Siemens SIMATIC S7-1500 Function Manual page 137

Zero mark via PROFIdrive frame and proximity switch
Enable direction reversal at the hardware limit switch
Select this check box to use the hardware limit switch as a reversing cam for the home
position approach. After the axis has reached the hardware limit switch during active homing,
it is ramped down at the configured maximum deceleration rate and the direction is then
reversed. The proximity switch is then sought in the reverse direction. If this function is not
enabled and the axis reaches the hardware limit switch during active homing, then the drive
is disabled and braked with the ramp configured in the drive.
Approach direction
Select the approach direction for seeking the proximity switch.
"Positive" is the approach direction in the direction of positive position values; "negative" in
the direction of negative position values.
Homing direction
Select the direction in which the zero mark should be approached for homing.
Approach velocity
In this field, specify the velocity at which the proximity switch is sought during the home
position approach. A possibly configured home position offset is traversed with the same
velocity.
Homing velocity
In this field, specify the velocity at which the axis approaches the zero mark for homing. For
zero mark detection, the proximity switch must be exited.
Home position offset
In the case of a differing zero mark position and home position, enter the corresponding
home position offset in this field. The axis approaches the home position at approach
velocity.
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 = 5.
S7-1500 Motion Control V13 Update 3
Function Manual, 07/2014, A5E03879256-AC
6.6 Configuring the positioning axis/synchronous axis technology object
Configuring
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