Opc server for ac 800M, Installation and Configuration
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- OPC Alarm and Event Server Behavior at Power Fail
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Buffer Queues There is a queue in the Alarm and Event Server for every connected Alarm and Event client (see Figure 12 ). All data that passes the OPC Server, for example event notifications and acknowledges will be queued. The maximum size of the queues can be configured through the configuration interface. The data in these queues is only held in the primary memory and is lost when the gateway shuts down or when a power failure occurs. It is possible to have a second OPC Server in parallel to increase the data security. Figure 12. Alarm buffer queues Connectivity OPC Client Connectivity Buffer queues Buffer queue Controller 1 Controller 2 OPC Server 1 OPC Server 2 Servers Servers OPC Alarm and Event Server Behavior at Power Fail Section 5 Alarm and Event 60 3BSE035983-510 Note The Alarm and Events Server has the following limitations. • Tracking-related events (events generated from operator interactions) are not supported. • The optional Quality information is not supported. • The optional SubConditions are not supported. That means that our conditions always only have one SubCondition (Single state conditions). • The optional Area concept from OPC alarm and event is not supported. OPC Alarm and Event Server Behavior at Power Fail If the power fails on the OPC Alarm and Event Server, all events received but not yet sent to respective OPC client, are lost. When the OPC Server has recovered from power fail, all alarms that are not in idle state is updated in the alarm handler. This means that recreation of alarm lists after power fail is done. As mentioned in previous paragraph, it is not possible to recreate condition related or simple events sent from controllers to the OPC Server before the power fail occurred. Section 5 Alarm and Event OPC Alarm and Event Clients 3BSE035983-510 61 tải về 0.83 Mb. Chia sẻ với bạn bè của bạn:
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