Table of Contents
Advertisement
Glossary
The uses of PROFIBUS range from production and process automation to building
automation.
Protocol
A protocol is a set of rules for controlled transfer of data. Protocols, for example, specify the
data structure, the structure of data packets and the coding. Protocols can also specify a
control mechanisms and hardware and software requirements.
Requested message
Polled messages are data messages of a station or node TIM with a special identifier
indicating that they were sent in response to a general request from the master station.
RJ-12
This describes a 6-pin connecting cable with a standardized modular (Western) connector.
RJ-45
This describes a 8-pin connecting cable with a standardized modular (Western) connector.
RS-232
RS-232 is a standard for serial (i.e. bit-by bit) data transmission with +12 V and -12 V
signals. RS-232 is a Recommended Standard of the Electronic Industries Association. For
the RS-232 interface, 9-pin and 25-pin connections with D-sub connectors are normal.
These are sub-miniature connectors with a D-shaped face.
RS-485
RS-485 is a standard for data transmission with 5 V differential signals. The RS-485
interface uses only one pair of wires and is operated in half duplex. The connection is
multipoint-compliant; in other words, up to 32 subscribers can be connected.
RTS
Request to send
Signal in the data flow control
Send buffer
Image memory / send buffer
→
284
SINAUT ST7 station control system
System Manual, 09/2016, C79000-G8976-C178-10
Advertisement
Table of Contents
