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Kollmorgen
10.2.3.3.2
SSI encoder output (X5)
SSI interface (synchronous serial absolute-encoder emulation). Select encoder function
SSI ("Encoder Emulation" screen page, ENCMODE 2). 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:
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.
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)
1
2
Clock
31
2
Binary
G31
Gray
Switch over time Data tv
Period T = 600 ns
Time Out tp = 3µs/13µs (SSITOUT)
S748-S772 Instructions Manual
Revolution
SSIREVOL
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
S748/772
RS 485
GND
RS 485
3
4
5
6
7
8
9
10 11
£
300nsec
11/2018
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
X5
6
7
1
GND
CLOCK
4
150 *
Ù
5
CLOCK
* according to line impedance
12 13
14
15 16
17 18 19 20
T
tv
Expansions
Resolution (variable)
Control
GND
21
22 23 24 25
26
27 28
29
³
I UI
Ä
2V/20mA
Output
³
I UI
Ä
0.3V
Input
RS 485
CLOCK
RS 485
30
31
32
33
tp
0
2
G0
147
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