LOGO! Basic functions - AND OR NAND NOR XOR NOT & Edge | Siemens PLC Programming

Useful details on LOGO! Basic Functions, AND, AND Edge, NAND, NAND Edge, OR, NOR, XOR and NOT.
0:00 - Intro and electronic logic gate equivalents
0:16 - The eight Basic Functions
0:38 - NOT
1:03 - NAND | NOR
1:21 - AND - NAND | OR - NOR
3:31 - XOR (ExOR)
3:55 - Ladder equivalents
5:30 - AND Edge | NAND Edge
8:32 - Recap
Topics covered.
Default values for unconnected inputs.
Use of Invert Connector.
AND Edge and the NAND Edge single-scan pulse.
Why ladder conversion may be sub-optimal for high speed applications.
See quickplc.com/?Video_tutorials for a list of all instruction tutorials.

[@Icemanja2006]

Great gate explanation ❤

[@torgnycedving7909]

It has been a long time since I attended the training. I hope I remember correctly and can explain. In one of the exercises I got mysterious errors when driving, most of the program laps it worked but sometimes I got wrong signals. I had written my code in the reverse order of the video. the solution to get rid of these inconsistent error behaviors was to rewrite all the code so it was in the same order as in the video. the teacher's explanation was something about the plc needing a whole var to update all the variables in the program code that interprets our connection

[@QuickPLC-kh5of]

Thanks, Torgny.
In most PLCs running ladder it is very easy to see the execution order. I will do some more experiments and some more web searching.
Thank you for your feedback. Happy coding.

[@MegaBanannaman]

Great videos and definitely the best I've come across (I'm studying EE lvl 3). The only improvements in my opinion would be some real life examples of how the less common blocks could be used. Eg, in what scenario would edge be useful.

[@QuickPLC-kh5of]

Thanks for the feedback. I want to finish off the basic operation tutorials first but may slip in some application videos too. I'll take note of your suggestion for edge-trigger applications.