Glossary
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
406
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 commands can, for example, force specific settings for the
modem.
Inter relay communication
→ IRC combination
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 configure an Inter Relay Communication. Each user
of the combination and all the necessary 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
IS
Internal single-point indication → Single-point indication
IS_F
Internal indication fleeting → Fleeting indication, → Single-point indication
ISO 9001
The ISO 9000 ff range of standards defines measures used to ensure the quality of a product from the devel-
opment to the manufacturing.
LFO filter
(Low Frequency Oscillation) Filter for low-frequency oscillation
Link address
The link address gives the address of a V3/V2 device.
List view
The right pane of the project window displays the names and icons of objects which represent the contents of
a container selected in the tree view. Because they are displayed in the form of a list, this area is called the list
view.
LV
Limit value
LVU
Limit value, user-defined
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