Organization Blocks - Siemens S5-100U User Manual

Introduction to STEP 5
Figure 7-4 shows how to set up a structured control program. It also illustrates the significance of

organization blocks.

System program
*
For CPU 103 and higher
7-10
OB21/OB22
OB1
Control program
Figure 7-4. Example of Organization Block Use
PB1 SB1*
FB2 FB61
S5-100U
EWA 4NEB 812 6120-02