VEGA VEGACOM 557 Profibus DP - Manual (Page 7)

VEGACOM 557 Profibus DP 7
Function VEGACOM 557
Product description
DISBUS
LOGBUS
Profibus
DP Buffer
memory
Proc-
ess
image
Emis-
sion
memory
Test
conver-
sion
VEGACOM 557 on Profibus DP
The data communication between VEGACOM
557 and Profibus DP-Master is only carried
out if initiated by the master, which can en-
quire the requested information by means of
special control commands.
The data from DISBUS/LOGBUS are first
written in a buffer memory of VEGACOM 557.
The data set is transferred from this buffer
memory into a process image. The protocol
conversion software enquires the stored data
cyclically from the individual storage areas.
The data sets are checked and converted
into the Profibus DP data format. After the
conversion, the data are transferred into the
emission memory and are sent from there to
the Pr ofibus DP. The PROFIBUS DP transmits
the data to the DP-Master .
VEGACOM 557 with VVO or VV
Direct connection
As an alternative to the Profibus DP commu-
nication, a PC can be connected via the PC
interface (SUB-D-plug in the front panel of
VEGACOM 557). By means of the adjustment
and indicating software VEGA Visual Opera-
ting (VVO), the parameter adjustment can be
made on the signal conditioning instruments
connected to VEGACOM 557. The adjust-
ment concept includes the user -friendly con-
figuration and parameter adjustment of the
measuring system or the sensor with the
following instruments:
- VEGAMET series 500/600 signal condi-
tioning instruments
- VEGALOG 571 processing system
- VBUS ultrasonic/radar sensors.
The adjustment is menu-driven and window
orientated. No matter if a radar sensor , sev-
eral connected signal conditioning instru-
ments or a VEGALOG should be adjusted via
the PC, the procedure is always the same.
As another possibility , measur ed values and
fault signals of the entire processing facility
can be recorded and shown graphically by
means of the visualisation software VISUAL
VEGA (VV). T ools for pr ocessing and analy-
sis of history data are also available.
The configuration of the measurement loop
comprises, depending on the connected
instruments, e.g. the determination of output
functions or the configuration of individual
outputs or inputs. The user orientated editing
of measurement loops is supported by
graphic means, such as e.g. vessel draw-
ings and pictographs that adapt to the se-
lected general conditions and options.
With the graphic support also more complex
parameter adjustments such as e.g. the input
of a linearisation curve by means of index
markers can be done with ease.
Connection via modem
The PC interface supports, beside the direct
connection of a PC, also the operation via
modems. With this additional function, remote
parameter adjustment or remote diagnostics
of VEGA systems via VVO are possible.
Together with the visualisation softwar e Visual
VEGA, even remote visualisations can be
carried out.