Printed in the Federal Republic of Germany
TR-Electronic GmbH 2005, All Rights Reserved
01/16/2015
TR - ECE - BA - DGB - 0045 - 03
Page 87 of 135
5.4 Incremental
– interface (optional)
5.4.1 Cable definition
Signal
Line, e.g. 64-200-021: 2x2x0.25+3x0.14+2x0.5 mm
2
A+ / A
–
min. 0,25mm
2
, twisted in pairs and shielded
B+ / B
–
R+ / R
–
min. 0,14mm
2
, twisted in pairs and shielded
5.4.2 Data transmission
Angular increments are recorded via a pulse disk with a fixed number of cycles per
revolution. A scanning unit with an integrated optoelectronic system generates
electrical signals and emits pulses (measuring increments) which are pre-processed at
trigger stages.
The resolution of the measuring system is defined via the number of light/dark
segments (number of increments per revolution) on the pulse disk. For e.g. the
measuring system outputs a signal sequence of 2048 pulses while completing a single
revolution.
In order to evaluate the code sequence, a 2
nd
signal sequence with a 90° phase offset
is output for the control.
The counter of an external control system can be reset with the additional zero pulse
in order to define the mechanical control reference point.
For e.g. the measuring system outputs 8192 steps/revolution (absolute position) and a
signal sequence of 2048 impulses of the incremental signals. Thus the resolution
(impulses/revolution) of the incremental signals corresponds to the resolution
(steps/revolution) of the absolute position, the connected incremental counter must
perform a four-fold evaluation:
Reference signals not represented!
A
/A
B
/B
single
double
quad
Evaluation
Counter
8192 steps/revolution
= 2048 pulses
of channel A e.g.
2048 pulses/rev.
4096 pulses/rev.
8192 pulses/rev.
Edge Evaluation
1
1
1
1
2
1
2
1
2
1
3
1
3
1
3
2
4
2
4
2
4
Measuring system
1
2
3
1
1
2
4
2
4
2
4
2
3
2
3
Figure 5: Incremental signals
