VEGA VEGAFLEX 52P (Profibus PA) - Manual (Page 7)

VEGAFLEX 51P and 52P 7
Product description
Profibus adjustment structure
In the Profibus environment, there are differ-
ent adjustment concepts and adjustment
tools which often differ considerably from
manufacturer to manufacturer. From the us-
er’s point of view, a manufacturer-independ-
ent adjustment program which could be
operated directly on the Profibus DP, but also
at a central point (e.g. the engineering station
or the process control), would be ideal.
In the past, only the program "SIMATIC PDM",
based on the HART
® adjustment structure,
could fulfil this wish. However, this program
also has the limitations common to HART
® . As
with HART ® , the availability of an instrument-
specific database for a comprehensive ad-
justment with PDM (Process Device Manag-
ing) is a requirement. Otherwise, only the
basic instrument functions such as adjust-
ment will be available. In the PDM environ-
ment, this instrument-specific database is
called EDD (Electronic Device Description),
in complete analogy to the HART
® environ-
ment which, except for the VEGA-HART ®
instruments, also requires a DD (Device
Description) for each sensor.