VEGA VEGAFLEX 66 (-200…+400°C) Profibus PA - Manual (Page 58)

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.
m(d) % Lin%
Min-Max
adjustment
Linearization
PROFIBUS PA-output
Primary
Value
Secondary
Value 2
Secondary
Value 1
Target
Mode
Failure
mode
Alarms Scaling
Source for
scaling
t
i
Integration
Sensor
characteristics
PA-Out
TB
FB
Select additional cyclic
value
Fig. 31: VEGAFLEX 66: Block diagram with AI (PA-OUT) value and additional cyclical value
TB Transducer Block
FB
Function Block
58 VEGAFLEX 66 • Profibus PA
10 Supplement
34175
-EN
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