USART
Universal Synchronous/Asynchronous Receiver/Transmitter
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
Vendor ID
Manufacturer-specific part of the device identification for PROFINET.
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.
WYE
Phase-to-ground related measurements of a 3-phase system
Glossary
SIPROTEC 5, Overcurrent Protection, Manual 1633
C53000-G5040-C017-8, Edition 07.2017
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