1. Direct digital control systems &Software
Introduction
DDC Structure
The position algorithm
The velocity algorithm

2. Analog process

3. Direct digital control

8. 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

11. DDC for chemical reactor

12. DDC structure

18. The Position algorithm

22. `

24. The Velocity Algorithm

27. Two-Position Control

29. Two measure problems in Velocity algorithm
CONTROLLER DRIFT
Integral over shoot

30. Effect of set point band in Velocity algorithm

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