Homing - Siemens SIMATIC S7-1500 Function Manual

6.6.4.6

Homing

Homing means matching the position value of a technology object to the real, physical
location of the drive. Absolute positions on the axis can only be approached with a homed
axis.
In S7-1500 Motion Control, axis homing is implemented with the Motion Control instruction,
"MC_Home". A distinction is made between the following operation modes of the Motion
Control instruction:
Operation modes of the Motion Control instruction "MC_Home"
● Active homing
● Passive homing
● Direct homing absolute
● Direct homing relative
S7-1500 Motion Control V13 Update 3
Function Manual, 07/2014, A5E03879256-AC
6.6 Configuring the positioning axis/synchronous axis technology object
In active homing mode, the Motion Control instruction "MC_Home" performs the
configured home position approach. Active traversing motions are aborted. When the
homing mark is detected, the position of the axis is set according to the configuration.
During passive homing, the motion control instruction "MC_Home" does not carry out any
homing motion. The traversing motion required for this step must be implemented by the
user via other motion control instructions. Active traversing motions are not aborted upon
start of passive homing. When the homing mark is detected, the axis is set according to
the configuration.
The axis position is set regardless of the homing switch. Active traversing motions are not
aborted. The value of input parameter "Position" of motion control instruction "MC_Home"
is set immediately as the home position of the axis.
The axis position is set regardless of the homing switch. Active traversing motions are not
aborted. The following statement applies to the axis position after homing:
New axis position = current axis position + value of parameter "Position" of instruction
"MC_Home".
Configuring
135