Digital Servo Amplifier SERVOSTAR 400 - BIBUS SK, sro

Interfaces 07/03 Kollmorgen
3.6.2 SSI interface (X4)
The SSI interface (synchronous serial absolute-encoder emulation) is part of the package delivered.
Select the encoder function SSI (screen page Encoder).
In the servo amplifier, the position of the motor shaft is calculated from the cyclic-absolute signals of
the resolver or encoder. The information is used to generate a position output compatible with the
data format of normal commercial SSI absolute encoders. This synchronous-serial, cyclic-absolute
12-bit information is output on the SubD-Connector X4.
24 bits are transmitted. The upper 12 bits are fixed at ZERO, the lower 12 bits contain the position
information.
The interface must be read in as a multi-turn encoder, but delivers valid single-turn data. The signal
sequence can be output in Gray code (standard) or in binary code (parameter SSI-CODE).
A serial signal is read out from the control, with a synchronous clock frequency of max. 1.5 MHz.
The servo amplifier can be adjusted to the clock frequency of your SSI-evaluation with the
SSI-CLOCK parameter (200 kHz or 1.5MHz and inverted).
The ground reference for the interface is AGND.
This must always be connected to the ground for the control input signals.
Connections and signal description for the SSI interface :
The count direction for the SSI interface is upwards when the motor shaft is rotating clockwise (looking
at the shaft end).
SERVOSTAR 400
46 SERVOSTAR ® 400 Installation manual