Product manual

8.12 Encoder emulation
8.12.1 Incremental encoder output - A quad B (X5)
The incremental-encoder interface is part of the standard package. Select encoder
function ROD (A Quad B) Encoder (“Encoder Emulation” screen page). The servo ampli
-
fier calculates the motor shaft position from the cyclic- absolute signals of the resolver or
encoder, generating incremental-encoder compatible pulses from this information. Pulse
outputs on the SubD connector X5 are 2 signals, A and B, with 90° phase difference (i.e.
in quadrature, hence the alternative term “A quad B” output), with a zero pulse.
The resolution (before multiplication) can be set by the RESOLUTION function:
Enc. function (ENCMODE) Feedback system Resolution (lines) Zero pulse (NI)
ROD (1)
Resolver 16 … 1024
once per turn
(only at A=B=1)
EnDat/HIPERFACE
16 … 4096 and
8192…524288 (2
n
)
once per turn
(only at A=B=1)
ROD interpolation (3)
Incremental encoder
without data channel
2
2
…2
7
(multiplica
-
tion) TTL line x en
-
coder resolution
encoder signal
passed through
from X1 to X5
Use the NI-OFFSET parameter to adjust + save the zero pulse position within one
mechanical turn. The drivers operate off an internal supply voltage.
The maximum permissible cable length is 100 meters.
Connections and signals for the incremental encoder interface :
Default count direction: UP when the motor shaft is rotating clockwise (looking at the
shaft's end)
52 SERVOSTAR
®
300 Product Manual
Electrical installation 09/2006 Kollmorgen
SERVOSTAR 300