Ramirez_Rony_9_PLC_1

docx

School

Clemson University *

*We aren’t endorsed by this school

Course

2220

Subject

Mechanical Engineering

Date

Feb 20, 2024

Type

docx

Pages

Uploaded by CaptainFang13324

Rony Ramirez Jr PLC Lab Report ME 2220 Section 009 Siqi Zheng “I certify that all the writing presented here is my own and not acquired from external sources (including the student lab manual). I have cited sources appropriately and paraphrased correctly. I have not shared my writing with other students, nor have I acquired any written portion of this document from past or present students.”87 ______Rony Ramirez Jr________

1 Introduction: In engineering applications, the main focus of the Programmable logic controller (PLC) is in industrial application for processes such as automation, event recording, and safety equipment monitoring. A Programmable logic controller (PLC) is an industrial computer. In the lab, we also used a Human-machine interface (HMIs) which allows users to have a means for interacting with and monitoring a PLC. Using Programmable logic controllers will enable industries to operate assembly lines or machinery to any needed activities for a manufacturing process. This lab aims to understand the logic of a ladder logic coding using a PLC and the connections for any external hardware (HMIs). For instance, using the PLC and HMIs, and other systems, users are needed to create a system that can be capable of doing a certain amount of cycles in a specific period. Experimental Methods: The lab had different days of experiments. On one day of the lab experiment, the user was taught to understand the typical uses and benefits when using a programmable logic controller (PLC) and a Human-machine interface (HMIs). During the first day of the experiment, students were taught how to do a write and operate fundamental ladder logic codes and functions when writing the code. Furthermore, users were informed and wrote inputs such as contacts and outputs like coils on a PLC in their ladder logic code. They used the ladder logic code to make a light stack flash the color green for 10 seconds. In the second portion of the experiment, the user should be able to write their test plan to perform characteristics when writing a ladder logic code to provide a solution to the test problem asked on creating a cycle capable of running 2,700 process cycles in one 24-hour period. Students used the PLC, HMIs, Light Stacks, DC Motor, and a Photoelectric Sensor in the second experiment.

2 They used their ladder logic codes to make the HMIs have a command to turn on the light stack and provide permission to the DC motor to turn and use the photoelectric sensor. The desired outcome was to have the system process initially 10 seconds to warm up and display a green light in the warm-up stage. After the warm-up process is complete, a yellow light will appear, letting the user press the start button on the HMI to start the operation of the DC motor, and the Photoelectric sensor will count ten revolutions and complete the process. Experimental Results: The first experiment was performed with a PLC (Programmable Logic Controller), HMIs (Human-machine Interface) and a light stack.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

3 The second experiment had a PLC (Programmable Logic Controller), HMIs (Human-machine Interface), Light Stacks, DC Motor, and a Photelectric Sensor and created their own ladder logic codes

4 Table 1 : PLC Day 2 Results Number of Cycles Cycle Time (s) 1 21.82 2 22.41 3 21.74 4 21.97 5 21.80 6 23.04 7 21.63 8 21.35 9 21.86 10 21.23 11 22.25 12 21.78 13 21.46 14 22.11 15 21.5 Table 2 : PLC Day 2 Results Standard Deviation 0.4590 Mean 21.86 s

5 Cycle Time 23 hr Lunch Break. 30 min Personal Break 20 min Motor Run Time 10 min % 99 99 % Analytical Methods: The PLC (Programmable Logic Controller) uses a variety of other components such as the HMIs (Human-machine Interface), a DC Motor, a Stack Light, and a Photoelectric Sensor. On the second day of the experiment, the students were to calculate the process to execute a 2.700 cycle process in one 24-hour period. The first part in order to calculate the process the mean of the data set is needed to start: μ = ∑ of theterms number of terms (1) Finding the standard deviation is needed to measure the variation of the data. σ = √ ∑ ( x i − μ ) 2 N (2) The cycle time is another important factor to calculate the process cycle. CycleTime =( μ + 3 )∗( σ ) (3) At last calculating the 99% confidence level is important to see if it is possible or not. N 99% = available produce operatingtime ( μ + 3 )∗( σ ) (4) Discussion of Findings: The PLC (Programmable Logic Controller) is an excellent way for industries to operate industrial applications. Using the ladder logic code is a way to allow the PLC to store

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

6 instructions and do functions in the industry. The ladder logic is a way of programming the PLC by having input to achieve the desired output while using a rung. A rung is a logical operator implied in the programming to help accomplish the output through timers, counters, and other forms. The ladder logic allows it to run its cycle from the first input to the PLC and the HMIs to achieve the desired output and will continually repeat until the program is told to stop. During this experiment, the user needed to find out a test plan to achieve the desired output was required to determine whether 2,700 cycles could be completed. The test plan used was to calculate and record one whole process run 15 times. After calculating one cycle 15 times next was calculating the mean of the data set and the standard deviation to find the variations. Critical factors in the test plan for the 24-hour workday period were to key in every break/production time, such as how it would take 30-minutes to take a lunch break, a 10-minute production startup time, and a 20-minute person break per cycle. After finding the desired test plan, next was calculating to see if 2700 cycles could be completed or not. Using the test plan at 99% confidence, the only cycles that the user was able to be completed were 2300 cycles, so a new test plan would be needed to be able to calculate 2700 cycles. A new test plan that uses a new programming code and a new way to give the workers enough breaks and still work in a typical work period would be needed to get the desired 2700 cycles. Conclusion: In this lab, two experiments were performed to determine if 2700 cycles could be completed in 24 hours. Additionally, the other purpose of the lab was to understand the ladder logic code used when using a PLC (Programmable Logic Controller) and see how a PLC and an HMIs (Human- machine Interface) connect to get the desired outcome. The PLC was used to set inputs and grab

7 the desired outputs. While conjointly, understand the connections used with a Programmable Logic Controller.