VEGA VEGACOM 557 Profibus DP - Manual (Page 4)

4 VEGACOM 557 Profibus DP
Product description
1 Product description
1.1 Application
The VEGACOM 557 is an efficient and easy-
to-use interface converter (Gateway) for your
measurement applications. It is used for
conversion of the VEGA-specific protocols of
DISBUS and LOGBUS into standard data
formats.
The existing version is used for connection of
level or pressure measuring systems to
Profibus DP systems such as
- processing systems (DCS)
- personal computers (PC)
- stored program control (PLC).
In addition, it is used for connecting a PC for
configuration or visualisation via the VEGA
adjustment software.
If connection is made to Profibus DP sys-
tems, there is the possibility of calling up
measurement data and status information of
the measuring systems via the master of the
Profibus DP system. The coupling of the
Profibus DP is made via the connections on
the rear of the instrument. This data traffic
requires that special measures (described in
this manual) be taken in setting up the master
of the Pr ofibus DP. The data r eceived in the
master can be visualised there or further
processed for control purposes. In re-
stricted volume, signal conditioning instru-
ment-specific parameters can be outputted,
modified and returned again.
Via the PC interface on the front of VEGA-
COM 557, the VEGA visualisation software
„Visual VEGA“ or the VEGA configuration
software „VEGA Visual Operating“ (VVO) can
be operated. For these applications, the
coupling between VEGACOM 557 and a PC
is made directly with the connection cable
between the RS 232 interface (PC) on the
front of VEGACOM 557 and a standard Port
(e.g. COM1) of your PC. There is also the
possibility to provide a connection via mo-
dems.
VEGACOM 557 connections
1.2 Configuration
The component VEGACOM 557 is designed
in 19" technology with 5 TE width (1 TE = 5.08
mm) acc. to DIN 41 494. It can be used:
- in carrier BGT 596
- in VEGALOG 571 carrier BGT LOG 571
- in housing type 505.
The electrical connection of supply voltage,
DISBUS and Profibus DP is made via a plug
connection acc. to DIN 41 612 on the rear of
the component. The connection to LOGBUS
is made via an additional 5-pole plug-con-
nector mounted to the DIN-socket.
A 9-pole SUB-D plug marked “PC” is located
on the front panel of VEGACOM 557. It is
used for connection of a PC via RS 232C to
VEGACOM 557.
The component consists of two boards:
- the basic board
- the additional board.
On the basic board, you will find the power
supply unit, the PC interface, the DISBUS/
LOGBUS interface as well as the connections
for t he P rofibus DP.
The additional board is screwed to the basic
board and includes the hardware of the Profi-
bus DP interface as well as the protocol spe-
cific programs.
PC
interface
DISBUS
LOGBUS
Profibus DP
Supply
Basic board Additional board