Siemens DP/AS-Interface Link 20E, Руководство пользователя

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Glossary
157
DP/AS-Interface Link 20E
Release 11/2002
C79000-G8976-C138–04
PROFIBUS address
The PROFIBUS address is a unique identifier of a –> station connected to –>
PROFIBUS. The PROFIBUS address is transferred in the –> frame to address a
station.
PROFIBUS DP
DP mode complying with EN 50170, Vol 2.
SIMATIC NET
Siemens SIMATIC Network and Communication. Product name for –> networks
and network components from Siemens (previously SINEC).
SIMATIC NET PROFIBUS
SIMATIC NET bus system for industrial application based on PROFIBUS.
(previously SINEC L2).
SINEC
Previous product name for networks and network components from Siemens.
New name: SIMATIC NET.
SYNC mode
The SYNC mode is a DP mode in which one, more than one (group) or all –> DP
slaves transfer data to their process outputs at the same time. The time at which
the data is transferred is signaled by the SYNC command (a control frame for
synchronization).
Target rotation time
A –> bus parameter for –> PROFIBUS. The token gives a –> station on PROFI-
BUS the right to transmit frames. A station compares the token rotation time it
has measured with the target rotation time. The difference between the two times
decides whether only high or also low priority frames can be sent.
Token bus
Network access technique for bus access rights with more than one active sta-
tion (used in PROFIBUS). The token is passed on from active station to active
station. The following applies to each active station: The token passes through a
complete rotation between a station sending and receiving the token.