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4.1.2.2
Technical specifications of the incremental encoders
Description
This encoder senses relative movements and does not supply absolute position information.
In combination with evaluation logic, a zero point can be determined via the integrated
reference mark, which can be used in turn to calculate the absolute position.
The encoder outputs sine and cosine signals. These signals can be interpolated using
evaluation logic (usually 2048x) and the direction of rotation can be determined. In the
version with a DRIVE-CLiQ interface, this evaluation logic is already integrated in the
encoder.
Function and technical specifications
● Angular measuring system for the commutation
● Speed actual value sensing
● Indirect incremental measuring system for the position control loop
● One zero pulse (reference mark) per revolution
Table 4- 2
Technical specifications for incremental encoders
Encoders
Without DRIVE-CLiQ interface
Incremental encoder sin/cos 1 Vpp,
2048 S/R with C and D tracks
with DRIVE-CLiQ interface
1)
Incremental encoder 22 bits (resolu-
tion 4,194,304, internal 2048 S/R) +
commutation position 11 bits
Mech. speed limit for all incremental encoders: 12000 rpm
1) The "singleturn absolute encoders" are other encoders which can be used as incremental encoders in the SINAMICS
drive system. Use the new DQI encoder generation for new applications. The IC22DQ is superseded by the AS24DQI.
S-1FT7 synchronous motors
Configuration Manual, 09/2018, A5E45099423B AA
Code
Operating volt-
age
IC2048S/R
5 V ± 5%
IC22DQ
24 V
Motor components and options
Max. current
A-B track: Resolution
consumption
incremental (sin/cos
periods per revolution)
140 mA
2048 S/R (1 Vpp)
180 mA
4,194,304
(=22 bits)
4.1 Motor components
Angular error
± 40 "
± 40 "
71
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