VEGA VEGAFLEX 66 (-110…+400°C) Profibus PA - Manual (Page 55)

10.2 Profibus PA
Instrument master file
The instrument master file (GSD) contains the characteristic data of the Profibus PA
instrument. These data are, e.g. the permissible transmission rates as well as information
on diagnostics values and the format of the measured value outputted by the PA
instrument.
A bitmap file is also provided for the Profibus network planning tool. This file is installed
automatically when the GSD file is integrated. The bitmap file is used for symbolic
indication of the PA instrument in the configuration tool.
Ident number
Each Profibus instrument gets an unambiguous ident number (ID number) from the
Profibus user organisation (PNO). This ID number is also included in the name of the GSD
file. For VEGAFLEX 66 the ID number is 0 x 0771(hex) and the GSD file FX__0771.GSD.
Optionally to this manufacturer-specific GSD file, PNO provides also a general so-called
profile-specific GSD file. For VEGAFLEX 66 you have to use the general GSD file
PA139700.GSD. If the general GSD file is used, the sensor must be set to the profile-
specific ident number via the DTM software. By default, the sensor operates with the
manufacturer-specific ID number.
Cyclical data traffic
The master class 1 (e.g. PLC) cyclically reads out measured values from the sensor
during operation. The below block diagram below shows which data can be accessed by
the PLC.
VEGAFLEX 66 • Profibus PA 55
10 Supplement
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EN
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