Technical data

Technology functions
CPU 317T: Technology Functions
A5E00251798-03
6-11
6.2.2 FB 403 MC_Home - Axis homing / setting
Purpose
• The technology function "MC_Home" establishes a position-based relationship
between the control and the mechanical system by means of a measuring
system.
• The technology function "MC_Home" homes an axis or sets an actual position
value.
• The mode for determining / setting the homing position is defined at the Mode
input.
• The homing mode (active or passive) is determined only at the technology
function. Active homing can be set in your axis configuration.
• The assigned position value is an absolute value, and allows absolute and
relative motions based on its value.
• The function terminates when either the homing position or the assigned
position is reached.
• Override characteristics with active homing, and when a further function is
started during the motion (e.g. "MC_Stop".)
• Status information output as permanent signal, depending on Execute, or
temporary in a cycle.
• Adjustment of the actual value
• For active homing, the direction and velocity of the axis for detecting the
homing position are configured in the axis configuration (S7T Config.)
• Input parameter Mode = 6 can be used to shift the position within the base
coordinate system. Possible is only a shift which is relative to the setpoint
value.
• Input parameter Mode = 7 can be used to shift the position within the
superimposing coordinate system. Possible is only a shift which is relative to
the setpoint value.