Rockwell-automation 1772-LP3 PLC - 2/30 Programmable Controller Progra Manuel d'utilisateur Page 73

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 346
  • Table des matières
  • DEPANNAGE
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 72
Introduction to Programming
Chapter 4
49
The branch instructions allow more than one combination of input
conditions to energize an output device (Figure 4.11).
These are two branch instructions:
Branch Start
Branch End
Figure 4.11
Branching
Instructions
||
11
()
00
111 010
||
12
111
Two
Branch
Start
Instructions
A
Single
Branch End
Instruction
T
wo Possible Paths for
Logic Continuity (ORLogic)
Branch Start
This instruction begins each parallel logic branch of a rung. The Branch
Start is programmed immediately before the first instruction of each
parallel logic path.
Branch End
This instruction completes a set of parallel branches. The Branch End is
entered after the last instruction of the last branch to end a set of parallel
branches.
Branch instructions must be entered in the correct order for proper logic
function. The only limitation is that a nested branch (a branch within a
branch) cannot be programmed directly (Figure 4.12).
4.3.3
Branch Instructions
Vue de la page 72
1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 345 346

Commentaires sur ces manuels

Pas de commentaire