Festo Контроллер позиционирования CPX-CMAX - Manual (Page 41)

2. Fitting and pneumatic installation
2−11
Festo P.BE−CPX−CMA X−SYS−EN en 0908NH
Note
If the positioning range of the drive is longer than the
effective stroke of the displacement encoder:
· Limit the positioning range using shock absorbers or
stops, so that the position measuring system covers the
complete possible positioning range. In this way you can
protect the displacement encoder from damage.
External potentiometer position measuring system
If analogue displacement encoders are used (e.g. type
MLO−POT−...), the following applies:
In combination with the CMAX, an electric reserve of
ţ 0.3%
of the nominal length is required at both end positions (does
not apply for the integrated system in the case of DSMI).
Example:
Nominal length of the displacement encoder: 1000 mm
Electric effective length: Approx. 1006 mm
} Permissible effective path: 0 ... 1000 mm
If the slide of the displacement encoder leaves the
permissible effective path, the CMAX will generate a
corresponding error message. To avoid these error messages,
limit the positioning range so that the slide of the displaceĆ
ment encoder is always within the permissible effective path.