User Manual 08/2003 Edition

4
4 Communications via PROFIBUS DP 02.99
4.4 Settings at the PROFIBUS DP master
4.4 Settings at the PROFIBUS DP master
4.4.1 General information on the DP master
Performance
features of
PROFIBUS devices
What is a
master device file
(GSD file)?
GSD file for ”DP
slave POSMO A”
Data transfer
consistent/
inconsistent
4-120
PROFIBUS devices have different performance features.
The characteristic features of the slaves are summarized in a master
device file (GSD) so that all of the master systems can correctly
address the DP slave.
The features for the various master systems are summarized in a
standardized master device file (GSD).
A master device (GSD file) describes the features of a DP slave in a
precisely defined, uniform format in accordance with EN 50 170,
Volume 2, PROFIBUS.
GSD files are saved in the directory ”\GSD”.
The associated bitmaps are saved in the directory ”\Bitmaps”.
The master device file (GSD) for the ”DP slave POSMO A” is available
as ASCII file as follows:
File name: SIEM8054.GSD
Where is the GSD file for the ”DP slave POSMO A”?
From your local Siemens office (sales partner)
or
via the Internet http://www.profibus.com/gsd/
The PKW must be consistently transferred.
Consistent data include input/output data areas, which from the contents,
contain closed information which cannot be accommodated using
a byte, word or double–word structure.
For consistent data transfer, you require the SFC 14 and SFC 15
blocks in SIMATIC S7.
Siemens AG 2003 All rights reserved
SIMODRIVE POSMO A User Manual (POS1) – 08.03 Edition