Information Technology Reference
In-Depth Information
DCS to the Fieldbus are:
•
Low-level control.
•
Process parameters.
•
Alarm generation.
•
Calibration information.
•
Device status.
•
Area control.
The DCS will still be responsible for the high-level control functionality and the interopera-
tiablily between areas. Thus, the functions that will stay on the DCS are:
•
Advanced control.
•
Interarea control (bring together the control of areas).
•
Production co-ordination.
•
Centralised configuration.
•
Alarm filtering.
•
Network administration.
•
Communicate with devices and service their requirements.
•
Maintain an overall database.
Function moved to the field:
• Low-level control.
• Parameter calculation.
• Alarm handling.
• Local area control.
Area
Smart transmitters
responsible for:
• Low-level control.
• Process Parameters.
• Alarm Generation.
• Calibration information.
• Device Status.
Smart
transmitter
Centralized host/
DCS
DCS responsible for:
• Advanced Control.
• Interarea Control.
• Production Co-ordination.
• Centralized Configuration.
• Alarm filtering.
• Network Administration.
• Maintaining a Global Database.
Area
Smart
transmitter
Figure 19.5
Functionality of a DCS/Fieldbus system
