1. Introduction to S7-1200

2. S7-1200 Family

3. Memory Management

4. S7-1200

5. The S7-1200 family provides a variety of signal modules and signal boards for expanding the capabilities of the CPU.

6. Scan time

7. Operating Mode of CPU

8. CPU Operating Modes

9. S7-1200 Data Types

10. S7-1200 Memory Type

11. Input addressing

12. Output addressing

13. Memory Addressing

14. Data Block

16. Data Block (DB)

17. DB Addressing

18. Addressing Examples

19. OB, FC, FB, DB

20. Organization Block OBs control the execution of the user program. Each OB must have a unique OB number. Some default OB numbers are reserved below 200. Other OBs must be numbered 200 or greater. OBs cannot call each other or be called from an FC or FB. Only a start event, such as a diagnostic interrupt or a time interval, can start the execution of an OB. The CPU handles OBs according to their respective priority classes, with higher priority OBs executed before lower priority OBs. The lowest priority class is 1 (for the main program cycle), and the highest priority class is 27 (for the time-error interrupts)

21. System Clock Memory

22. Portal and project view

23. Component of the project view

24. Project Tree