DURATION

5 Days

DESIGNED FOR

This practical workshop, centered on the ISA-recommended PC-ControlLAB simulator, provides instrumentation, automation and process engineers and technicians with the basic theoretical and practical understanding of PID control systems.

ABOUT THE COURSE

Participants learn through active participation using a series of 20 practical simulation exercises covering: process reaction; tuning methods; diagnostic tools; affect of different algorithms; surge tank level control; analysis of such problems as valve hysteresis, stiction and non-linearities and the impact on controllability; and integral windup.

YOU WILL LEARN HOW TO

• Describe such terms as process lag, capacitance and resistance
• Explain the significance of the process reaction curve
• Identify the effects of filtering on loop performance
• Distinguish the effect of span on the system performance
• Analyze such problems as valve hysteresis, stiction and non-linearities
• Evaluate the effects of proportional, integral and derivative control
• Correctly apply both open and closed Loop Tuning according to Ziegler Nichols
• Apply ‘as found’ tuning
• Estimate the effects on loop tuning using a software-based loop analysis program
• Describe both cascade and feedforward control
• Explain split range control
• Identify and correct problems due to process dead time
• Discuss the top 20 mistakes made in the field of process control

COURSE CONTENT

• Basic process considerations
• Process lag, capacitance and resistance
• Process reaction curve
• 1st and 2nd order reactions
• Instrumentation cabling
• Filtering
• Aliasing
• Reaction masking
• Sensor placement
• Correct PV
• Effect of span
• Inherent and installed valve characteristics
• Actuators
• Valve positioners
• Testing procedures and analysis
• ON/OFF control
• Proportional control
• Proportional offset
• Reset
• Integral action and windup
• Stability
• Derivative action
• PID control
• Control algorithms
• Load disturbances and offset
• Speed, stability and robustness
• Open loop reaction curve tuning method (Ziegler-Nichols)
• Default and typical settings
• Closed loop continuous cycling tuning method (Ziegler-Nichols)
• Fine tuning
• ‘As found’ tuning
• Surge tank level control
• Split/parallel range control
• Cascade systems
• Feed-forward and combined systems
• Ratio control
• System integration