Technical data

Drive functions
7.3 Function modules
Function Manual
Function Manual, 06/2012, 6SL3097-4AB10-0BP4
219
Load gear position tracking
Terminology
● Encoder range
The encoder range is the position area that can itself represent the absolute encoder.
● Singleturn encoder
A singleturn encoder is a rotating absolute encoder, which provides an absolute image of
the position inside an encoder rotation.
● Multiturn encoder
A multiturn encoder is an absolute encoder that provides an absolute image of several
encoder revolutions (e.g. 4096 revolutions).
Description
Position tracking enables reproduction of the position of the load when gears are used. It can
also be used to extend the position area.
With position tracking, a load gear can also be monitored if the "position control" function
module is active (p0108.3 = 1).
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Figure 7-42 Overview of gears and encoders
The encoder position actual value in r0483 (must be requested via GnSTW.13) is limited to
2
32
places. When position tracking is switched off (p2720.0 = 0), the encoder position actual
value r0483 comprises the following position information:
● Encoder pulses per revolution (p0408)
● Fine resolution per revolution (p0419)
● Number of resolvable revolutions of the rotary absolute encoder (p0421), this value is
fixed at "1" for singleturn encoders.
When position tracking is activated (p2720.0 = 1), the encoder position actual value r0483
comprises the following:
● Encoder pulses per revolution (p0408)
● Fine resolution per revolution (p0419)
● The gear ratio (p0433/p0432)