Introduction To The Fieldbus - WEG CFW-11 User Manual

1 INTRODUCTION TO THE FIELDBUS

The Fieldbus is a digital communication system used in the industry to interconnect automation primary
elements, such as PLC's, drives, valves, sensors, actuators, etc., as illustrated in the figure below.
Nowadays, there is a great variety of protocols in the market, each one with its advantages and disadvantages.
It is up to the user/project designer to evaluate what the necessary requirements for the application are, and
choose among the available options.
Regardless of the choice, the main advantages of the industrial networks are:
Significant reduction in cable and installation costs;

start-up
Reduction in the

More reliability and efficiency;

Addition, removal and replacement of equipment with the network under load (supply);

Integration of several suppliers (standardization);

Effective process monitoring;

Configuration of devices via the network.
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By means of the Anybus-CC communication modules, the CFW-11 supports protocols widely spread in the
industry, like DeviceNet, Profibus DP-V1, EtherNet/IP, Modbus TCP and PROFINET IO. Besides this, by means
of passive modules, RS232 and RS485/422 interfaces are also available.
Following, the characteristics for Anybus-CC modules available for the frequency inverter CFW-11 are
presented.
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Figure 1.1: Illustration of a Fieldbus network
time;