opinion on Schneider PLC’s?

[nadia1]

I have used them for most of my career. They have their idiosyncrasies like any platform but are really quite easy to use and integrate well with devices from other vendors. I also teach PLC programming as one of my jobs and find the students pick it up pretty quickly using the M340 (the M580 uses the same programming software). Probably the best thing about Schneider is that you can choose to use tag or memory based addressing. Tags all have a name but you can choose to locate them in a particular memory address if you need to. You can also use literal memory addresses in the code without referencing tag names. Schneider's ladder logic is absolutely , but their FBD is much better than AB's in my humble opinion and limited experience. Also, their SFC is good. I personally prefer the ST in AB's CCW because it prompts you for the function arguments. I haven't used ST in Logix 5000 though, so I can't really comment on that. Edit: I'm in new Zealand so can't comment on the supply issues you may have in your country.