VEGA VEGASON 64 Profibus PA - Manual (Page 54)

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 VEGASON 64
the ID number is 0x0770(hex) and the GSD file "SN__0770.GSD". As an option to this
manufacturer-specific GSD file, PNO provides also a general so-called profile-specific GSD file. For
VEGASON
64 you have to use the general GSD file "PA139701.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.
Note:
When using the profile-specific GSD file, the PA-OUT value as well as
the temperature value are transmitted to the PLC (see block diagram
"
Cyclical data traffic").
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.
54 VEGASON 64 • Profibus PA
10 Supplement
28787
-EN
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