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BECKHOFF
21
Screen page "Homing"
The reference traverse (homing) is an absolute task, that is used to zero the drive for subsequent positioning
operations. You can choose between various types of homing.
After homing, the drive reports "InPosition" and then enables the position controller in the servo amplifier.
Take care that the zero point of the machine (reference point) is in a position that
permits the subsequent positioning operations. The software limit-switches that were
set as parameters may be ineffective. The axis could move on to the hardware
limit-switch or even the mechanical stop. There is a risk of damage.
If the reference point (zero point of the machine) is approached with excessive
velocity, for instance because of high moments of inertia, it may be overshot and, in
the worst case, move on to the hardware limit-switch or even the mechanical stop.
There is a risk of damage.
The position controller cannot be operated without first making a reference traverse
(homing).
A homing/reference traverse must be made after the 24V auxiliary voltage has been
switched on.
The start signal must not be removed during homing.
The start signal must remain present until the "InPosition" message appears.
Start
ASCII: MH
Radio button to start homing.
The SW-enable is set automatically when homing starts. Homing will only be started
in OPMODE 8. However, the SW-enable is set in all OPMODES. The drive can
therefore be accelerated by an analog setpoint that is applied, if the START
command is executed in OPMODES1 or 3.
Stop
ASCII: STOP
Radio button to stop (cancel) the homing. The SW-enable remains set!
Setup Software
07/03
Default: -
Default: -
Screen page "Homing"
valid for OPMODE 8
valid for all OPMODES
57
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