Siemens SIMATIC PCS 7 Function Manual page 67

Requirement
● Process control messages are created on the OS servers.
● Messages for Batch servers and Route Control servers are created on the dedicated
● No diagnostics area is present.
Structure for access to messages via the OPC A&E interface
The general mapping to the OPC A&E interface appears as follows:
OpenPCS 7
Function Manual, 05/2012, A5E02780178-02
message servers.
OpenPCS 7 interface
6.5 OPC Alarms and Events (OPC A&E)
67