Information On Profibus Pa - Vega VEGABAR 53 Operating Instructions Manual

Supplement
10.2 Information on Profibus PA
Instrument master file
The instrument master file (GDS) 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
VEGABAR 53 the ID number is 0x076F(hex) and the GSD file BR__076F.GSD. As an option
to this manufacturer-specific GSD file, PNO provides also a general so-called profile-specific
GSD file. For VEGABAR 53 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.
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.
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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").
VEGABAR 53 - Profibus PA