Siemens SIMATIC PCS 7 Function Manual page 68

OpenPCS 7 interface
6.5 OPC Alarms and Events (OPC A&E)
Example of a hierarchy without assignment
The following picture shows the hierarchy of messages in a browser that can be sent to the
client as a "conditional event".
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Function Manual, 05/2012, A5E02780178-02
OpenPCS 7