VEGA VEGACOM 557 Profibus FMS - Manual (Page 4)

4 VEGACOM 557 Profibus FMS
Product description
1 Product description
VEGACOM 557 is an interface converter for
conversion of VEGA specific protocols of
DISBUS and LOGBUS into standard data
formats.
The existing version of VEGACOM 557 is
used to convert data into the PROFIBUS FMS
data format (FMS = Fieldbus Message
Specification). As a peripheral device
(Slave), the instrument can be connected to a
PROFIBUS data line. The bus access is real-
ised according to the Master-Slave proce-
dure, enabling the master (e.g. a Simatic S5
with communication component CP 5431) to
collect data from the slave.
Measurement data and status information
from level and pressure measuring systems
can be transferred to the primary automation
systems, visualised there or further proc-
essed for control purposes.
This manual describes the required meas-
ures for
- VEGACOM 557 (mounting, connection,
settings) as slave
- connection group CP 5431 (parameter
settings) as master.
1.1 Function and configuration
Function
VEGAMET series 500 signal conditioning
instruments transmit measurement data and
status information via the DISBUS to
VEGADIS 174 indicating instruments.
VEGACOM 557 receives these data as par-
ticipant on the DISBUS in a DCS telegram.
The telegrams are written in VEGACOM 557
in a buffer memory.
DISBUS PROFIBUS
VEGAMET VEGACOM PROFIBUS
participant PROFIBUS-
Master
Connection of VEGACOM 557 to the DISBUS and the
PROFIBUS
LOGBUS
VEGALOG
PROFIBUS
Connection of VEGACOM 557 to the LOGBUS and the
PROFIBUS
PROFIBUS
participant VEGACOM PROFIBUS-
Master
There is a permanent data exchange on the
LOGBUS between the individual components
of VEGALOG 571. As a participant of
LOGBUS, VEGACOM 557 receives that part
of the LOGBUS telegram containing the
measured values and status information.
The data of DISBUS/LOGBUS are first written
into a buffer memory of VEGACOM 557.