VEGA VEGAFLEX 55P (Profibus PA) - Manual (Page 25)

VEGAFLEX 55P (Profibus PA) 25
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 , un-
der 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.
VEGA’s adjustment program VVO can ac-
cess the adjustment options of VEGA sen-
sors in their entirety and, if necessary, can
update the complete sensor software. To do
this, the adjustment program must be in-
stalled on a PC which is equipped with a
Profibus Master Class 2 interface card
(Softing) (see illustration on next page).
The PC with the Profibus interface card can
be connected directly to any position of the
DP bus by using the standard RS 485 Profi-
bus cable.
The adjustment and parameter data can be
saved at any time on the PC with the adjust-
ment software and can be protected by
passwords. If necessary, the adjustments
can be transferred quickly to other sensors.
In practice, the adjustment program VVO is
often installed as a tool on an engineering
station or operating station. VVO then ac-
cesses all VEGA sensors directly over the
bus via the Profibus interface card (e.g. from
Softing) as Master Class 2, from the DP level
to the PA level (via segment coupler) right
down to the individual sensor.
Device description (DD)
Beside the instrument master file (GSD), with
which a sensor is logged into the Profibus
system, the majority of all Profibus sensors
also requires for adjustment, beside the
specific adjustment software, a so-called
EDD (Electronic Device Description) for each
sensor. This enables sensor access and
adjustment from the bus levels. VVO,
however, does not require this. The
adjustment software VVO can communicate
at any time with all VEGA sensors without the
help of a special database. Of course, all
other non-Profibus VEGA sensors can be
adjusted with the adjustment software as well
(4 … 20 mA sensors or VBUS sensors). With
VEGA sensors, it is not necessary to go
looking for the latest EDD. Expected by
many users, this is the basic prerequisite for
a manufacturer-independent adjustment
program.