Structure And Functions Of The Basic Program - Siemens SINUMERIK 840D sl Function Manual

Figure 13-9
13.10

Structure and functions of the basic program

General
The PLC program has a modular structure. The organization blocks (OB) form the interface
between the operating system and the basic and user programs.
● Restart (warm restart) with start-up and synchronization (OB100)
● Cyclic operation (OB1)
● Process alarms (OB40)
● Asynchronous errors: Diagnostics alarm (OB82), module failure (OB86)
The calls of the function blocks of the basic and user programs must be programmed by the
user in the organization blocks (OB).
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Interface to and from machine control panel
P3: Basic PLC program for SINUMERIK 840D sl
13.10 Structure and functions of the basic program
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