VEGA WEIGHTRAC 31 Profibus PA - Manual (Page 70)

70
10 Supplement
WEIGHTRAC 31 • Profibus PA
43837-EN-131119
10.2 Communication 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 automati-
cally when the GSD file is integrated. The bitmap file is used for symbolic indication of the PA instru-
ment in the configuration tool.
ID 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. Optionally to this
manufacturer-specific GSD file, PNO provides also a general so-called profile-specific GSD file. 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. When using the
instruments on a segment coupler SK-2 or SK-3, no special GSD files are required.
The following table shows the instrument ID and the GSD names for the PROTRAC sensor series.
Device name Instrument ID GSD file name
VEGA Instrument class in
profile 3.02
VEGA Profile-specific
MINITRAC 31 0xCF5 0x9702 VE010CF5.GSD PA139702.GSD
FIBERTRAC 31 0xCF2 0x9702 VE010CF2.GSD PA139702.GSD
SOLITRAC 31 0xCF4 0x9702 VE010CF4.GSD PA139702.GSD
POINTRAC 31 0xD48 0x9702 VE010D48.GSD PA139702.GSD
WEIGHTRAC 31 0xCF8 0x9702 VE010CF8.GSD PA139702.GSD
Cyclical data traffic
The master class 1 (e.g. PLC) cyclically reads out measured values from the sensor during opera-
tion. The below block diagram below shows which data can be accessed by the PLC.