Why select a fieldbus system
independent of proprietary solution vendor independent cost savings increase of productivity in terms of
faster more flexible easy expandable customized
Chapter 1 Date 11/04/99, page 3
What a fieldbus system needs to offer
deterministic (since parallel wiring will be replaced) flexible interoperable (multi-vendor use) cost effective (installation, startup, service) reliable and safe easy to use solution for all your automation needs
The foundations of this book lie in the highly successful text Principles of Measurement
and Instrumentation by the same author. The first edition of this was published in 1988,
and a second, revised and extended edition appeared in 1993. Since that time, a number
of new developments have occurred in the field of measurement. In particular, there
have been significant advances in smart sensors, intelligent instruments, microsensors,
digital signal processing, digital recorders, digital fieldbuses and new methods of signal
The purpose of this guide is to provide information about the Fieldbus* network so that its wiring
system can be designed and installed for cost-effective and reliable operation. There are many
uses for Fieldbus and many ways it can be configured. It is not possible to give simple rules for
wiring a Fieldbus that a robot could follow and get optimum results. For this reason, this guide will
first explain how the Fieldbus works so that the wiring system can be designed intelligently to
achieve the best performance and the most reliable operation with the lowest cost....
–Function Blocks, Functions, Data Types, Programs
–Ladder Diagram (LD) for logic control (“power flow”)
–Function Block Diagram (FBD) for regulatory control (“data flow”)
–Sequential Function Chart (SFC) for state-machine control
–Structured Text (ST) for information processing
–Instruction List (IL) for assembly-level programming
•A Mature, Internationally Adopted Standard
–First edition: 1993
–Second edition: 2001...
This edition is not completely new. The second
edition built on the first, and SO does this edition.
This work has been almost entirely one of “internationalizing”
a work mainly written for the UK.
New matter has been added, especially in the
areas of analyzers, level and flowmeters, and
fieldbus. References to standards are various,
ard British Standards are often referenced. International
standards are in flux, and most standards
bodies are striving to have equivalent
standards throughout the world.
DC systems drive in the world
The Mentor ll provides a wide power range of fully programmable DC drives with a unified control interface. Simple stand-alone applications are quickly configured with a minimum of parameters. Add the application module (MD29) to implement high performance drive systems with local intelligence. This intelligence can then be utilised to eliminate the master PLC by constructing a distributed control system, using the CTNet fieldbus with the System Programming Tool (SYPT).