5610 SupplementVEGAPULS 61 • Profibus PA28444-EN-141215For that reason the associated approval documents of these instruments have to be carefullynoted. They are part of the delivery or can be downloaded under www.vega.com via "VEGA Tools"and "Instrument search" as well as via "Downloads" and "Approvals".10.2 Profibus PAInstrument master fileThe 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 valuesand 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 numberEach Profibus instrument gets an unambiguous ident number (ID number) from the Profibus userorganisation (PNO). This ID number is also included in the name of the GSD file. For VEGAPULS 61the ID number is 0 x 0772(hex) and the GSD file PS__0772.GSD. Optionally to this manufacturer-specific GSD file, PNO provides also a general so-called profile-specific GSD file. For VEGAPULS61 you have to use the general GSD file PA139700.GSD. If the general GSD file is used, the sensormust be set to the profile-specific ident number via the DTM software. By default, the sensor oper-ates with the manufacturer-specific ID number.Cyclical data trafficThe 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.