Technical data

Configuration
CPU 317T: Technology Functions
A5E00251798-03
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4.5.7 Homing
4.5.7.1 Introduction
Position-controlled axes equipped with incremental motor measuring systems must
be referenced to the position of the mechanical system of the machine each time
they are switched on. The axis is synchronized during homing based on the input
of a certain position value at a defined position of the drive mechanism.
Axes can be homed in:
• active mode (reference point approach)
• passive mode (homing on-the-fly)
• direct mode (with position preset)
Detailed settings depend on the measuring systems available for measuring the
homing position and on the motion an axis may perform for homing.
4.5.7.2 Active homing
Active homing
Active homing can be configured in S7T Config, in the Axis > Homing dialog box,
"Homing" tab.
There modes are available for active homing:
• Homing with BERO (homing cam) and zero mark
• Homing with BERO only
• Homing with zero mark only.
Start of the homing function:
MC_Home
Mode = 0
Determination of the homing position, based on the axis
configuration
Mode = 1
Position = x
Determination of the homing position, based on the axis
configuration The homing position is assigned the value at
input parameter Position.
After successful homing, the status Statusword.HomingDone = TRUE is indicated
in the technology DB of the axis.