Communications Overview; Ethernet; Rs485 Modbus; Profibus - ABB Navigator 540 Instruction Manual

2 Communications overview

Extensive communication options enable the Navigator
AWT540 transmitter to be integrated into larger control
systems easily or connected to other process instrumentation.
The following sub-sections describe the options available.

2.1 Ethernet

Optional Ethernet communications enable the Navigator
AWT540 to be integrated in to an Ethernet network quickly.
The following functionality is provided:
— Email
Notification of a critical process event or status can be
made by email. Multiple events can trigger an email that
can be sent to multiple recipients.
— Webserver
Navigator AWT540's integrated webserver enables the
current status of the process and controller to be viewed
remotely using a standard web browser.

2.2 RS485 Modbus

Using RS485 Modbus, values and status can be
communicated between a master (or host) computer and the
Navigator AWT540 in real-time via an RS485 connection.
6 COM/AWT540/PB–EN Rev. C | Navigator 540 | Transmitter

2.3 PROFIBUS

PROFIBUS is a manufacturer-independent, open Fieldbus
standard for a wide range of applications in manufacturing,
process and building automation. Manufacturer independence
and openness are ensured by the international standard EN
50170.
Using the PROFIBUS protocol, devices from different
manufacturers exchange information on the same
communications bus without the need for special interface
equipment.
For further information on PROFIBUS, refer to:
www.profibus.com.

2.3.1 PROFIBUS DP

PROFIBUS DP is designed for high-speed data exchange and
is commonly used by complex or externally-powered devices.
The central controller or 'master' device (for example, PLC or
PC) utilizes PROFIBUS DP as a fast serial connection with
distributed (slave) PROFIBUS-enabled field devices.
The master device reads the input information cyclically in a
defined, recurring order from the slave(s). When configuring the
bus system, the user assigns an address in the range 0 to 125
to each slave device and also defines which of the slaves are to
be included in, or excluded from, the data acquisition cycle.

2.3.2 PROFIBUS and ABB products

Navigator AWT540 utilizes PROFIBUS DP as this protocol is
optimized for high speed and low connection costs (see
www.abb.com/fieldbus and follow the PROFIBUS link).