VEGA VEGABAR 65 Profibus PA - Manual (Page 61)

10 .2 Information on 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 VEGABAR 65
the ID number is 0 x 076F(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 65
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.
bar % Lin%
Min-Max
adjustment Linearization
PROFIBUS PA-output
Primary
Value
Secondary
Value 1
Secondary
Value 2
Target
Mode
Failure
mode
Alarms Scaling
Source for
scaling
t
i
Damping
Sensor
characteristics
PA-Out
TB
FB
Select additional cyclic
value
Sensor mounting
correction
Fig. 29: VEGABAR 65: Block diagram with AI (PA-OUT) value and Additional Cyclic Value
VEGABAR 65 • Profibus PA 61
10 Supplement
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EN
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