Programmable Logic Controllers
5th Edition
ISBN: 9780073373843
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Question
Chapter 12, Problem 4RQ
Program Plan Intro
a.
Programmable Logic Controller (PLC):
- Programmable Logic Controller (PLC) is a specialized computer used in industrial segments to control machines and process.
- PLC is program that consists of a set of instructions which resembles the controlling functions needed to perform specific tasks.
- The function of PLC is similar to that of a relay and hence, in an industrial segment a relay is greatly replaced by a suitable PLC.
- When compared to general Personal Computer (PC), a PLC is available in small and tiny sizes.
- The basic architecture of a PLC consists of an input-output interface module and a small Central Processing Unit (CPU) that runs by controlling
programming language.
Sequencers:
- PLC sequencer performs ON or OFF output patterns using sequencer instructions.
- The sequencer output instruction is used for controlling the output devices.
- PLC sequencer instructions are used for controlling machines which provides a stepped sequence of repeatable operations.
- It simplifies the ladder program by allowing the user to use a single or pair of instructions for performing complex operations.
- Various sequencer instructions can be programmed based on the PLC manufacturer.
Program Plan Intro
b.
Sequencers:
- PLC sequencer performs ON or OFF output patterns using sequencer instructions.
- The sequencer output instruction is used for controlling the output devices.
- PLC sequencer instructions are used for controlling machines which provides a stepped sequence of repeatable operations.
- It simplifies the ladder program by allowing the user to use a single or pair of instructions for performing complex operations.
- Various sequencer instructions can be programmed based on the PLC manufacturer.
Program Plan Intro
c.
Sequencers:
- PLC sequencer performs ON or OFF output patterns using sequencer instructions.
- The sequencer output instruction is used for controlling the output devices.
- PLC sequencer instructions are used for controlling machines which provides a stepped sequence of repeatable operations.
- It simplifies the ladder program by allowing the user to use a single or pair of instructions for performing complex operations.
- Various sequencer instructions can be programmed based on the PLC manufacturer.
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4. Define an XIO instruction. Write down the symbol for it. Draw a PLC
programming diagram using this instruction and others to turn on a light. Explain
its operation.
Explain the functionality of set and reset instruction in PLC program. Sketch theexample of these functions .
What is the operation of MOVS instruction?
Chapter 12 Solutions
Programmable Logic Controllers
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Similar questions
- Discuss in detail the components of a PLC with suitable sketch.arrow_forwardDerive the micro-operations and respective control signals in the same fashion as Table for the processor in Figure for the instruction thati- adds Accumulator to MBR.ii- Loads M(X) to Accumulatorarrow_forwardDatapath Given the data path of the LC-3, give a complete description of the STR instruction, as outlined in the following questions STR R5, R4, #-28arrow_forward
- Explain the general structure of programmable controllers (PLC) by drawing figures. Write the names of the control elements to be connected to the input and output parts of the PLC.arrow_forwardDesign the hardwired control unit using sequence counter method for 8 instructions. Consider 2 control signals are REQuired for futch operation.arrow_forwardDesign a circuit of the General register organization in which 16 registers are there from R0 to R15. (a) Perform the following microoperation and explain the operation in the steps through the diagram properly: - ADD R13, R7, R10. (b) Explain the control word as per the register configuration given above.arrow_forward
- Describe the SBB instruction in further detail.arrow_forwardDesign a PLC program and prepare a typical I/O connection diagram and ladder logic program for the following motor control specifications: • Three starters are to be wired so that each starter is operated from its own start/stop pushbutton station. • A master stop station is to be included that will trip out all starters when pushed.arrow_forwardDraw the timing diagram for MARIE’s Subt instruction using the format of Figure 4.16.arrow_forward
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