Industrial Information Systems Overview

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Questions and Answers

What is the primary function of industrial actuator systems?

To sense physical variables in a process

To convert output signals into electrical voltages

To filter out noise from input signals

To amplify energy to produce desired process changes (correct)

How do actuators differ from sensors in industrial control systems?

Actuators measure flow as opposed to sensors

Actuators convert electrical voltages to physical signals without amplification

Actuators are used for sensing temperature changes

Actuators have higher power capabilities than sensors (correct)

Which component of the actuator accepts commands from the control system?

Electronic signal-processing element (correct)

Feedback control unit

Power amplification element

Servo-amplifier

What role does the electronic power amplification element typically play in an actuator?

It may include stages for linear power amplification Signup and view all the answers

What is often included in many actuators to ensure precision in operation?

Closed feedback control systems Signup and view all the answers

What type of signals do actuators typically convert to perform their function?

Electrical signals into mechanical movements Signup and view all the answers

What might be filtered by the electronic signal-processing element in an actuator?

Input signals of specific frequencies Signup and view all the answers

Which of the following describes the energy level manipulation by actuators?

They amplify energy levels for enhanced output. Signup and view all the answers

What is a characteristic of industrial information systems regarding their response to stimuli?

They are reactive in nature. Signup and view all the answers

Which statement best describes the real-time requirement of industrial information systems?

Computations must be accurate and timely. Signup and view all the answers

Why are industrial information systems considered mission-critical?

Failure can lead to catastrophic consequences for human life or property. Signup and view all the answers

Which type of industries perform production operations on amounts of materials such as liquids and gases?

Process industries Signup and view all the answers

What is the role of fault-tolerance in industrial information systems?

To ensure safety and handle unforeseen circumstances predictably. Signup and view all the answers

How do lower level automation systems primarily differ from more sophisticated automation systems?

They utilize more hardware and electronics rather than IT. Signup and view all the answers

What is a key consideration when designing industrial information systems?

Meeting computing time deadlines is essential. Signup and view all the answers

In the context of industrial automation, what blended feature characterizes more sophisticated systems?

Integration with sales, finance, and supply chain. Signup and view all the answers

Which statement best describes discrete control in the process industries?

It is more associated with batch processing. Signup and view all the answers

What is a key objective of batch process control?

To manage the sequence and timing of processing steps. Signup and view all the answers

Which of the following best describes the origins of computer process control?

It originated during the late 1950s and early 1960s. Signup and view all the answers

Which feature allowed early computers to respond quickly to process needs?

The interrupt feature. Signup and view all the answers

What distinguishes batch processing from continuous processes?

Batch processing involves a cycle of processing steps. Signup and view all the answers

In the context of batch processing, what does packaging involve for pharmaceuticals?

Filling bottles with medicine tablets. Signup and view all the answers

Which type of control does batch process control typically include?

Both continuous and discrete control. Signup and view all the answers

What challenges did computers face in the early development of process control?

Size, cost, and reliability issues. Signup and view all the answers

What is the purpose of the interlock signal transmitted by the gripper's sensor?

To indicate that corrective action is needed before continuing the work cycle Signup and view all the answers

What defines an output interlock in an automation system?

A control signal sent from the controller to an external device Signup and view all the answers

What feature allows a computer control system to execute a higher priority program over a current one?

Interrupt system Signup and view all the answers

What happens to the status of the current program when an interrupt signal is received?

It is suspended and remembered for later resumption Signup and view all the answers

Why is an interrupt system essential in process control?

To prioritize the execution of more important programs over less important ones Signup and view all the answers

Who is responsible for determining the priority levels of control functions in a system?

The system designer Signup and view all the answers

Which describes an example of how an output interlock is used?

To begin an automatic cycle after loading a work part Signup and view all the answers

What is a primary function of the interrupt system in a computer control feature?

To switch to a predetermined subroutine for interrupts Signup and view all the answers

What characterizes a time-driven event in discrete control systems?

It is executed after a specific time has elapsed. Signup and view all the answers

Which of the following is an example of a time-driven event?

The factory clock ringing at shift start. Signup and view all the answers

Which type of control is used to manage event-driven changes?

Logic Control Signup and view all the answers

What is a primary characteristic of switching systems in discrete control?

Their output values are based on current inputs. Signup and view all the answers

In sequence control, how are actions in a production system coordinated?

Through predefined sequences of events. Signup and view all the answers

What does logic control primarily rely upon to determine output?

The current values of inputs. Signup and view all the answers

Which of the following is not an example of a time-driven event?

Turning a light on when a sensor is triggered. Signup and view all the answers

Which process is typically associated with sequence control in manufacturing?

Coordination of the transfer of parts. Signup and view all the answers

Study Notes

Industrial Information System Features

Industrial information systems are generally reactive, meaning they respond to stimuli
Industrial information systems are real-time, meaning the computations must be timely and accurate
Industrial information systems are mission-critical because malfunctioning can lead to catastrophic consequences

Process Industries vs. Discrete Industries

Production in process industries is performed on materials like liquids, gases, and powders
Production in discrete manufacturing industries focuses on quantities of materials, such as parts and product units
Both industries have different unit operations performed on materials

Industrial Actuator Systems

Convert control system computed signals into forms applicable to the actual process
Function in reverse of sensors - Convert controller output into physical variables like torque, heat, and flow
Amplify energy level of the signal to cause changes in process variables

Discrete Control Systems

Execute by a controller at a specific point in time or after a certain time elapsed
Examples include factory shop clocks, heat treating operations, and washing machine agitation cycles

Discrete Control Systems: Logic Control

Event-driven changes are controlled by logic control
Switching systems whose output is determined by input values
Used to coordinate actions in transfer lines and automated assembly machines (e.g., part transfers, tool changes)

Discrete Control Applications in Process Industries

Associated with batch processing in process industries
Each batch of ingredients undergoes a processing cycle with parameter changes and potential transfers
The objective of batch process control is to manage the timing and sequence of steps while regulating parameters

Computer Process Control

Origins in the 1950s and 1960s, with slow, large, expensive, and unreliable mainframe computers being the main processors
The interrupt feature was developed during this period, suspending program execution to respond to process needs quickly
Used in oil refineries and chemical plants, with high-volume continuous production processes characterized by many variables and control loops

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Description

Explore the essential features and differences between industrial information systems, process industries, and discrete manufacturing. This quiz covers key functions of actuator systems, real-time processing, and the critical nature of these systems in industrial applications. Test your understanding of how these elements interact in various industrial contexts.