Screen Page "Encoder - Beckhoff AX2000 Setup Manual

Screen page "Encoder"

14 Screen page "Encoder"
Cycle time of the encoder emulation: 0.125 µs.
Encoder emulation
ASCII: ENCMODE
Change this only while the amplifier is disabled.
Resolution ROD
ASCII: ENCOUT
Determines the number of increments per turn that are output. Change this only while the amplifier is disabled.
Encoder function (ENCMODE)
ROD (1)
ROD interpolation (3)
The resolution in the controls can be increased by quadruple evaluation of the increments.
38
ID Function Comments
The interface is used as an input.
0 Input
Incremental-encoder emulation. In the servo amplifier, the position of the motor
shaft is calculated from the cyclically absolute signals from the resolver or
encoder. This information is used to create incremental-encoder compatible pulses
(max. 250 kHz). Pulses are given out at the connector X5 as two signals A / B with
1 ROD
a 90° electrical phase difference, and a zero pulse.
Exception: If an encoder with a commutation track is used as the feedback
unit, then the output of the zero pulse is inhibited (data are invalid) until the
zero pulse from the encoder has been evaluated.
SSI-encoder emulation. In the servo amplifier, the position of the motor shaft is
calculated from the cyclically absolute signals from the resolver or encoder. This
information is used to create a position output in a format that is compatible with
the standard SSI-absolute-encoder format. 24 bits are transmitted.
Radio button SINGLE TURN selected:
The upper 12 bits are fixed to ZERO, the lower 12 bits contain the position infor-
mation. For 2-pole resolvers, the position value refers to the position within one
turn of the motor, for 4-pole resolvers it is within half a turn, and for 6-pole
2 SSI
resolvers it is within a third of a turn.
Exception: If an encoder with a commutation track is used as the feedback unit,
then the upper 12 bits are set to 1 (data invalid!) until a homing run is performed.
Radio button MULTI TURN selected:
The upper 12 bits contain the number of motor turns, the lower 12 bits contain the
position information.
Digitization and interpolation of the sine encoder input signals (feedback) to TTL
level incremental output. This function works properly only with sine encoder
ROD Interpo-
3 feedback systems.
lation
The parameter INTERPOLATION determines the multiplier for the number of lines
of the feedback encoder per electrical motor rotation.
07/03
Default: 1
Default: 1024
Feedback system
Resolver
EnDat / HIPERFACE
Incremental encoders
without absolut data
channel
valid for all OPMODES
valid for all OPMODES
Resolution Zero position
one per revolution
16...1024
(only if A=B=1)
16...4096 and one per revolution
n
8192...524288 (2 ) (only if A=B=1)
4...128 analog pass through
TTL lines per sine line from X1 to X5
Setup Software
BECKHOFF