IED

An Intelligent Electronic Device (IED) is any device that includes one or more processors with the ability to receive data from, or send data to control, an external source. For example, electronic multifunction meters, digital relays, controllers and so on.

The intelligent electronic device (IED) is divided into:

• Logical Devices (LD)

• Logical Nodes (LN)

• Data Objects (DO)

• Data Attributes (DA)

Where a Logic Node is a composite of data objects, data sets and Report Control blocks.

Internal events such as process values, resulting trigger values for the event, time stamp, and quality information are the basis for triggering the report and log. The information consists of groups of data sets, which contain data and data attribute references.

Reports and logs help in time-critical and event-driven information exchange requirements. The Report Control Block provides the ability to transfer data values from Logical Nodes to a client transmission data value under defined conditions. For more information about reports, see Report Control Block (RCB).