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Direct digital control systems &Software. Introduction DDC Structure The position algorithm The velocity algorithm. Analog process. Direct digital control. DDC. Centralized User Interface ·Dynamic, Precise Facility Control ·Coordination of Facility Systems Operation - PowerPoint PPT Presentation
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Direct digital control systems&Software
IntroductionDDC Structure
The position algorithmThe velocity algorithm
Analog process
Direct digital control
DDC
• Centralized User Interface• ·Dynamic, Precise Facility Control• ·Coordination of Facility Systems Operation• ·Speed and Reliability from Computational
Power• ·Optimizing Facility Diversity• ·Durability and Flexibility• ·Troubleshooting/Easing of maintenance• ·Trending and History Data Logging• ·Customized Energy Reporting
DDC for chemical reactor
DDC structure
The Position algorithm
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The Velocity Algorithm
Two-Position Control
Two measure problems inVelocity algorithm
• CONTROLLER DRIFT
• Integral over shoot
Effect of set point band in Velocity algorithm
Benefits of DDC
• Improved Effectiveness
Improved Operational Efficiency
increased Energy Efficiency
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