Instruction Manual

6. Diagnosis and fault display

6−20

Festo P.BE−GDCP−SFC−LACI−PB−E N en 0812NH

6.7 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. After 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 the 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 would 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