VEGA VEGACOM 557 Modbus protocol - Manual (Page 6)

6 VEGACOM 557 Modbus
on
VEGAMET
513
!
ESC OK
- +
100
%
CONNECT
on
VEGAMET
513
!
ESC OK
- +
100
%
CONNECT
on
VEGAMET
513
!
ESC OK
- +
100
%
CONNECT
PC
VEGACOM
557
!
BA
on
DISBUS MODBUS
VEGAMET VEGACOM MOD-
BUS
master
Connection VEGACOM 557 to DISBUS
Modbus
participant
on
PC
VEGALOG
571
!
PC
VEGACOM
557
!
BA
on
on
LOGBUS MODBUS
Modbus
master Modbus
participant VEGACOM VEGALOG
Connection VEGACOM 557 to LOGBUS
Product description
VEGACOM 557 on DISBUS
VEGAMET series 500/600 signal conditioning
instruments transmit via the DISBUS cycli-
cally measured data and status information,
so called PC/DCS telegrams. VEGACOM 557
receives as participant on the DISBUS these
data and makes them available (in buffer
memory) for collection via the Profibus DP.
If a PC is connected to the PC interface (front
interface) of VEGACOM 557, this instrument
transfers acyclically (on request by the
VEGA configuration software VVO) measure-
ment loop parameters from or to VEGAMET.
Max. two VEGACOM 557 can be connected
to the same DISBUS. For clear identification,
different instrument addresses should be
assigned to both instruments.
VEGACOM 557 on LOGBUS
Data are exchanged continuously on the
LOGBUS between the individual components
of VEGALOG 571. VEGACOM 557 receives
as participant of this LOGBUS PC/DCS tel-
egrams including the measured values and
status information and makes them available
(in buffer memory) for collection via the Mod-
bus.
If a PC is connected to the PC interface (front
interface) of VEGACOM 557, this instrument
transfers acyclically (on request by the
VEGA configuration software VVO) measure-
ment loop parameters from or to VEGALOG
571.
Max. two VEGACOM 557 can be connected
to the same LOGBUS. The addressing for
clear identification is made automatically on
LOGBUS.