Ecolab Versatronic Profibus Instructions De Configuration page 59

4 Configuringa PROFIBUS-DP-System
4.1 The GSD file
Device data (GSD) allow open project design.
PROFIBUS-DP devices have different performance features.
They differ with respect to the available functionality (e. g. number of I/O signals,
diagnostic messages) or the possible bus parameters, such as baud rate and time
monitoring.
These parameters vary individually for each device type and manufacturer.
To provide simple plug & play configuration for PROFIBUS-DP, the characteristic device
features are defined in the form of an electronic data sheet device database file
(ddf = GSD file). The standardized GSD files expand open communication up to the
operator level. Simple and user friendly integration of devices from different manufacturers
in a bus system is possible by means of the project design tool, which is based on the
GSD files. The GSD files provide clear and comprehensive description of the features
of a device type in a precisely defined format. GSD files are produced for the specific
application.
The defined file format permits the project design system simply to read in the device data
of any PROFIBUS-DP device and automatically use this information for the bus system
configuration.
As early as the project design phase, the project design system can automatically perform
checks for input errors and the consistency of data entered in relation to the overall
system.
The GSD files are subdivided into three sections.
General specifications
n
This section contains, among other items, information on manufacturer and device
names, hardware and software release versions, and the supported baud rates
DP master-referenced specifications
n
This section is used to enter all parameters related solely to DP master devices,
e. g. the maximum number of DP slaves that can be connected, or upload and
download options; this section is not available for slave devices
DP slave-referenced specifications
n
This section contains all slave-related information, e. g. the number and type of I/O
channels, specifications for diagnostic texts and information on the consistency of I/O
data.
The GSD file includes not only lists, such as information on the baud rate supported
by the device, but also the possibility of describing the modules available in a modular
device.
Configuringa PROFIBUS-DP-System
23 417102396 Rev. 2-08.2023