Protection Events; Security Events; Platform Events - GE P642 Technical Manual

Chapter 13 - Monitoring and Control
The IED contains a separate register containing the latest maintenance records. This provides a convenient way of
viewing the latest maintenance records and saves searching through the event log. You access these fault records
using the Select Maint setting.
The maintenance record has a number of extra menu cells relating to the maintenance event. These parameters
are Maint Text, Maint Type and Maint Data. They contain details about the maintenance event selected with the
Select Maint cell.
2.1.6

PROTECTION EVENTS

The IED logs protection starts and trips as individual events. Protection events are special types of standard events.
The event type description shown in the Event Text cell for this type of event is dependent on the protection event
that occurred. Each time a protection event occurs, a DDB signal changes state. It is the name of this DDB signal
followed by 'ON' or 'OFF' that appears in the Event Text cell.
The Event Value cell for this type of event is a 32 bit binary string representing the state of the relevant DDB
signals. These binary strings can also be viewed in the COMMISSION TESTS column in the relevant DDB batch cells.
Not all DDB signals can generate an event. Those that can are listed in the RECORD CONTROL column. In this
column, you can set which DDBs generate events.
2.1.7

SECURITY EVENTS

An event record is generated each time a setting that requires an access level is executed.
The event type description shown in the Event Text cell displays the type of change.
2.1.8

PLATFORM EVENTS

Platform events are special types of standard events.
The event type description shown in the Event Text cell displays the type of change.
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