CPU 1516pro-2 PN (6ES7516-2PN00-0AB0)
46 Operating Instructions, 09/2016, A5E35873416-AA
Basics of program execution
Events and OBs
Response to triggers
The occurrence of a trigger results in the following reaction:
● If the event comes from an event source to which you have assigned an OB, this event
triggers the execution of the assigned OB. The event enters the queue according to its
priority.
● If the event comes from an event source to which you have not assigned an OB, the
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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