Example 1: Messages Are Not Assigned To Any Area - Siemens SIMATIC PCS 7 Function Manual

OpenPCS 7 interface
6.5 OPC Alarms and Events (OPC A&E)
Recommendation
Use an OPC A&E server with hierarchical access when creating new projects. If you upgrade
an existing project, the OPC A&E server can be used as before or the OPC A&E server can
be converted to hierarchical access. The conversion can be undone again without any loss of
data.
6.5.9.2

Example 1: Messages are not assigned to any area

Introduction
Process control messages, messages for Batch servers and Route Control servers are not
assigned to an area or group. For these messages, no designated area is assigned in the
structure of the OPC A&E access.
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OpenPCS 7