Technical data

Glossary
Introduction to PROFIBUS on Industrial PC
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C79000-G8976-C068
The node table applies to all -> networks within a -> system. Each
entry in the node table describes the interface between a
programmable logic controller (or any other station) and a -> subnet.
The entries in the subnet are used by the system to locate and
establish connections between stations.
The length of the reserved area at the beginning of a data buffer of the
FDL programming interface.
The process image is a special memory area in the programmable
logic controller. At the start of the cyclic program, the signal states of
the input modules are transferred to the process image of the inputs. At
the end of the cyclic program, the process image of the outputs is
transferred to the output modules.
SIMATIC NET bus system for industrial applications based on
PROFIBUS.
A fieldbus complying with EN 50 170.
The PROFIBUS address is a unique identifier for a -> station
connected to -> PROFIBUS (PROFIBUS). The PROFIBUS address is
transferred in the -> frame to address a -> station.
PROFIBUS distributed I/Os. Transmission services complying with
PROFIBUS EN 50 170.
A -> station with master functions in -> PROFIBUS DP.
PROFIBUS Fieldbus Message Specification. Upper sublayer of layer 7
of the ISO/OSI reference model for PROFIBUS.
PROFIBUS PA is a recommendation of the PROFIBUS users'
organization extending PROFIBUS EN 50 170 to include aspects of
intrinsic safety.
A set of rules governing data transmission. Using these rules, both the
formats of the messages and the data flow during transmission can be
specified.
All the -> masters on -> PROFIBUS form a logical token ring. Within
this token ring, the token is passed on from station to station. If the
transmission of the token is incorrect or if a master is removed from
the ring, this leads to an error when the token is passed on (the token is
not accepted by this station) and the station is excluded from the ring.
Node table
Offset
Process image
PROFIBUS
PROFIBUS
address
PROFIBUS DP
PROFIBUS DP
master
PROFIBUS FMS
PROFIBUS PA
Protocol
Reorganization
token ring