Referencing With Several Zero Marks Per Revolution - Siemens SINAMICS S120 Function Manual

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Referencing with several zero marks per revolution

The drive detects several zero marks per revolution when using reduction gears or

measuring gears. In this cases, an additional BERO signal allows the correct zero mark to be

Example with a reduction gear

encoder interface

The diagram shows an application example for referencing with several zero marks per

revolution and selecting the correct zero mark using a BERO signal.

By using a reduction gear between the motor and the load (spindle), the drive detects

several revolutions of the motor per mechanical revolution of the load - and therefore also

several encoder zero marks.

The higher-level control/position control when referencing requires a unique reference

between the encoder zero mark and the machine axis (load/spindle). This is the reason that

the "correct" zero mark is selected using a BERO signal.

Drive functions

Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3

Design with a gear between the motor and spindle

Function modules

7.8 Basic positioner