Introduction; Profibus; Profibus Dp; Profibus Pa - ABB Aztec 600 User Manual

Aztec 600
Colorimetric and ion-selective analyzers

1 Introduction

Note. This Supplementary User Guide contains information
specific to PROFIBUS DP-enabled Aztec 600 and Aztec ISE
analyzers and must be read in conjunction with the User
Guide relevant to each model.

1.1 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,
manufacturers exchange
communications bus without the need for special interface
equipment.
The PROFIBUS family comprises three types of protocol,
PROFIBUS DP, PROFIBUS FMS and PROFIBUS PA, each of
which is used for different tasks. Of these three protocols, the
most important for process automation are PROFIBUS DP and

PROFIBUS PA.

Further information on
www.profibus.com.

1.1.1 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 (e.g. PLC or PC) utilizes
PROFIBUS DP as a fast serial connection with distributed (slave)
field devices such as PROFIBUS-enabled Aztec 600 analyzers.
DP-V0 is the basic stage of the PROFIBUS DP communication
protocol. DP-V0 provides cyclic data exchange between master
and slave devices.
The Aztec 600 analyzers also support the DP-V1.0 extension
that enables additional acyclic communication between master
and slave devices.
2
devices from different
information on the
PROFIBUS can be found
1.1.2 PROFIBUS PA
PROFIBUS PA is
automation field devices that require power via the network with
the option to use intrinsic safety for hazardous areas. Typical
devices using this protocol include transmitters and positioners.
A DP/PA coupler or link device is used to connect the
PROFIBUS PA network to the PROFIBUS DP network.

1.2 PROFIBUS and ABB Products

Aztec 600 analyzers utilize PROFIBUS DP as this is the protocol
optimized for high speed and low connection costs (see
www.abb.com/fieldbus

1.3 PROFIBUS DP Transmission Technology

same
The transfer method of PROFIBUS DP is RS485 – a proven
technology. A twisted, shielded, two-wire copper cable is used
as the transfer medium.
The bus structure enables addition and removal of stations or
step-by-step commissioning of the system without affecting
other stations. Later expansion has no influence on stations
already in operation.
Transmission speeds of between 9.6 kbit/s and 12 Mbit/s are
at
available. One uniform transmission speed is selected for all
devices on the bus when the system is commissioned.
1 Introduction
designed to accommodate
and follow the PROFIBUS link).
IM/AZT6PBS–EN Rev. D
process