Setting The Reference Point Approach - Siemens SINAMICS G120 Instruction Manual

Set the reference point and adjust the absolute encoder
The converter takes the reference point coordinate as the new axis position.
6.6.2

Setting the reference point approach

Description
A reference point approach generally consists of the following three steps:
1. Travel to reference cam.
When it receives a signal, the axis searches for the reference cam in a specified direction.
2. Travel to zero mark.
Once the reference cam is reached, the axis changes the traversing direction and evaluates
the zero mark of the encoder.
3. Travel to reference point.
Once the zero mark is reached, the axis traverses to the reference point and synchronizes the
actual position value in the converter with the machine.
Step 1: Travel to reference cam
The converter accelerates the axis in the start direction to the "Approach velocity". Once the axis
has reached the reference cam, in step 2, the converter switches to the reference point approach.
Reversing cams make sense if the reference cam does not extend up to the end of the traversing
range. After reaching a reversing cam, the converter continues to search for the reference cam
in the opposite direction.
Figure 6-8
Basic positioner
Function Manual, 09/2020, FW V4.7 SP13, A5E34257659B AG
Step 1: Travel to reference cam
Commissioning
6.6 Referencing
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