29-12-2012, 06:06 PM
Fieldbus in Process Automation
Fieldbus in Process Automation.pdf (Size: 72.03 KB / Downloads: 21)
WHAT IS FIELDBUS :
Fieldbus foundation specifies “Fieldbus is a digital two-way, multidrop
communication link among intelligent measurement and control devices”. It is
one of local area networks dedicated for industrial automation. Modern
industries could not survive without information technologies and networks in
the 21st century. From production line to enterprise level, digital
communication supports all economical and social activities by its latest and
powerful technologies. Fieldbus is part of it and cannot be separated from
others.
FIELDBUS BENEFITS :
Fieldbus is expected to reduce the life-cycle cost of production line and then
total cost of ownership (TCO) of the plant.
Planning Phase :
Fieldbus allows us to integrate our plant assets on a single plant automation
system on the digital communication networks. We can connect devices from
multiple suppliers without custom software and these network-based systems
allow for smaller control rooms, smaller cabinet rooms and more information
productivity.
Installation phase :
Fieldbus offers reduced installation and material cost by replacing the
traditional one to one wiring scheme with networking or multi-drop
Fieldbus in Process Automation : Present Scenario
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configuration while intelligent field instruments make commissioning and plant
startup much faster and less expensive.
Operation Phase :
Fieldbus integrates various installations of control function into one system to
effectively optimize control of our plant. In addition, a unified human machine
interface (HMI) is provided for operation.
Maintenance Phase :
Fieldbus allows for the reporting of self diagnostics, calibration, and
environmental conditions of field instruments without disturbing the plant
control. It will also allows to our stock for spare parts.
Renovation Phase :
Enhanced functionality of field instruments is endless. Fieldbus devices are
becoming standard off the shelf instruments, which make it very cost-effective
and easy for we to extend the life of our plant.
Fieldbus in Process Automation : Present Scenario
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FOUNDATION FIELDBUS :
1. Fieldbus is not a product but a technology to make above benefits
available to end – users. Following two condition are necessary to
make them come true :
• Many vendors provide Fieldbus instruments.
• Those devices are interoperability.
2. Fieldbus foundation was established in 1994 to achieve these goals. Its
major actives are :
• To promote a single international Fieldbus to both users and
vendors.
• To deliver foundation Fieldbus specification.
• To Provide technologies for Fieldbus implementation including
education.
• To install an infrastructure to achieve interoperability.