Beckhoff AX8911, Документация

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System description
AX8911 9 Version: 1.2.0
3 System description
3.1 The AX8000 multi-axis servo system
Multi-channel drive solutions can be constructed with the AX8000 multi-axis servo system. The required
number of single-channel or two-channel axis modules are attached to the central supply module. The
modules are connected without screws or tools using the built-in AX-Bridge quick connection system, which
is based on spring-loaded terminals. The single-axis and dual-axis modules can optionally be equipped with
STO or Safe Motion (AX8xxx-x1xx or AX8xxx-x2xx).
eXtreme Fast Control in the drive
The EtherCAT-based AX8000 multi-axis servo system combines powerful FPGA technology with multi-core
ARM processors. The new multi-channel current control technology makes extremely short sampling and
reaction times possible. The entirely hardware-implemented current controller combines the advantages of
analog and digital control technology: reaction to a deviation of the current from the setpoint value is possible
within 1 µs; the velocity controller cycle time is around 16 µs at a switching frequency of 32 kHz. The
processing of the EtherCAT process data (actual and setpoint values) can take place without a processor
almost without delay in the hardware, so that the minimum EtherCAT cycle time is only 62.5 µs.
One Cable Technology (OCT)
The AX8000 multi-axis servo system supports OCT, the one-cable solution for power and feedback. In
connection with the servo motors from the AM8000 (standard), AM8500 (increased inertia) and AM8800
(stainless steel) series, the wiring is reduced to the obligatory motor cable, via which the feedback signals
are then also directly transmitted. As in sensorless control, the user no longer has to use an additional
feedback cable. All the information required for control purposes is transferred reliably and fail-safe via a
digital interface.