settings cannot be changed
Parameters that can be set by the user to adapt to the application
The write permission for the parameters is determined by command levels.
Every parameter is present in the volatile as well as in the nonvolatile memory of the E-727. The
values in the nonvolatile memory are loaded to the volatile memory as default values when
switching on or rebooting the E-727. The values in the volatile memory determine the current
behavior of the system.
The values of some parameters are stored on the ID chip of the stage. They are loaded to the
volatile and nonvolatile memory when the E-727 is switched on or rebooted. You cannot overwrite
the parameters in the ID-chip (this can only be done by PI). See "ID-Chip Support / Stage
Replacement" (p. 131) for more information.
Parameter Handling
NOTICE
Improper parameter settings!
Incorrect parameter values may lead to improper operation or damage to your hardware.
Save the current parameter values of the E-727 to the PC (p. 53) before you make changes in
the nonvolatile memory.
It is recommended that any modifications be first made in the volatile memory, and when the
E-727 runs well, saved to the nonvolatile memory.
Do not change the current interface settings of the E-727 in the volatile memory—except of
the baud rate—because it will not be possible to maintain communication afterwards.
INFORMATION
While parameter values are being read from or written to the nonvolatile memory of the E-727,
the servo mode is temporarily switched off. This may lead to faulty control or large position
errors.
Observe the following when you use the commands SEP, SEP?, RPA, WPA, or the
corresponding operating elements in the PC software:
- Avoid motions of the axes.
- Do not carry out measurements with the axes.