VEGA VEGASON 66 Profibus PA - Manual (Page 52)

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 planning tool of the Profibus network. This file is
automatically installed with the GSD file. 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 66 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 66 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.
Supplement
52 VEGASON 66 - Profibus PA
28789
-EN
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