Technical data

8.15.2 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, 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:

Revolution

Resolution (variable)

SSIREVOL

Bit

1514131211109876543210

14131211109876543210

131211109876543210

1211109876543210

11109876543210

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)

86 S300 Instructions Manual

Electrical installation 09/2011 Kollmorgen

S300