Festo CPX System Manual page 204

C. General information on parametrisation
1
Sensor signal
2
Logical CPX
signal
3
Change of edge
within the signal
extension time
Fig. C/2: Change of edge within the signal extension time
C−6
Mode of operation
Signal states accepted as logical input signals usually remain
valid at least until the specified minimum signal duration has
expired. Change of edge within the minimum signal duration
are ignored (see Fig. C/2). Fixed debounce times remain ef
fective.
Case 1: Change of edge within the signal extension
time
The logical CPX signal is supplied when the signal extension
time and, if applicable, the debounce time has expired.
a) Rising edge
1
1
0
1
2
0
b) Falling edge
1
1
0
1
2
0
Expiration of the debounce time
3
Expiration of the signal extension time
Festo P.BE−CPX−SYS−EN en 0902e
3