One Pb-----latch/unlatch

[Mr JJ 0]

Any ideas on logic how to set and reset an output bit with one momentary input bit. I have done it with four rungs. I would like to do it with less. Thank you all

[Guest]

one rung ... three instructions ... but I'm not saying that it's pretty ... Edited 15 Mar 2006 by Ron Beaufort

[TechJunki 0]

Two rung version Pushbutton is B3:0/0 and toggle output is N7:0/1

[mgvol 0]

Try looking here, but it's more of what has already been offered up. http://www.patchn.com/flipflop.htm

[TimWilborne 108]

Heres mine Edit - Ron, you beat me on this one! Along with a few others while I was talking to someone but Ron knows what I am talking about Edited 15 Mar 2006 by TWControls

[Spedley 0]

I liked TechJunki's answer so I modified it to put it on 1 rung and removed the one-shot bit (only one temp bit required) ... for no particular reason. I personally use: SOR XIC I:1.0/0 OSR B3:0/2 BST XIC B3:0/0 OTE B3:0/1 NXB XIC B3:0/1 OTU B3:0/0 NXB XIO B3:0/1 OTL B3:0/0 BND EOR because I thnk it's the most clear for maintenance personel. The first branch takes a copy of the bit and the second and third branches modify the original based on the copy.

[D&D Logix s.r.o. 0]

use the button to advance a counter, then use the counter.acc/0 (lowest Bit) to toggle the output Once the counter reacheches Max value, it will go Min value by itself, so no worries.

[paulengr 44]

You guys beat mine which is clear but ugly...in pseudo-code: <trigger><one shot> if toggle=true, set temp If temp=true, unlatch toggle If temp=false, latch toggle The temp bit just holds the toggle bit state so that the toggle bit can be correctly set.