The BMXNOR0200H and RTU protocol have a maximal number of events buffer size of 100,000.
NOTE: The BMXNOR0200H module supports the backup of up to 10,000 events into Flash memory on loss of power. Only the latest events are saved if the number of events is more than 10,000.
The event monitor component:
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saves up to 10,000 events into Flash memory on loss of power,
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reads events from the Flash memory when power is restored,
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saves only the latest events if the size of the saved events exceeds 10,000,
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can be configured to decide which events or data types need to be saved on loss of power.
Event backup is a configurable feature for users. It can be enabled or disabled on the Web site as shown in the picture below and it is disabled by default. This feature is set individually for each channel and each data type. Only the events of the main channel are saved on loss of power. After power restoration, the saved events can be restored into the main channel, and also the virtual channels, which depend on Event Restore Mode configuration in the Web site. These configurations take effect after a communication reset in the Web site or power recycle.
Configuration of event backup:
Event restore mode:
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Event backup enable: Specifies whether the channel (IEC or DNP3 server/slave) supports event backup if the module does not power up. It is only effective for the main channel.
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Event restore mode: It has two options, main channel and all channels. Select the main channel option if you want to add saved events into the event buffer of the main channel when power restores, ignoring the virtual channel. Select the option all channels if you want to add saved events into both the main channel and virtual channels when power restores.
Events Time Quality: When restoring backup events after power restoration, the time quality is forced to
NOTE: The box Event Backup Enable must be checked beforehand.
Configuration of event backup for DNP3:
Configuration of event backup for IEC 101 and IEC 104:
NOTE: When restoring events from the Flash into the event buffer after power restores, the BMXNOR0200H module sorts the events according to the timestamps of the events.
The RTU has different backup behaviors in different cases. The type of case is defined from the user point view:
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Case
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Event
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1
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Loss of power
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power lost
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Saves events in non volatile memory on loss of power
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2
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Power start
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power on/restore
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Restores events when the RTU protocol starts
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3
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Protocol exit
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Unity Pro Ethernet configuration resets RTU communication through Web site RTU protocol cold/warm restart.
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Does not save events when the protocol exits
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Signature authentication is required when events are restored from the Flash memory. It checks if the protocol configuration has changed during the power loss and restore. If the signature of the XML configuration is different from the record in the Flash, all the events are deleted directly.
NOTE: The signature changes if the parameters of the channel/session/sector or Network Type/IP/Port/Start Reg Addr/Connection Count have changed. The Modem/PPPoE/Serial Port/Time Zone do not have an effect on the signature.
If the events number to save exceeds the size of the Flash memory, the BMXNOR0200H module saves only the latest events.
