[?]: from where should I start to study PLC ?

[romany_i]

i'm studying electrical engineering..
and i want to start study PLC but i don't know from where should i start...
so please any one has any idea about the way should i study PLC

but i don't know what these documentation means
but if you please determine for me
what document should i start with it will be helpful for me
thx again

[CoMod]

i'm studying electrical engineering..

from LAD language = ladder diagram ~= electrical scheme

and FBD language = function block diagram ~= digital scheme


see Simatic Step by Step 2004
and other documentation from
http://plc.net.ru/viewtopic.php?t=6277

[Schtiel]

You can read PLC basics here:
http://www.plcs.net/contents.shtml

Also I recommend a free book "Automated Manufacturing Systems with PLCs" by Hugh Jack:
http://www.eod.gvsu.edu/~jackh/books/plcs/