Structure And Functions Of The Basic Program - Siemens SINUMERIK 828D Function Manual

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Structure and functions of the basic program

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:

Start-up and synchronization (OB 100)

Cyclic mode (OB 1)

Process interrupt handling (OB 40)

Diagnostic interrupt, module failure processing (OB 82, OB 86)

Each section of the basic program - as illustrated in the figure below - must be called by the user in OBs 1, 40

Basic Functions

Function Manual, 09/2011, 6FC5397-0BP40-2BA0

P3: Basic PLC Program for SINUMERIK 840D sl

13.8 Structure and functions of the basic program

Sinumerik 840d sl