EBK LOGIXPRO PLC LAB MANUAL FOR PROGRAM
5th Edition
ISBN: 8220102803503
Author: Petruzella
Publisher: YUZU
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Chapter 11, Problem 11P
Program Plan Intro
Count-Up (CTU) Counter:
- The CTU counter refers to an up counter
- This counter is used to count an event that occurs logically or externally and places that value in the counter’s accumulator.
- The accumulated value can even be maintained during false rung conditions and can be reset back to 0 using reset instruction.
Math functions:
The basic math functions performed by PLCs are as follows:
- Addition
- This function is used to add one piece of data to another.
- It is also called as ADD.
- Subtraction
- This function is used to subtract one piece of data from another.
- It is also called as SUB.
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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.
Develop 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)
Chapter 11 Solutions
EBK LOGIXPRO PLC LAB MANUAL FOR PROGRAM
Ch. 11 - Explain the function of math instructions as...Ch. 11 - Prob. 2RQCh. 11 - What standard format is used for PLC math...Ch. 11 - Prob. 4RQCh. 11 - Prob. 5RQCh. 11 - Prob. 6RQCh. 11 - Prob. 7RQCh. 11 - Prob. 8RQCh. 11 - Prob. 9RQCh. 11 - Prob. 10RQ
Ch. 11 - With reference to the instruction of Figure 11-34,...Ch. 11 - With reference to the instruction of Figure 11-35,...Ch. 11 - Prob. 1PCh. 11 - Prob. 4PCh. 11 - Prob. 5PCh. 11 - Prob. 7PCh. 11 - Prob. 8PCh. 11 - With reference to math instruction program shown...Ch. 11 - With reference to the math instruction program...Ch. 11 - Prob. 11PCh. 11 - Prob. 12P
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