10.6.4.1 Terms for homing
Overview
After switching on the machine, the absolute dimensional reference to the machine zero must
be created for positioning. This progress is called homing. The following terms are relevant to the
homing.
Description
Homing mark
A homing mark is an input signal, on whose occurrence a known mechanical position can be
assigned to the actual values.
A homing mark can be:
• A zero mark
The zero mark of an encoder or an external zero mark via digital input is used as a homing
mark.
Reference cam
If there are several zero marks in the traversing range, the reference cam is used to select a
specic zero mark before or after the reference cam.
The reference cam is evaluated with the settings of the telegrams 111 and 112 via the higher-
level control system. Alternatively, there is also the possibility to evaluate the reference cam
via a digital input of the converter. For this purpose, a digital input must be parameterized as
the reference cam selection 2.
Homing mark position
This is the position assigned to the homing mark.
With active homing, the homing mark position corresponds to the home position minus
home position oset.
With passive homing, the homing mark position corresponds to the home position.
Home position
At the end of the active homing motion, the axis arrives at the home position.
Home position oset
The dierence between the home position and the homing mark position is the home
position oset.
Approach velocity
Up to three parameterizable approach velocities are available:
• to the reference cam
• to the zero mark
• to the home position
Functions
10.6Basic positioner (EPOS)
SINAMICS S200 PROFINET servo drive system with SIMOTICS S-1FL2
Operating Instructions, 11/2023, FW V6.3, A5E51646752B AB 377