Detailed description
2.7 Structure and functions of the basic program
Power Line Basic PLC Program (P3)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-43
2.7 2.7 Structure and functions of the basic program
General
The program is modular in design, i.e., it is structured according to NCK functions.
In the operating system, a distinction is made between the following levels of execution:
• Startup and synchronization (OB 100)
• Cyclic mode (OB 1)
• Process interrupt handling (OB 40)
Each section of the basic program - as illustrated in the figure below - must be called by the
user in OBs 1, 40 and 100.
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