Festo CP-E08-M8-CL - Page 123

A. Technical appendix
A−25
Festo P.BE−CPEA−CL−E N en 0711a
Method 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.A/2). Fixed debouncing times remain
effective.
Case 1: Change of edge within the signal extension
time
The logical CPI signal is supplied when the signal extension
time and, if applicable, the debouncing time has expired.
1 Sensor signal
2 Logical CPI signal
3 Change of edge
within the signal
extension time
0
1
0
1
0
1
0
1
a) rising edge
Expiry of the debouncing time
Expiry of the signal extension time
b) falling edge
1
2
1
2
3
3
Fig.A/2: Change of edge within the signal extension time