Automating with SIMATIC S7-1200 : Configuring, Programming and Testing with STEP 7 / Hans Berger
Berger Hans 
3rd, comp., rev. and enlarged ed.
Erlangen Publicis Publishing 2018 . - 727 s.
ISBN 978-3-89578-470-5
jazyky programovacie programovací jazyk SIMATIC S7-1200 Step 7
príručka