Exam 7: Embedded Microcontrollers, Open and Closed Loop Process Control

MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the process control term with the correct definition of the term. Definitions may be used more than once. -Set point

Match the type of code t o its name. -Subroutine

MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the process control term with the correct definition of the term. Definitions may be used more than once. -Reference

An 8 -bit CPU has an address bus that is eight bits wide.

Floating control has three output levels of 0, 50, and 100 percent.

The system response is the change in the system output when a known stimulus, such as a step function, is applied to the system input.

Derivative action in a controller causes the final control element to change rapidly with rapid changes in the error.

The peak gain on the closed loop Bode response for a second order lag system should be between 8 and 10 db.

A SRAM is a static random access memory.

One difference between digital controller and analog controllers is that analog controllers produce an output almost instantly, while the digital output is based on the sampling rate.

Steady state error is the value of the error signal or the offset in the process variable after the control system has responded to a change and settled down to its final value.

Both synchronous and asynchronous ports provide serial I/O for the microcontroller.

A bias value can be used to correct for steady -state error, but the bias value must be changed whenever the set point is changed or a new disturbance is present.

MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the process control term with the correct definition of the term. Definitions may be used more than once. -Manipulated variable

In cascade and feedforward control the control systems uses two closed -loop systems to correct for system disturbances.

Which one of the following is NOT one of the advantages that control systems offer?

A process load change is a change in the process environment that causes the process to move away from the set point value.

The integral time for an integral controller is the time required for the integral controller output to match the change produced by the proportional controller output.

The error equation for a direct acting closed loop system is E=SP -PV.

A system model is a mathematic description of the system that generates the same transient and steady -state output response to a known input stimulus as the actual system.