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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 168 / 240
Phone +49 721 4846-0, Fax +49 721 4846-1019, Email
INFORMATION
If you want to use the TCP/IP interface of the E-727 in a network with DHCP server when the
EtherCAT communication does not run, the following is recommended:
Connect the network cable for TCP/IP communication while the EtherCAT communication is
still running or even before you switch on the E-727.
Controlling the Axes
Necessary Adjustments
NOTICE
Damage to the stage and the load from oscillations!
Unsuitable settings of the notch filter and the servo-control parameters of the E-727 can cause
the stage to oscillate. Oscillations can damage the stage and/or the load affixed to it.
Only control the E-727 via EtherCAT master after you have optimized the settings of the notch
filter and the servo-control parameters of the E-727; see „Adjusting the Notch Filter(s) in
Open-Loop Operation“ (p. 136) and "Checking and Optimizing the Servo-Control Parameters"
(p. 140). Optimization must be done via the TCP/IP or USB interface.
Cycle Time
During control via EtherCAT master, the minimum cycle time for specifying data for the E-727
(2 ms) must be observed. If the actual cycle time is shorter than the minimum cycle time of the E-
727, the axes do not move, and an error occurs.
Object Dictionary
The object dictionary is a list of variables and parameters of the device to be controlled, in this case
an axis of the E-727. For details, see the appendix (p. 236). Each entry is addressed via an index of
its own and possibly via a sub-index. The entire index space is subdivided into several ranges.
The object range 0x6000 to 0x67FF is dedicated to the CiA402 drive profile. For multi-axis devices
like the E-727, the object range 0x6000 to 0x67FF is shifted by 0x800 per axis as described in the
IEC 61800-7-201. This way, each axis has its own objects in this object range.
See „Homing Mode“ (p. 173), „Profile Position Mode“ (p. 174) and „Cyclic Synchronous Position
Mode“ (p. 177) for the CiA402-specific objects supported in the individual modes of operation.