Terms - Siemens SIMATIC S7-1500 Function Manual

Basics
3.14 Homing
Homing mode
Depending on the type of homing mark and of the homing mark search, a distinction is made
among the following homing modes (Page 41):
● Homing with zero mark via PROFIdrive frame and proximity switch
● Homing with zero mark via PROFIdrive frame
● Homing with digital input
3.14.2

Terms

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 incremental encoder or an external zero mark is used as a homing
mark.
The zero mark is detected at the drive module or encoder module, and transmitted in the
PROFIdrive frame. Perform the setting and evaluation as an encoder zero mark or
external zero mark at the drive module and sensor module.
● An edge at the digital input
The falling or rising edge at a digital input is used as a homing mark.
Proximity switch
If there are several zero marks in the traversing range, the proximity switch permits the
selection of a specific zero mark before or after the proximity switch.
Homing mark position
This is the position assigned to the homing mark.
The homing mark position corresponds to the home position minus the home position offset.
Home position
At the end of the active homing motion, the axis arrives at the home position.
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S7-1500 Motion Control V13 Update 3
Function Manual, 07/2014, A5E03879256-AC