Siemens SIPROTEC 5 Manual page 479

case of HSR the message is sent twice in the 2 directions of the ring. The recipient receives it correspondingly
via 2 paths in the ring, takes the 1st message and discards the 2nd (see PRP).
IEC
See International Electrotechnical Commission
Input Data/Input Direction
Data is sent from the protocol slave to the protocol master.
International Electrotechnical Commission
See IEC.
Internet protocol
The Internet protocol (IP) enables the connection of participants which are positioned in different networks.
Inter-Range Instrumentation Group B
See IRIG B
IP
See Internet protocol
IRIG B
The IRIG time code is an abbreviation of Inter-Range Instrumentation Group time code and is a set of a group
of time codes used primarily in the military area for video recording, telemetry and other data recording
purposes. The Inter-Range Instrumentation Group (IRIG) is an organization of the United States Air Force
located at White Sands Missile Range and defines various standards for the testing of missiles, among other
purposes. The IRIG time code is divided into the following subgroups: IRIG A (1000 second pulses), IRIG B (100
second pulses), IRIG D (1 pulse per minute), IRIG E (10 second pulses), IRIG G (10 000 second pulses), IRIG H (1
second pulse). The subgroups are differentiated by the number of synchronization pulses per second, the data
formats and the modulation techniques used.
Link Address
The link address indicates the address of a SIPROTEC device.
Metered value
Metered values are a processing function, used to determine the total number of discrete similar events
(counter pulses), for example, as integral over a time span. In the power supply utility field, electrical energy is
often recorded as a metered value (energy import/delivery, energy transport).
Navigation window
Left area of the project window, which visualizes the names and symbols of all containers of a project in the
form of a hierarchical tree structure.
Object
Each element of a project structure is designated as an object in DIGSI 5.
Offline
If there is no communication connection between a PC program (for example, configuration program) and a
runtime application (for example, a PC application), the PC program is offline. The PC program executes in
Offline mode.
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
Glossary
479