Siemens SIPROTEC 5 Manual page 486

Glossary
Tree view
The left area of the project window visualizes the names and symbols of all containers of a project in the form
of a hierarchical tree structure. This area is referred to as a tree view.
Trend recorder
Trend recorders are used for long-term recording and monitoring of the process of voltage change within
settable tolerance ranges. The flicker measurement can also be determined and stored in the trend recorder.
UDP
See User Datagram Protocol.
Unbuffered Report Control Block
Unbuffered Report Control Block (URCB) is a form of report controlling. Internal events trigger the immediate
sending of reports based on best effort. If no association exists or if the transport data flow is not fast
enough, events can be lost.
User Datagram Protocol (UDP)
UDP is a protocol. The protocol is based on IP as TCP. In contrast to this, however, UDP works without a
connection and does not have any safety mechanisms. The advantage of UDP in comparison to IP is the higher
transmission rate.
UTC
Universal Time Coordinated
Value Indication
Value indications are single-point indications in which a further value is transferred in addition to the actual
indication (example: Fault locator : Here, the distance to the fault location is also indicated in addition to the
fault statement Yes/No.)
Virtual Bay Device
A virtual bay device comprises all communication objects, as well as their properties and states, which a
communication user can utilize in the form of services.
Virtual Device
A VD (virtual device) comprises all communication objects, as well as their properties and states, which a
communication user can utilize in the form of services. A VD can be a physical device, a module of a device or
a software module.
486 SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017