Specifications

432E4010.fm/2
24 March 2004
Communication
and supervision
Communication interfaces
and associated services
Switchboard-data acquisition and
monitoring make it possible to anticipate
events. In this way, they reduce customer
costs in terms of operation, maintenance
and investment.
Serial link
With communication technology, it is no longer necessary to be physically present
on the site to access information. Data is transmitted by networks.
In all architectures, the communication interface serves as the link between the
installation devices and the PC running the operating software. It provides the
physical link and protocol adaptation.
Adaptation is required because the communication systems used by the PC
(Modbus via RS 232 and/or Ethernet) are generally not those used by the installation
devices (e.g. the Modbus protocol via RS 485).
Dedicated application software prepares the information for analysis under the best
possible conditions.
DB101068
Modbus communication architecture.