Siemens SIMATIC S7-1500 Function Manual page 156

Configuring
6.7 Configuring the External Encoder technology object
Zero mark via PROFIdrive frame and proximity switch
Homing direction
Select the direction in which the zero mark should be approached for homing. The next zero
mark after exiting the proximity switch is used.
The following options are available:
● Positive
Axis moves in the direction of higher position values.
● Negative
Axis moves in the direction of lower position values.
● Current
Home position
In this field, configure the absolute coordinate of the home position. The home position
configured here is in effect when the Motion Control instruction "MC_Home" is executed with
Mode = 10.
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).
See also
Configuration - Homing (Page 155)
Zero mark via PROFIdrive frame (Page 157)
Homing mark via digital input (Page 158)
156
The currently effective approach direction is used for homing.
S7-1500 Motion Control V13 Update 3
Function Manual, 07/2014, A5E03879256-AC