Table of Contents
Advertisement
Glossary
image. The current process state can also be sampled after a data loss by means of
a GI.
GPS
Global Positioning System. Satellites with atomic clocks on board orbit the earth twice
a day in different parts in approx. 20,000 km. They transmit signals which also contain
the GPS universal time. The GPS receiver determines its own position from the
signals received. From its position it can derive the running time of a satellite and thus
correct the transmitted GPS universal time.
Hierarchy level
Within a structure with higher-level and lower-level objects a hierarchy level is a con-
tainer of equivalent objects.
HV field description
The HV project description file contains details of fields which exist in a ModPara-
project. The actual field information of each field is memorized in a HV field description
file. Within the HV project description file, each field is allocated such a HV field de-
scription file by a reference to the file name.
HV project descrip-
All the data is exported once the configuration and parameterisation of PCUs and sub-
tion
modules using ModPara has been completed. This data is split up into several files.
One file contains details about the fundamental project structure. This also includes,
for example, information detailing which fields exist in this project. This file is called a
HV project description file.
Internal double point indication → Double-point indication
ID
Internal double point indication intermediate position 00, → Double-point indication
ID_S
IEC
International Electrotechnical Commission
IEC address
Within an IEC bus a unique IEC address has to be assigned to each SIPROTEC 4
device. A total of 254 IEC addresses are available for each IEC bus.
IEC communication
Within an IEC communication branch the users communicate on the basis of the
branch
IEC60-870-5-103 protocol via an IEC bus.
Initialization string
An initialization string comprises a range of modem-specific commands. These are
transmitted to the modem within the framework of modem initialization. The com-
mands can, for example, force specific settings for the modem.
Inter relay commu-
nication
IRC combination
Inter Relay Communication, IRC, is used for directly exchanging process information
between SIPROTEC 4 devices. You require an object of type IRC combination to con-
figure an Inter Relay Communication. Each user of the combination and all the neces-
sary communication parameters are defined in this object. The type and scope of the
information exchanged among the users is also stored in this object.
IRIG-B
Time signal code of the Inter-Range Instrumentation Group
416
→ IRC combination
7UM61 Manual
C53000-G1176-C127-3
Advertisement
Table of Contents
