Information On The Gsd Conversion - Pepperl+Fuchs HD2-GTR-4PA Manual

P R O F I B U S P
O W E R
5.2.1

Information on the GSD Conversion

Because coupling is transparent, PROFIBUS PA nodes are treated like
PROFIBUS DP slaves by the PROFIBUS DP Master. This also applies
to start-up and configuration.
The GSD file must be integrated in a configuration tool before it can be
used to configure and operate a PROFIBUS PA slave.
The following distinctions are important to recognize in GSD files for
PROFIBUS PA slaves:
• Is the file a profile GSD or a manufacturer-specific GSD?
• is the GSD designed for communication via the RS 485 inter-
face (DP-GSD) or by the interface in conformity with
IEC 61158-2 (PA-GSD)?
If a profile GSD is being used, the filename indicates whether it is a DP-
GSD or a PA-GSD. For example, file PA039733.gsd is the profile GSD
for 4 binary outputs. The "PA" in the filename means it is a PROFIBUS
PA slave. The following "0" indicates it is a DP-GSD. The filename of the
PA-GSD for the same profile is PA139733. The "1" after the PA abbre-
viation identifies it as a PA-GSD.
If manufacturer-specific GSDs are used, for example to make use of
functionality that falls outside the profile, the following convention iden-
tifies whether it is a DP-GSD or PA-GSD:
• If you have not done so already, integrate the GSD into your
configuration tool.
• Check in your configuration tool what baud rates are supported.
If a baudrate of 31.25 kBd is supported, the file is a PA-GSD. Normally
only baudrates of 31.25 kBd, 45.45 kBd and 93.75 kBd are supported
by the PA-GSD.
If transmission rates in accordance with the PROFIBUS specification
are used (IEC 61158), i.e. baudrates of 9.6 kBd to 1.5 MBd or 12 MBd,
the file is a DP-GSD. Some PROFIBUS PA field device manufacturers
do not offer any PROFIBUS DP-GSDs. In this case the existing PROFI-
BUS PA-GSD must be converted. The conversion software (GSD con-
verter) is available at no cost from www.pepperl-fuchs.com. The purpo-
se of this conversion software is exclusively to enter missing
transmission rates and to set specific bus parameters to values that al-
low for problem-free operation of the PROFIBUS DP.
Converting the GSD file imposes the following functional restrictions if
that was previously supported by the original GSD file:
• FREEZE and SYNC functionality is deactivated. These
functions are used in PROFIBUS DP for synchronization of sen-
sors/actuators. Since work is possible on the PROFIBUS DP
Subject to reasonable modifications due to technical advances.
Pepperl+Fuchs Group • Tel.: Germany +49 621 776-0 • USA +1 330 4253555 • Singapore +65 67799091 • Internet http://www.pepperl-fuchs.com
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