8.13.2
SSI encoder output (X5)
The SSI interface (synchronous serial absolute-encoder emulation) is part of the standard
package. Select encoder function SSI (“Encoder Emulation” screen page). The servo
amplifier calculates the motor shaft position from the cyclic-absolute signals of the
resolver or encoder. From this information a SSI date (Stegmann patent specification DE
3445617C2) is provided. Max 32 bits are transferred. The leading data bit contains the
number of revolutions and are selectable from 12 to 16 bits. The following max. 16 bits
contain the resolution and are not variable.
The following table shows the allocation of the SSI date depending upon selected number
of revolutions:
Revolution
Resolution (variable)
SSIREVOL
Bi
t
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
13 12 11 10 9 8 7 6 5 4 3 2 1 0
12 11 10 9 8 7 6 5 4 3 2 1 0
11 10 9 8 7 6 5 4 3 2 1 0
The signal sequence can be output in
Gray
code or in
Binary
(standard) code.
The servo amplifier can be adjusted to the clock frequency of your SSI-evaluation with the
setup software (cycle time 1,3 µs or 10 µs).
The drivers operate off an internal supply voltage.
Connection and signals for the SSI interface :
Default count direction: UP when the motor shaft is rotating clockwise (looking at the end
of the motor shaft)
SERVOSTAR
®
300 Product Manual
71
Danaher Motion
10/2007
Electrical installation
SERVOSTAR
