PID SKILL CHALLENGE

PID SKILL CHALLENGE

For this challenge, assume:

• The velocity form of the PID equation is used
• Increasing the Output (OP) causes the Process Variable (PV) to rise
• P, I, and D represent the contributions of the Proportional, Integral, and Derivative
• P, I, and D are summed and added to the last Output on each scan (update cycle)
• P, I, and D act on the Error
• Each dot on the trend represents a process sample value
• The left side of the trend shows older samples, while the right side reflects the most recent
• The D is calculated from the most recent 3 samples (right 3 dots)

For each of the 10 scenarios, decide whether P, I, and D will attempt to increase (+), decrease (−), or have no effect (0) on the Output. The following are the options to choose from:

•   0   No effect on the Output
•   +   Adds to the OP (Increases)
•   −   Subtracts from the OP (Decreases)