Contents
Closed-loop control
Basic feedback control principles
Diagnosing feedback control problems
On/off control
Proportional-only control
Proportional-only offset
Integral (reset) control
Derivative (rate) control
Summary of PID control terms
Proportional control mode (P)
Integral control mode (I)
Derivative control mode (D)
P, I, and D responses graphed
Responses to a single step-change
Responses to a momentary step-and-return
Responses to two momentary steps-and-returns
Responses to a ramp-and-hold
Responses to an up-and-down ramp
Responses to a multi-slope ramp
Responses to a multiple ramps and steps
Responses to a sine wavelet
Note to students regarding quantitative graphing
Different PID equations
Parallel PID equation
Ideal PID equation
Series PID equation
Pneumatic PID controllers
Proportional control action
Automatic and manual modes
Derivative control action
Integral control action
Fisher MultiTrol
Foxboro model 43AP
Foxboro model 130
External reset (integral) feedback
Analog electronic PID controllers
Proportional control action
Derivative and integral control actions
Full-PID circuit design
Single-loop analog controllers
Multi-loop analog control systems
Digital PID controllers
Stand-alone digital controllers
Direct digital control (DDC)
SCADA and telemetry systems
Distributed Control Systems (DCS)
Fieldbus control
Practical PID controller features
Manual and automatic modes
Output and setpoint tracking
Alarm capabilities
Output and setpoint limiting
Security
Digital PID algorithms
Introduction to pseudocode
Position versus velocity algorithms
Note to students
Proportional-only control action
Integral-only control action
Proportional plus integral control action
Proportional plus derivative control action
Full PID control action
Review of fundamental principles
Index