VEGA VEGABAR 55 Profibus PA - climate compensated - Manual (Page 54)

54
10 Supplement
VEGABAR 55 • Profibus PA - climate compensated
39442-EN-130321
Electrical protective measures
Protection rating
Ʋ Housing, standard IP 66/IP 67 15)
Ʋ Aluminium and stainless housing
(optionally available)
IP 68 (1 bar) 16)
Ʋ Process component in IP 68 version IP 68 (25 bar)
Ʋ External housing IP 65, IP 66/IP 68 (0.2 bar)
Overvoltage category III
Protection class II
Approvals
Instruments with approvals can have different technical data depending on the version.
For that reason the associated approval documents of these instruments have to be carefully
noted. They are part of the delivery or can be downloaded under www.vega.com via "VEGA Tools"
and "serial number search" as well as via "Downloads" and "Approvals".
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 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.
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 55
the ID number is 0 x 076F(hex) and the GSD file BR__076F.GSD. As an option to this manufactur-
er-specific GSD file, PNO provides also a general so-called profile-specific GSD file. For VEGABAR
55 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 oper-
ates 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 opera-
tion. The below block diagram below shows which data can be accessed by the PLC.
15) Instruments with gauge pressure measuring ranges cannot detect the ambient pressure when submerged, e.g.
in water. This can lead to falsification of the measured value.
16) Only with instruments with absolute pressure ranges.