Regulatory Control and PID Loop Tuning - IC-74

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This workshop provides instrumentation, automation and process engineers and technicians with the basic theoretical and practical understanding of regulatory control systems and how this can be applied to optimize process control in terms of quality, safety, flexibility and costs. Participants in the regulatory control and PID loop tuning course should bring laptop computers to the course.?Centered on the ISA-recommend PC-Control LAB simulator, participants will learn through active participation using exercises, questionnaires, and a series of 16 practical simulation sessions 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.

Instrumentation, automation and process engineers and technicians involved in specifying, installing, testing, tuning, operating and maintaining regulatory PID control systems.

You will Learn:

  • 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 considerationsProcess lag, capacitance and resistanceProcess reaction curve1st and 2nd order reactionsInstrumentation cablingFilteringAliasingReaction maskingSensor placementCorrect PVEffect of spanInherent and installed valve characteristicsActuatorsValve positionersTesting procedures and analysisON/OFF controlProportional controlProportional offsetResetIntegral action and windupStabilityDerivative actionPID control Control algorithmsLoad disturbances and offsetSpeed, stability and robustnessOpen loop reaction curve tuning method (Ziegler-Nichols)Default and typical settingsClosed loop continuous cycling tuning method (Ziegler-Nichols)Fine tuning'As found' tuningSurge tank level controlSplit/parallel range controlCascade systems Feed-forward and combined systemsRatio controlSystem integration Note: For full participation delegates should bring their own or company PC to the workshop. The PC should have sufficient administrative rights to allowed temporary downloading of the PC-Control LAB simulator (12 MB running on Windows 7).

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