Rotor Position Synchronization - Siemens SINAMICS S120 Getting Started

Inverting values
As the mounting direction of the encoder (at the right- or left-hand side) cannot be defined,
but depends on the specific motor being used (linear motor, torque motor, etc.), where
appropriate, invert the position and the speed in order to reverse the direction.
1. Select the "Actual speed value inverted" option (p0410.0)
2. Select the "Actual position value inverted" option (p0410.1)
Parameterizing the measuring gearbox position tracking
Position tracking enables the load position to be reproduced when using gearboxes. It can
also be used to extend the position range.
1. Activate the position tracking for measuring gearboxes.
2. Select whether the position tracking should be made for a rotary axis or linear axis
(p0411).
A rotary axis is considered to be a modulo axis (modulo correction can be activated by a
higher-level controller or EPOS). For a linear axis, the position tracking is used principally
to extend the position range (see "Virtual multiturn resolution").
Virtual multiturn resolution
With a rotary absolute encoder (p0404.1 = 1) with activated position tracking (p0411.0 = 1),
the virtual multiturn resolution (p0412) can be used to enter a virtual multiturn resolution.
This makes it possible to generate a virtual multiturn encoder (r0483) from a singleturn
encoder. The virtual encoder range must be able to be represented via r0483.
When no measuring gearboxes (n = 1) are present, the value in p0421 replaces the actual
number of stored revolutions of a rotary absolute encoder. Increasing this value extends the
position range (see linear axis). When measuring gearboxes are present, this value sets the
resolvable motor revolutions represented in r0483.
Tolerance window
After switch on, the difference between the stored position and the current position is
determined and initiated depending on the following:
● Difference within the tolerance window: The position is reproduced based on the current
encoder actual value.
● Difference outside the tolerance window: Message F07449 is issued.
● The tolerance window is preassigned to the encoder range quadrant, although it can be
changed.
6.3.1.8

Rotor position synchronization

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Getting Started, 12/2018, 6SL3097-5AG30-0BP0
"Drive axis > Parameters > Basic parameterization > Rotor position synchronization"
Performing basic parameterization
6.3 Drive axes
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