Mechanical System - Siemens SINAMICS S120 Commissioning Manual

If the encoder system facilitates calibration of the zero mark position, then fine synchronization
is recommended (p0404.15 = 1). In this case, fine synchronization avoids measurement scatter
and also facilitates an additional check of the determined pole position.
Suitable zero marks are:
• A zero mark in the complete traversing range
• Equidistant zero marks
• Distance-coded zero marks
5.7.3.10

Mechanical system

Overview
In the "Mechanical system" screen form, check the settings of the position control and adjust
them if necessary. Depending on the encoder type selected for position control and the motor
encoder, various configurations are displayed for the mechanical system.
The "Position tracking" option allows the load position to be reproduced when using gearboxes.
This option can also be used to extend the position range. The position tracking of the load gear
however, is only relevant for a motor encoder (encoder 1).
Parameterizing encoder selection for position control
An encoder is assigned to the position control during commissioning. This encoder setting is
shown in a drop-down list at the top right in the "Mechanical system" screen form. You can
change the encoder assignment in this screen form before parameterizing the position control.
The following options are available:
1. Select the required encoder in the "Encoder system" (p2502) drop-down list.
– No encoder
– Encoder 1
– Encoder 2
– Encoder 3
2. Enter the motor revolutions for the gear ratio between the motor shaft and load shaft in the
"Number of motor revolutions" (p2504) field.
3. Enter the load revolutions for the gear ratio between the motor shaft and load shaft in the
"Number of load revolutions" (p2505) field.
4. Enter the neutral length unit LU per load revolution in the "LU per load revolution" (p2506)
field.
5. Interconnect the "Modulo correction activation" (p2577) signal source for the activation of
the modulo correction.
6. Correct the default value for axes with modulo correction in the "Modulo correction modulo
range" (p2576) field.
Commissioning with Startdrive
Commissioning Manual, 06/2020, 6SL3097-5AA10-0BP2
5.7 Basic parameterization of the drive objects
Commissioning
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