User Manual

6. Diagnosis and fault display
6−18
Festo GDCP−SFC−LACI−DN−EN en 0812NH
6.6 Warning Index pulse warning"
In the homing run to the proximity sensor, the drive initially
moves into the switching range of the sensor and then
reverses. A
fter the switching range is exited, the SFC−LACI
searches for the nearest index pulse. This applies as the
homing point.
Note
Material damage due to moved measuring reference
system
The following situation arises if the switching point of the
proximity sensor and th
e index pulse lie very close to one
another: Should the switching point move (e.g.due to
temperature influence) such that it then lies
behind the
index pulse, then the SFC−LACI will use the index pulse
after that as a reference point. The entire measuring
reference system w
ould then be offset by 2 mm in
DFME−...−LAS, in DNCE−...−LAS: by 5 mm.
Remedy:
1. Check the distance of the switching point to the index
pulse:
See FCT, Homing" page, Homing" register
(or CI 2FFE/0Dh, see appendix B).
2. Then move the proximity sensor a few tenths of a mm.
1 Switching range
of the proximity
sensor
2 Index pulses
(every 2 or 5mm)
3 Recommended
position: in the
centre between
two index pulses
REF
1
2
3