Basics Of Program Processing; Events And Obs - Siemens SIMATIC S7-1500 Automation System System Manual

Basics of program processing

13.1

Events and OBs

OB start events
The occurrence of an OB start event results in the following reaction:
● If the event comes from an event source to which you have assigned an OB, this event
● If the event comes from an event source to which you have not assigned an OB, the
S7-1500 Automation System
System Manual, 01/2013, A5E03461182-01
triggers the execution of the assigned OB. This means that the event is positioned in a
queue that corresponds to its priority.
default system reaction is executed.
Note
Some event sources, such as startup, pull/plug, exist even if you do not configure them.
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