Glossary
Communication
434
Function Manual, 05/2021, A5E03735815-AJ
Modbus RTU
R
emote
T
erminal
U
nit; Open communications protocol for serial interfaces based on a
master/slave architecture.
Modbus TCP
T
ransmission
C
ontrol
P
rotocol; Open communications protocol for Ethernet based on a
master/slave architecture. The data are transmitted as TCP/IP packets.
Network
A network consists of one or more interconnected subnets with any number of devices.
Several networks can exist alongside each other.
NTP
The
N
etwork
T
ime
P
rotocol (NTP) is a standard for synchronizing clocks in automation
systems via Industrial Ethernet. NTP uses the connectionless UDP transport protocol for the
Internet.
OPC UA
OPC
U
nified
Automation
is a protocol for communication between machines, developed by
the OPC Foundation.
Operating states
Operating states describe the behavior of a single CPU at a specific time.
The CPUs of the SIMATIC standard systems have the STOP, STARTUP and RUN operating
states.
The primary CPU of the redundant system S7-1500R/H has the operating states STOP,
STARTUP, RUN, RUN-Syncup and RUN-Redundant. The backup CPU has the operating states
STOP, SYNCUP and RUN-Redundant.
Operating system
Software that allows the use and operation of a computer. The operating system manages
resources such as memory, input and output devices and controls the execution of programs.
PG
PNO
Содержание SIMATIC ET 200AL
Страница 2: ......
Страница 143: ......
Страница 218: ......
Страница 250: ......
Страница 296: ......
Страница 337: ......
Страница 365: ......
Страница 392: ......
Страница 419: ......
Страница 451: ......
Страница 483: ......
Страница 597: ......
Страница 648: ......
Страница 702: ......
Страница 739: ......
Страница 781: ......
Страница 804: ......
Страница 828: ......
Страница 853: ......
Страница 880: ......
Страница 906: ......
Страница 996: ...Diagnostics ...
Страница 1121: ......
Страница 1565: ......