Siemens SIMATIC S7-1500 Function Manual page 45

Motion sequence
The motion occurs in the following sequence:
1. Start of active homing via the Motion Control instruction "MC_Home"
2. Approach to the proximity switch
3. Detection of the proximity switch in the homing direction, while moving at homing velocity
4. Departure from the proximity switch, and approach to the homing mark
5. Detection of the homing mark
6. Approach to the home position
See also
Homing SINAMICS drives with external zero marks (Page 396)
S7-1500 Motion Control V13 Update 3
Function Manual, 07/2014, A5E03879256-AC
With the departure from the proximity switch, the detection of the homing mark is
enabled.
When the homing mark is detected, the position of the technology object is set depending
on the configured mode:
– Parameter "Mode" to "MC_Home" = 3
Position = value in parameter "Position" minus
<TO>.Sensor[n].ActiveHoming.HomePositionOffset
– Parameter "Mode" to "MC_Home" = 5
Position = value in the tag <TO>.Homing.HomePosition minus
<TO>.Sensor[n].ActiveHoming.HomePositionOffset
Note
Parameter "MC_Home.Mode"
The "MC_Home.Mode" parameter for S7-1200 Motion Control and S7-1500 Motion
Control has been standardized within the framework of technology version V2.0. This
results in a new assignment of the parameter values for the "MC_Home.Mode"
parameter. A comparison of the "MC_Home.Mode" parameter for technology versions
V1.0 and V2.0 is available in the section Version overview (Page 86).
– Parameter "Mode" to "MC_Home" = 3
The axis moves to the position that is specified in the "Position" parameter.
– Parameter "Mode" to "MC_Home" = 5
The axis moves to the position that is specified in the <TO>.Homing.HomePosition
tag.
Note
If the velocity on the span from the detection of the proximity switch to the zero mark
cannot be reduced to the homing velocity, then homing occurs at the velocity that exists
when the zero mark is traversed.
Basics
3.14 Homing
45