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 recorded upon a loss of power or a module hot-swap.

These are the storage capacities for events in flash memory for the BMENOR2200H module and the RTU protocol:

  • The module records up to 10,000 events into Flash memory upon a loss of power.

  • The module records only the latest events when number of recorded events exceeds 10,000.

  • The module reads events from Flash memory when power is restored.

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

Records 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 record events when the protocol exits.

Event Buffer Capacity in RAM

The number of events in the buffer observes these limitations:

  • The module records up to 150,000 event in the event buffer.

  • The event buffer is synchronized between the primary and standby modules in a redundant system.

  • The module records up to 10,000 security events per server channel in the event buffer.

Retain or Clear the RAM

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 Clear Events 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.

  • Change the DNP3 cyber security configuration on the web page to clear the buffer.

  • A SCADA command specifically clears the buffer.

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 records only the latest events.

  • Hot Standby systems does not support the event backup feature.