SMAR FI303, Operation, Maintenance & Instruction Manual

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Introduction
III
INTRODUCTION
The
FI303 is from the first generation of Profibus PA devices. It is a converter mainly intended for
interface of a Profibus PA system to control valve or other actuators. The FI303 produces a 4-20 mA
output proportional to input received over the Profibus PA network. The digital technology used in
the
FI303 enables an easy interface between the field and the control room and several interesting
features that reduce considerably the installation, operation and maintenance costs.
The
FI303 is part of Smar's complete 303 line of Profibus PA devices.
Profibus PA, is not only a replacement for 4-20 mA or intelligent/smart transmitter protocols, it
contains much more.
The digital technology used in the
FI303 enables the choice of several types of transfer functions, an
easy interface between the field and the control room and several interesting features that
considerably reduce the installation, operation and maintenance costs.
Some of the advantages of bi-directional digital communications are known from existing smart
transmitter protocols: Higher accuracy, multi-variable access, remote configuration and diagnostics,
and multi-dropping of several devices on a single pair of wires.
The system controls variable sampling, algorithm execution and communication so as to optimize
the usage of the network, not loosing time. Thus, high closed loop performance is achieved.
Using Profibus technology, with its capability to interconnect several devices, very large control
schemes can be constructed. In order too be user friendly the function block concept was
introduced.
The
FI303 , like the rest of the 303 family, has some Function Blocks built in, like Analog Output and
Transducer and Display Blocks.
The need for implementation of Fieldbus in small as well as large systems was considered
when developing the entire 303 line of Profibus-PA devices. They have common features
and can configured locally using a magnetic tool, eliminating the need for a configuration
tool or console in many basic applications.
Get the best result of the FI303 by carefully reading these instructions.