Plc User Program - Siemens SINUMERIK 840DiE sl Manual

01/2007
6.4.2

PLC user program

6.5 Creating a PROFIBUS configuration
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
The PLC user program according to its definition contains all functions required
to process user–specific automation tasks. Tasks of the PLC user program in-
clude:
– Defining the conditions for a restart (warm restart) and PLC restart.
– Processing process data, for example, combining signals, reading in and
evaluating analog values, defining signals for output and outputting ana-
log values.
– Responding to alarms
– Processing faults in normal program execution
The basis of the PLC user program is the PLC basic program already included
in the S7 project. Now expand and alter the PLC basic program to suit your au-
tomation task.
Creation of a PROFIBUS configuration is described in a separate section. See
Section 8, Page 8-175.
6 PLC Commissioning
6.5 Creating a PROFIBUS configuration
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