SIEMENS
3.7/2
Siemens PM 21 · 2017
SIMOTION system components
Measuring systems
Motion Control Encoder measuring systems
3
7
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Overview
Motion control encoders are optoelectronic built-on encoders
that detect the traversing distances, angles of rotation, speeds
or positions of machine axes. Motion control encoders are direct
measuring systems that are built-on to shafts, axes or motors.
They can be used in conjunction with numerical and
programmable logic controllers, drives and position displays.
Motion control encoders are system-tested, certified
components that have been harmonized for use with the
following systems:
•
SINUMERIK CNC controls
•
SIMOTION Motion Control Systems
•
SIMATIC programmable logic controllers
•
SINAMICS drive systems
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Application
Motion control encoders are used with machine tools and
production machines as additional external measuring systems.
They are available as incremental or absolute encoders.
•
In the case of incremental encoders, the machine must travel
to a reference point after each power-off state, as the position
is not usually stored in the controller, and movements of the
machine while the power is off are not recorded.
•
Absolute encoders, on the other hand, also record
movements while the power is off and return the actual
position after power on. Travel to a reference point is not
necessary.
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Design
All motion control encoders are available in Synchro flange and
clamp flange versions. The absolute encoders are also available
with a hollow shaft and torque arm.
The motion control encoders are driven via a plug-in coupling or
spring disk coupling. Alternatively, pulleys can also be used.
The motion control encoder supply voltage is 5 V DC or
alternatively 10 to 30 V DC. The 10 to 30 V DC version supports
longer cable lengths. Most control systems apply the supply
voltage directly on the measuring circuit connector. With
SINAMICS, the measuring systems are provided with power via
the Sensor Modules.
For motion control encoders with cables, the cable length
including the connector is 1 m (3.28 ft).
The following bending radii must be observed for the cable to
the built-on encoder:
•
One-time bending:
20 mm (0.79 in)
•
Continuous bending:
75 mm (2.95 in)
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More information
For further information on measuring systems, see Catalog
D 21.4 in Chapter Motion Control Encoder measuring systems
and on the Internet at
/industrymall
under Drive Technology > Motors > Motion Control Encoder
measuring systems
Motion Control Encoder measuring systems
Encoder
type
Incremental encoders
Absolute encoders
Interface
sin/cos 1 V
pp
RS422 (TTL)
HTL
DRIVE-CLiQ
SSI
EnDat
PROFIBUS DP
PROFINET IO
Resolution
1000 S/R
1024 S/R
2500 S/R
500 S/R
1000 S/R
1024 S/R
1250 S/R
1500 S/R
2000 S/R
2048 S/R
2500 S/R
3600 S/R
5000 S/R
100 S/R
500 S/R
1000 S/R
2500 S/R
Single-turn
24 bit
Multi-turn
36 bit
(24 bit single-
turn +
12 bit multi-turn)
Single-turn
13 bit
(8192 steps)
Multi-turn
25 bit
(8192 steps
4096
revolutions)
Single-turn
13 bit
(8192 steps)
Multi-turn
25 bit
(8192 steps
4096
revolutions)
Single-turn
13 bit
(8192 steps)
Multi-turn
27 bit
(8192 steps
16384
revolutions)
Single-turn
13 bit
(8192 steps)
Multi-turn
27 bit
(8192 steps
16384
revolutions)
Catalog
D 21.4
© Siemens AG 2017