Debounce

Hi!

1) Has Logo! bounce protection? It's not written in the user manual, so it doesn't have it?
2) ​How often can the Logo! change the contents of the memory cells where the contents of the inputs are stored?
The user manual says that for normal digital inputs, the maximum frequency is 4 Hz. 4 Hz corresponds to 0.25 seconds. It turns out that the values ​​of the inputs can only change once every 0.25 seconds, although the program cycle is much smaller.

For example 6ED1052-1HB08-0BA1 does not have fast inputs, so its digital inputs can change every 0.25 seconds

This is true?

"Debounce" That's my fault

"Debouncing is removing unwanted input noise from buttons, switches or other user input. Debouncing prevents extra activations or slow functions from triggering too often. Debouncing is used in hardware switches, programs and websites."

LOGO's slow scan rate (4 times per second) makes itself debouncing effective enough. You can freely connect  digital input with physical push button to wiping relay function block Trg input and it will work as expected.

Hi

I have experience with a cheap tumbler switch. When I turned it on slowly, there was no bounce effect. Sometimes 2 to 3 pulses occurred when switching on quickly. I had connected the counters directly to the inputs, so it was possible to measure a switching frequency of up to 5 kHz. This way you can check if the switch is bouncing. This was just a testing purposes.

Andrus

 effect. Sometimes 2 to 3 pulses occurred when switching on quickly. I had connected the counters directly to the inputs, so it was possible to measure a switching frequency of up to 5 kHz. 

Inputs I3-I6 are fast counting inputs. But they only work with frequency up to 5kHz if input is directly connected to counter's FB input. For all other FB-s, LOGO typical slow scancycle remains.

This is also reason why one cannot program incremental encoder decoding in LOGOSoft, despite presence of high-speed count inputs.