Drivedata DR2 Spécifications Page 125

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 373
  • Table des matières
  • DEPANNAGE
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 124
8.2
Program structure
8
-3
8.2 Program structure
A STEP7 structured program consists of blocks, each of which in turn consists of networks (see
the figure below). Each network can be expressed either in LAD, FBD, or STL. Thus a block
can consist of mixed LAD and STL networks, or mixed FBD and STL networks. LAD and
FBD networks, however, cannot be mixed in a block.
While most instructions can be written in any of LAD, FBD, and STL, the LOOP, variable-
address, and some other STEP7 instructions can be written only in STL. In such a case, LAD
and STL networks need to be mixed.
I 0.0
I 0.2
I 0.1
Q 1.0
O I 2.0
O I 2.1
= Q 3.0
I 4.2
M5.1
M 5.0
Network 1
Network 2
Network 3
M5.0 I 6.2 Q 5.0
Network 4
( )
( )
( )
I
I 4.0
( )
( )
Vue de la page 124
1 2 ... 120 121 122 123 124 125 126 127 128 129 130 ... 372 373

Commentaires sur ces manuels

Pas de commentaire