Opc server for ac 800M, Installation and Configuration
Filtering of Event Notifications
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- Event category Vendor specific attributes
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Filtering of Event Notifications It is possible for OPC clients to filter out event notification based on event category. The OPC standard makes it possible to send vendor-specific information in event notifications. An event notification belongs to a certain event category. There are six event categories defined within the OPC Alarm and Event Server. The Process Simple Event and the Process Condition Event categories are used for simple events respective condition-related events generated from applications. The categories System Simple Event and System Condition Event are used for system simple events and system alarms. The OPC_SERVER_ERROR category is a simple event used to tell the OPC client about refresh. The last category, Process Data To Simple Event, is a simple event generated from an application containing extra user defined data. Table 12. Event categories defined in the OPC server Event category Vendor specific attributes Process Simple Event Class, SourceGUID Process Condition Event Class, SourceGUID, AutoDisabled System Simple Event Class, SourceGUID System Condition Event Class, SourceGUID, AutoDisabled OPC_SERVER_ERROR NeedsRefresh Process Data To Simple Event XMLData, EventCode, RecipePath, Class, SourceGUID Refreshing OPC Clients Section 5 Alarm and Event 64 3BSE035983-510 The vendor specific attributes are: • Class – Used to group alarms of the process • SourceGUID – An unique identifier given to each source to make it easier for the OPC client to identify the source of an alarm • AutoDisabled – An attribute that indicates if an alarm is in the AutoDisabled state • NeedsRefresh – Information to the OPC client from the OPC server telling that it is time for refresh • XMLData – String containing user defined data • EventCode – Determines batch event type • RecipePath – Path to recipe tải về 0.83 Mb. Chia sẻ với bạn bè của bạn:
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