configured IED description: The SCL file that describes the communication-related part of an instantiated IED within a project. The communication section contains the address of the IED. The substation section related to this IED may be present and, if so, contains project-specific assigned name values.

instantiated data attribute: A single data attribute that has been assigned an initial value by the Modicon IEC 61850 Configuration Tool, thereby instantiating both the data attribute and its parent data object (DO).

A collection of data attributes and data objects that can be viewed and transmitted together. Although data sets are related to logical nodes, the member data attributes can originate in different logical nodes and logical devices. Data sets are used to define data collections that form the basis for reporting and logging using buffered report control blocks, unbuffered report control blocks, and GOOSE control blocks.

derived data type: A derived data type is a set of elements with the same type (ARRAY) or with different types (structure).

instantiated data object: A single data object with one or more data attributes (DAs) that have been assigned an initial value by the Modicon IEC 61850 Configuration Tool.

(dual-ring switch) A ConneXium extended managed switch that has been configured to operate on an Ethernet network. Predefined configuration files are provided by Schneider Electric to downloaded to a DRS to support the special features of the main ring / sub-ring architecture.

(elementary function) This is a block used in a program which performs a predefined logical function.

A function does not have any information on the internal state. Several calls to the same function using the same input parameters will return the same output values. You will find information on the graphic form of the function call in the [functional block (instance)]. Unlike a call to a function block, function calls include only an output which is not named and whose name is identical to that of the function. In FBD, each call is indicated by a unique [number] via the graphic block. This number is managed automatically and cannot be modified.

Position and configure these functions in your program to execute your application.

You can also develop other functions using the SDKC development kit.

encoder, receiver, transmitter: ERT is a wireless protocol used to automatically read and transmit data from utility meters over a short range so utility personnel need not physically enter a premises and manually take readings from each meter.

A 10 Mb/s, 100 Mb/s, or 1 Gb/s, CSMA/CD, frame-based LAN that can run over copper twisted pair or fiber optic cable, or wireless. The IEEE standard 802.3 defines the rules for configuring a wired Ethernet network; the IEEE standard 802.11 defines the rules for configuring a wireless Ethernet network. Common forms include 10BASE-T, 100BASE-TX, and 1000BASE-T, which can utilize category 5e copper twisted pair cables and RJ45 modular connectors.

TCP/IP-based messaging for Modbus TCP . It is used for point-to-point, client/server messages that include both data (typically unscheduled information between a client and a server) and routing information.

(file transfer protocol) A protocol that copies a file from one host to another over a TCP/IP-based network, such as the internet. FTP uses a client-server architecture as well as separate control and data connections between the client and server.

generic object-oriented substation event: A control model defined by the IEC 61850 protocol that provides a mechanism for the transfer of event data relating to module status and value settings. GOOSE is a sub-set of the GSE model. As implemented in the Ethernet communication module, GOOSE is used to publish and subscribe to event data in the form of VLAN transmissions.

IED capability description: A mandatory SCL file used to exchange data from the IED configurator to the system configurator. This file describes the functional and engineering capabilities of an IED type. It contains exactly one IED section for the IED type whose capabilities are described. The IED name shall be TEMPLATE.

intelligent electronic device: An IEC 61850 protocol compliant, microprocessor based industrial device incorporating one or more processors with the capability of receiving or sending data/controls from or to an external source (for example, electronic multifunction meters, digital relays, controllers).

instantiated IED description: An SCL file that contains the configuration data for a single IED in an application. This file must contain the instantiated device description, communication settings, and data type templates. The file may optionally contain a description of LNs bound to the substation object.

(internet protocol security) An open set of protocol standards that make IP communication sessions private and secure for traffic between modules using IPsec, developed by the internet engineering task force (IETF). The IPsec authentication and encryption algorithms require user-defined cryptographic keys that process each communications packet in an IPsec session.

logical device: A collection of a group of functions. Each function is defined as a logical node. A physical device can include one or more LDs. The IEC 61850 server includes a root LD named System.

logical node: A specific function of a logical device (LD), defined by a collection of data objects (DOs).

(Modbus over TCP protocol) This is a Modbus variant used for communications over TCP/IP networks.

(rapid spanning tree protocol) A protocol that allows a network design to include spare (redundant) links to provide automatic backup paths if an active link stops working, without the need for loops or manual enabling/disabling of backup links.

substation configuration description file: An SCL file containing a detailed description of an entire substation design. It must include sections describing the substation, communication, IED, and data type template. A single SCD file comprises multiple SSD and ICD files.

system configuration description language: An XML based language that allows a formal description of power utility automation systems, the devices and the relation between them, and the IED configuration.

(simple network management protocol) Protocol used in network management systems to monitor network-attached devices for events. The protocol is part of the internet protocol suite (IP) as defined by the internet engineering task force (IETF), which consists of network management guidelines, including an application layer protocol, a database schema, and a set of data objects.

(simple network time protocol) See NTP.