Siemens SINAMICS S120 Function Manual page 235

Figure 6-14
In this case, for each encoder overflow, there is a load-side offset of 1/3 of a load revolution,
after 3 encoder overflows, the motor and load zero position coincide again. The position of
the load can no longer be clearly reproduced after one encoder overflow.
If position tracking is activated via p0411.0 = 1, the gear ratio (p0433/p0432) is calculated
with the encoder position actual value (r0483).
Figure 6-15
Measuring gear configuration (p0411)
The following points can be set by configuring this parameter:
● p0411.0: Activation of position tracking
● p0411.1: Setting the axis type (linear axis or rotary axis)
● p0411.2: Reset position
Drive functions
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Drive with odd-numbered gears without position tracking
Odd-numbered gears with position tracking (p0412 = 8)
Here, a rotary axis refers to a modulo axis (modulo offset can be activated through
higher-level control or EPOS). With a linear axis, position tracking is mainly used to
extend the position area (see section: Virtual multiturn encoder (p0412)).
Overflows can be reset with this. This is required, for example, the encoder is turned by
more than 1/2 the encoder range while switched off.
Basic functions
6.17 Position tracking
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