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

Overview of important parameters (see SINAMICS S120/S150 List Manual)
● p0494[0...n] equivalent zero mark input terminal
● p0495 equivalent zero mark input terminal
● p2596 BI: EPOS set reference point
● p2597 BI: EPOS referencing type selection
● p2598 CI: EPOS reference point coordinate, signal source
● p2599 CO: EPOS reference point coordinate value
● p2600 EPOS reference point approach, reference point offset
Parameter p0494 corresponds to parameter p0495 regarding its significance. In addition,
*)
parameter p0494 is dependent on an encoder data set; for example which can be used for
the data set switchover for interchangeable machining heads.
7.8.5

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
selected.
Example with a reduction gear
PROFIdrive
encoder interface
Figure 7-18
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.
Drive functions
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
DQ
DQ
CU MoMo
SMC
Position
Design with a gear between the motor and spindle
*)
*)
Gear
Motor
4 : 1
Encoder
Zero mark
Function modules
7.8 Basic positioner
BERO
Spindle
371