Setting The Flying Referencing - Siemens SINAMICS G120D Original Instructions Manual

Setting functions
8.6 Basic positioner and position control
8.6.7.3

Setting the flying referencing

Description
During motion, the load passes a reference cam. The converter evaluates the reference cam
signal via a suitable fast digital input, and corrects its calculated position during travel. The
fast digital inputs of the converter used for flying referencing are also called probe inputs.
For flying referencing, the converter corrects the position setpoint and actual value
simultaneously.
If the position actual value correction means that the axis has already passed the point
where it should start braking, then the axis travels beyond the target and approaches the
target from the opposite direction.
Figure 8-30
The converter sets the "Reference point set" signal back to zero after its supply voltage is
switched off and switched on again. The converter only corrects its position actual value for a
1 signal from "Start referencing". In this way, you can define, for example, the direction of
travel when the converter is referencing.
Setting flying referencing
Precondition
1. You have selected the "Homing" screen.
2. You have come to the settings via the button on the screen.
3. You have selected "Passive homing".
176
Flying referencing
Converter with control units CU250D-2
Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA