Rockwell Automation 1760-xxxx Pico Controller User Manual - Manual (Page 177)

Publication 1760-UM001D-EN-P - September 2005
Inside Pico 8-9
If the delay is switched on, Pico checks at 33 ms (40 ms for 50 Hz)
intervals whether there is a half-wave present at an input terminal (1st
and 2nd pulses in A). If Pico detects two pulses in succession, the
device switches on the corresponding input internally.
If this is not the case, the input is switched off again as soon as Pico
does not detect two successive half-waves (1st and 2nd pulses in B).
If a button or switch bounces (A), the delay time may be extended by
33 ms at 60 Hz (40 ms at 50 Hz) (A).
If the input delay is switched off, the delay time is reduced.
• On-delay
– 16.6 ms at 60 Hz, 20 ms at 50 Hz
• Off-delay:
– I1 to I6 and I9 to I12: 16.6 ms at 60 Hz, 20 ms at 50 Hz
– I7 and I8: 100 ms at 60 Hz and 50 Hz (1760-L12AWA-xx)
– I7 and I8: 16.6 ms at 60 Hz, 20 ms at 50 Hz (1760-L18AWA-xx)
Pico switches the contact as soon as it detects a pulse (A). If no pulse
is detected, Pico switches off the contact (B). The procedure for
changing the delay times is described in Activate Debounce (Input
Delay) on page 6-10.
1. 1.
S1
A B
A
1. 1.
B
S1