Event Backup

Introduction

The BMENOR2200H module’s event backup buffer can store events when power to the module stops.

Event Backup Characteristics

You can configure the module for the events or data types that are saved upon a loss of power or a module hot-swap.

These are the capacities for event storage for the BMENOR2200H module and the RTU protocol:

event buffer:
- The module saves up to 150,000 event in the event buffer.
- The module saves up to 10,000 events in the event buffer upon a loss of power.
- The module saves up to 10,000 security events per server channel in the event buffer.
flash memory:
- The module saves up to 10,000 events into Flash memory upon a loss of power.
- The module saves only the latest events when number of saved events exceeds 10,000.
- The module reads events from Flash memory when power is restored.

NOTE: You can enable or disable the exchange of unsolicited messaging data.

Retain or Clear the Buffer

The event buffer in RAM is retained in these situations:

The CPU experiences a warm start.
There is a network swap in a dual-network application.

The event buffer in RAM is cleared in these situations:

Use a SCADA command to clear the buffer in RAM.
The CPU experiences a cold restart (such as during the download of a new configuration) or you press the reset button on the power supply. All communications are reset.
The CPU experiences a cold restart (such as during the download of a new configuration), and communications are reset.
Change the DNP3 cyber security configuration on the web page to clear the buffer.
A SCADA command specifically clears the buffer.

Event Backup Behavior

The BMENOR2200H module has different backup behaviors in different cases. The type of case is defined from the user point view:

	Case	Description	Event
1	Loss of power	power lost	Saves events in non-volatile memory on loss of power.
2	Power start	power on/restore	Restores events when the RTU protocol starts.
3	Protocol restart	These actions clear the module event buffer: The RTU protocol configuration changes. The RTU receives a warm or cold start command from an RTU client.	Does not save events when the protocol exits.

Limitations

The BMENOR2200H module scans and stores events in each channel one by one when the number of events exceeds the Flash memory capacity, the module saves only the latest events.