10
PROFIBUS interface
All PROFIBUS users are connected in a bus structure (line), which can consist of several
segments. Up to 32 subscribers can be interconnected as masters or slaves in one
segment.
The bus is terminated by a terminator at the beginning and end of each segment.
For more than 32 users, repeaters (power amplifiers) have to be used to connect the
individual bus segments.
The maximum line length depends on the transmission speed. The device supports the
following transmission speeds.
Table 24: Length of cable as a function of the transmission rate
Baud rate [Bit/s]
9.6 k
19.2 k
45.45 k
93.75 k
187.5 k
Length of cable [m] / seg‐
ment
1200
1200
1200
1200
600
Baud rate [Bit/s]
500 k
1.5 M
3 M
6 M
12 M
Length of cable [m] / seg‐
ment
200
200
100
100
100
The use of repeaters means longer lines than in the table are possible. We recommend
connecting a maximum of 3 repeaters in series.
NOTE
The device is a DP-V0 slave and supports the
Auto Baud Detection
function. With this
function, the device is set to the baud rate specified by the PROFIBUS DP master.
10.1
Device project planning
The device is integrated into the control project with the help of the controller-specific
project planning tool (e.g., SIEMENS TIA Portal) using the generic station description
file (GSD). Project planning includes configuring the device (e.g., selecting the device
hardware and GSD modules for process and parameter data) as well as parameteriz‐
ing the device (e.g., selecting the resolution of the distance value output, measuring
direction...). After downloading the project planning details to the controller, all device
parameters are stored there.
When the device is replaced, this makes it possible to transmit all device parameters
from the controller to the new device (exception: PROFIBUS address).
Parameters set via the display or SOPAS ET are generally overwritten with the param‐
eters defined in the project planning tool. They are lost as soon as the device is
integrated in an PROFIBUS network and cyclical data exchange starts.
10.1.1
Generic station description (GSD) file
A generic station description (GSD) file contains a description of the properties of a
PROFIBUS device, e.g., the functions supported by the device or the digital information
the PLC receives from the device and the format of this information. It defines mod‐
ules which can be used to flexibly adapt different control tasks
and
see "Module description", page 59
Bitmap files are also GSD files. The status of the PROFIBUS device is visualized using
these files. The GSD file as well as the respective bitmaps are needed to configure
a PROFIBUS network. Every device receives an ID number from the PROFIBUS and
PROFINET user organization (PI).
PROFIBUS INTERFACE
10
8014755/19H8/2021-10-15 | SICK
O P E R A T I N G I N S T R U C T I O N S | DL100 Pro PROFIBUS DP
53
Subject to change without notice