ABB LVS Digital Manual page 12

T ERM IN OLOGY
RS232
RS485
RTC
SNTP
TCP/IP
4
PROFIBUS-DP
PROFIBUS-DP/V1
PROFIBUS-DP/V2
Real Time Clock
Software Local
Simple Network Time
Protocol
Switchgear Bus
Network
Transmission Control
Protocol / Internet
Protocol
Trip
Fieldbus communication protocol with cyclic data
transfer (V0).
Fieldbus communication protocol, extension of
PROFIBUS- DP allowing acyclic data transfer and
multi master (V1).
Fieldbus communication protocol, extension of
PROFIBUS- DP allowing time stamp and communi-
cation between master and slave (V2).
Standard No. 232 for PC communication, estab-
lished by EIA (Electronics Industries Association,
USA)
Communication interface standard from EIA (Elec-
tronics Industries Association, USA), operating on
voltages between 0V and +5V. RS-485 is more
noise resistant than RS-232C, handles data trans-
mission over longer distances, and can drive more
receivers.
Integrated clock function in devices used to gen-
erate time and date information if a remote clock
system is not present
A Control Access term describing that the UMC
accepts its commands from the hardwired inputs
as a result of either the PCS or MView passing the
Control Access Authority to Soft-Local.
Note: Does not require the hardwired local input
to be set to true.
A protocol used for time synchronization in Con-
trol Network through Ethernet
Term used to describe the internal switchgear
communication network, between Digital Gate-
way and UMC
TCP/IP is a high-level connection oriented, relia-
ble, full duplex communication protocol devel-
oped for integration of the heterogeneous sys-
tems.
A consequence of an alarm activated or an exter-
nal trip command from another device to stop the
motor or trip the circuit breaker.
G ENER A L
1 TG C90 80 04