User manual

Publication 1760-UM001D-EN-P - September 2005

8-8 Inside Pico

An input signal, S1, must be present at the input terminal for at least

20 ms before the switch contact will change from 0 to 1 (A) in the

program. If applicable, this time must also include the program cycle

time (B) since Pico does not detect the signal until the start of a cycle.

The same debounce delay (C) applies when the signal drops out from

1 to 0.

Typical delay times with the input debounce delay turned off are a

few hundred µs, and are given in the specifications in Appendix A.

Delay Times for Pico AC Units (1760-L12AWA-xx and

1760-L18AWA-xx)

The input delay with AC voltage signals depends on the frequency:

• On-delay:

– 66 ms at 60 Hz, 80 ms at 50 Hz

• Off-delay:

– I1 to I6 and I9 to I12: 66 ms at 60 Hz, 80 ms at 50 Hz

– I7 and I8: 150 ms at 60 Hz, 160 ms at 50 Hz

(1760-L12AWA-xx)

– I7 and I8: 66 ms at 60 Hz, 80 ms at 50 Hz (1760-L18AWA-xx)

IMPORTANT

Check that there is no electrical interference affecting

the input signals when the input delay is disabled.

Pico responds even to very short signals.

2.1. 2.1.