Direct digital control systems &Software

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Presentation transcript:

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 ·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

`

The Velocity Algorithm

Two-Position Control

Two measure problems in Velocity algorithm CONTROLLER DRIFT Integral over shoot

Effect of set point band in Velocity algorithm

Benefits of DDC Improved Effectiveness increased Energy Efficiency Improved Operational Efficiency increased Energy Efficiency

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