Books and sites on training LAD, CFC, PLC siemens-200/300/400?

Question

Programming

And most importantly, programming in LAD and CFC blocks (their detailed description, etc.). support of already finished projects and creation of new ones when new equipment is commissioned. Once again, I focus on the LAD language, you need to know and understand it well. partners go to damage, connect to cabinets with controllers using LAD schemes to determine equipment malfunction. There is no way to go to specialized courses, you will have to study locally. I would be grateful for any information and advice. Thank you. are connected to cabinets with controllers with LAD diagrams to determine the equipment malfunction. There is no way to go to specialized courses, you will have to study locally. I would be grateful for any information and advice. Thank you. are connected to cabinets with controllers with LAD diagrams to determine the equipment malfunction. There is no way to go to specialized courses, you will have to study locally. I would be grateful for any information and advice. Thank you.

Answer 1

LAD is the first step. Previously, controllers had only discrete data. The task of LAD is to draw a logical circuit (AND - serial chains, OR - parallel). Added more timers and counters.
Then the FBD language appeared - these are the same chains, but for processing integer and fractional numbers. (Operations AND and OR became blocks).
Finally, CFC: firstly, instead of a bunch of chains, everything is drawn on one sheet, and secondly, feedbacks are possible.
If you want to learn how to program, then you probably need some circuit engineering tutorials.
I advise you not to miss two more languages. Text ST - will help those who wrote ordinary programs. Just remember that any program must be executed from start to finish during the scan.
And finally, what I like is SFC, or state graph: it allows you to break down a task graphically into several pieces, each of which can be programmed in any language. Examples of "Control logic" can be viewed at the "exhibitor" (MatLab representative in Russia). True, I doubt that they will buy MatLab for you, but it will help you master SFC in the future (in Matlab it is called Stateflow and is drawn a little differently).
Try looking for tutorials on Codesys.
For beginners, I came across a playlist Andrey Kulagin .

Answer 2

read PLC programming by Peter, this is so for understanding. And for Siemens, there is Berger Step7 recommended by the manufacturer. Well, look at the CDs with manuals from the manufacturer, there is something to read too.