VEGA VEGAFLEX 52P (Profibus PA) - Manual (Page 31)

VEGAFLEX 51P and 52P 31
Setup
4 Setup
4.1 Adjustment media
All VEGA Profibus sensors operate in profile
3 and can be adjusted with:
- the adjustment program VVO on a PC with
Profibus card
- the adjustment program PACTware TM , under
which VVO runs as a subprogram
- the Siemens software PDM in conjunction
with an EDD (Electronic-Device-Descrip-
tion)
- the adjustment module MINICOM in the
sensor.
Adjustment with VVO on the PC
The adjustment program VVO enables user-
friendly adjustment of VEGA Profibus PA
sensors. All functions and options of sensor
adjustment are accessible. The program
runs under Windows
® on a PC with a Profi-
bus-Master-Class 2 interface card on Profi-
bus DP level as Master-Class 2 tool. The
VVO program accesses the VEGA PA sen-
sors via the DP bus, the segment coupler
and the PA bus.
The adjustment program VVO from VEGA
makes full range of functions of VEGA sen-
sors available and can update the entire
sensor software if necessary. For this reason,
the adjustment program must be installed on
a PC which is equipped with a Profibus-
Master-Class 2 interface card (Softing) (see
figure on the next page).
The PC with the Profibus interface card can
be connected directly at any location on the
DP bus by means of the standard RS 485-
Profibus cable.
The adjustment and parameter data can be
saved with the adjustment software on the
PC and protected by passwords. On re-
quest, the adjustment can be also trans-
ferred to other sensors.
In practice, the adjustment program VVO is
often installed as a tool on an engineering
station or an adjustment station. VVO then
accesses over the bus each VEGA sensor
via the Profibus interface card (e.g. from
Softing) as Master-Class 2, from the DP level,
through the segment coupler on the PA level
right down to the individual sensor
Device description (DD)
Beside the instrument master file (GSD), by
which a sensor is logged on the Profibus
system, the majority of all Profibus sensors
requires for adjustment, beside the specific
adjustment software, also a so-called EDD
(Electronic Device Description) for each
sensor, to access and adjust the sensor from
the bus levels. This is not the case with VVO.
The adjustment software VVO can communi-
cate at any time with all VEGA sensors with-
out requiring a special database. Of course,
all other VEGA sensors can be adjusted with
the adjustment software as well (4 … 20 mA
sensors or VBUS sensors). With VEGA sen-
sors, it is not necessary to go looking for the
latest EDD. This is the essential requirement
of a manufacturer-independent adjustment
program anticipated by many users.