Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 14, Problem 6RQ
Program Plan Intro
Closed-loop control system:
- A feedback path is employed in closed-loop control system to measure the original system parameters such as pressure, speed, and so on.
- Here, the controller produces an error signal which initiates corrective action and energize the output device.
- The main characteristic of a closed-loop control system is that it can sense and measure the actual output of the system.
- Examples of closed-loop systems include cooling system in car, water level controller, tracking radar systems, and many others.
Explanation of Solution
b.
Function of process variable:
- Process variable is also called as process value or process parameter and usually abbreviated as PV...
Explanation of Solution
c.
Function of error amplifier:
- Error amplifier is used to determine the matching between the set point and the process operation...
Explanation of Solution
d.
Function of controller:
- Controllers are used to produce output signals...
Explanation of Solution
e.
Function of output actuator:
- Output actuators are normally used to convert system output electrical signals into physical actions...
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Chapter 14 Solutions
Programmable Logic Controllers
Ch. 14 - Compare continuous and batch processes.Ch. 14 - Prob. 2RQCh. 14 - State the basic function of each of the following...Ch. 14 - State the purpose of each of the following types...Ch. 14 - Prob. 5RQCh. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - Prob. 8RQCh. 14 - Prob. 9RQCh. 14 - Prob. 10RQ
Ch. 14 - Prob. 11RQCh. 14 - What term of a PID control is designed to...Ch. 14 - Prob. 13RQCh. 14 - Prob. 14RQCh. 14 - Prob. 15RQCh. 14 - Prob. 16RQCh. 14 - Prob. 17RQCh. 14 - Prob. 18RQCh. 14 - Prob. 19RQCh. 14 - List four types of communication tasks provided by...Ch. 14 - Prob. 21RQCh. 14 - What are the three general levels of functionality...Ch. 14 - Prob. 23RQCh. 14 - Prob. 24RQCh. 14 - Compare device and process bus networks.Ch. 14 - Prob. 26RQCh. 14 - Prob. 27RQCh. 14 - Prob. 28RQCh. 14 - Prob. 29RQCh. 14 - Summarize the collision detection network access...Ch. 14 - Prob. 31RQCh. 14 - Prob. 32RQCh. 14 - Prob. 33RQCh. 14 - Prob. 34RQCh. 14 - Prob. 35RQCh. 14 - Prob. 36RQCh. 14 - Prob. 37RQCh. 14 - Prob. 38RQCh. 14 - Prob. 39RQCh. 14 - Explain how redundant media works.Ch. 14 - Prob. 41RQCh. 14 - Prob. 42RQCh. 14 - Prob. 43RQCh. 14 - Prob. 44RQCh. 14 - Summarize the two main functions of a SCADA...Ch. 14 - Prob. 46RQCh. 14 - Prob. 1PCh. 14 - Prob. 2PCh. 14 - How would an on/off controller respond if the...Ch. 14 - In a home heating system with on/off control, what...Ch. 14 - a. Calculate the proportional band of a...Ch. 14 - Prob. 6PCh. 14 - Prob. 7PCh. 14 - Prob. 8P
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- Identify the property of closed-loop control system a. a control system that uses negative feedback b. a control system that does not use feedback c. a control system that uses feedback d. a control system that uses positive feedbackarrow_forward3. A closed-loop system is distinguished from open-loop system by which of the following ? (a) Servomechanism (b) Feedback (c) Output pattern (d) Input patternarrow_forwardDevelop a PLC-based ladder logic program for automatic packaging system: 1.Draw and explain ladder logic diagram to run a conveyor motor using the following conditions: a.AND Logic Function b.NOR Logic Function Analyze the following conditions: a.Upgrade the ladder diagram such that the motor runs in both clockwise and anti-clockwise direction. b.Use two light indicators to indicate the direction of motor rotation. c.Use a photosensor to detect the package on the conveyor d.Add start stop logic (Use both AND logic and OR logic, where necessary use switches to control the direction)arrow_forward
- 10. Consider the following state diagram of control unit, that has four states and two inputs x and y. Design the control with multiplexer. X=0) CO 141 00 01 X=0) yu0 x=0 10arrow_forwardComputer Science Design of ALU control circuit for maximum 4 input variables (Ainvert, Binvert , F1 and F0) using QMMarrow_forwardDesign a combinational circuit with four inputs— A, B, C, and D —and one output, F . F is to be equal to 1when A = 1, provided that B = 0, or when B = 1, provided that either C or D is also equal to 1. Otherwise,the output is to be equal to 0.1. Obtain the truth table of the circuit.2. Simplify the output function.3. Draw the logic diagram of the circuit, using NAND gates with a minimum number of ICs.4. Construct the circuit and test it for proper operation by verifying the given conditions.arrow_forward
- Time response state Discuss briefly the 2 states of time response in control systems.arrow_forward3. Design an appropriate combinational circuit that implements a digital system with the following output functions an AC remote: ON, OFF, MODE, SHIFT, FAN, SMART, SWING, ECO using a decoder.arrow_forwardComputer Science 1. Design a circuit for a digital lock using the minimum number of D latches. The lock has two input push-button switches A, B and it outputs a single pulse (Z1) for each activation i.e. lock open. The two switches are interlocked mechanically so that simultaneous pulses are not possible. The lock should have the following features: a. The opening sequence is 0011. ii. Then replace ‘0’ by ‘A’ and ‘1’ by ‘B’ in the sequence. b. Five B pulses should give an absolute reset. c. Any incorrect use of the A switch will cause an output (Z2) to ring a bell to warn that the lock is being tampered.arrow_forward
- A PLC is used to control a single-axis robot, in which the axis is driven by a pneumatic cylinder. An output signal to the pneumatic cylinder causes it to extend (ON state). When there is no signal, the pneumatic cylinder retracts (OFF state). The gripper is an also driven by a pneumatic cylinder. The gripper open position is an OFF state and the closed position is an ON state. In order to perform a task, the following sequence of operations must be performed: TH Sequence No. Аxis Gripper OFF OFF 1 ON OFF ON ON 3 OFF ON 4 OFF OFF The process begins when the start bush button is ON and a part triggers a limit switch. For safety, an emergency switch is used to shut off the entire system. Design a PLC ladder diagram for this application.arrow_forwardDesign of ALU control circuit for maximum 4 input variables (Ainvert, Binvert , F1 and F0) using QMM((please use ""QMM"" its mandatory))arrow_forward3- Draw the PLC ladder logic of the following: X = ((A · B · C) + B) · B · (A + Ĉ) %3Darrow_forward
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