Hello Team, I am in need of assistance with an assessment for my Level 3 general engineering course, particularly with the PLC segment. I work in a role with a strong mechanical focus, so I am finding this segment challenging. The question pertains to designing a system for a stirring application in a lemonade factory using LOGO with function block or ladder logic. The system should activate the start 'fill' pump and begin filling the tank when the Start 'push to make' switch is pressed. The system should also utilize pulses from a flow meter to increment a counter, which will indicate when the tank is full or low. This counter can be used as feedback to control the pumps. Once the tank is full, the system should shut off the fill pump, activate the FULL light, start the mixer for 10 seconds, then stop the mixer and start the 'empty' pump. The 'empty' pump should run until the tank is empty, with pulses from another flow meter used to decrement the counter and detect when the tank is empty. Additionally, the system should stop immediately when the stop button is pressed. Testing of the system using the LOGO simulator is required, with 3 print-screens showing the system at different stages. Any assistance with this assessment would be greatly appreciated. If necessary, I can provide my email for further communication. Thank you.
Our forum provides valuable assistance to students with their homework assignments, without crossing the line of completing the work for them. It is important that students grasp the concepts themselves, as they may one day be responsible for programming critical equipment based on their learning. There are no shortcuts when it comes to learning, especially when it involves converting specifications into logical statements and interpreting complex problems. One of the key challenges is transforming the words in the specification into logical statements, which then leads to relatively straightforward programming. Another hurdle is deciphering inconsistencies in the problem itself, such as determining whether the completion of a cycle should trigger another cycle. Understanding the vocabulary and operations available in a programming language is crucial, and the best way to master it is through hands-on experience. By creating a simulation using LOGO! and experimenting with different function blocks like the counter and off-delay timer, one can truly understand how a programming language works. Start by configuring inputs as "Momentary pushbutton (make)" and observe how the function blocks respond when inputs are pressed. This interactive learning approach helps in building a strong foundation in programming language vocabulary. Remember, syntax is important too, but mastering vocabulary is the first step. Press F3 or click the SIM button in the Diagram Editor menu bar to enter Simulation mode and start exploring the functions in action.
The information I have received is limited, which is why I am seeking assistance. I need screenshots to help me cross-reference and fully comprehend the answer. I am not looking to simply copy the information provided.
TOMENGLAND emphasized that the information shared is crucial for receiving assistance. Screenshots are needed for cross-referencing and understanding the answer, not just for copying. And oh, don't forget to check out the image provided!
Most PLC programs aim to replicate real-world scenarios with varying levels of accuracy. The main consideration is the fidelity of the model used. For this particular program, there are two primary inputs: the start button and the stop button. Additional inputs include the low and high level indicators, as well as the flowmeter pulses, although these will be simulated within the program for the purposes of this exercise. Simulating the tank level involves a simple conceptual model where the level increases if the 'fill' pump is active and decreases if the 'empty' pump is active. The level remains constant if neither pump is running. The program also accounts for high and low level switches, triggering specific actions when the level reaches certain thresholds. In this assignment, an Up/Down counter is utilized to simulate the tank level behavior. The counter tracks the level based on the status of the 'fill' and 'empty' pumps, incrementing when the 'fill' pump is on and decrementing when the 'empty' pump is on. Additional logic is implemented to ensure the counter behaves accordingly. The operational model outlines the conditions under which certain actions should be taken, such as running the 'fill' pump when the level output is 0 and triggering an Off-Delay timer when the level transitions from 0 to 1. The timer controls the operation of the mixer, while the 'empty' pump is activated when the level output is 1 and the timer output is 0. Pressing the stop button halts all operations. To implement this logic, various blocks like AND, OR, and Edge are interconnected with the Up/Down counter to achieve the desired functionality effectively.
The key takeaway here is that we have created a model that accurately reflects the behavior outlined in the assignment using the function blocks provided by the LOGO! FBD language. It's worth noting that I likely approached this by first identifying the key transition points (start => fill; full => time/mix; timer expiry => empty) and then added in additional details, such as simulating the level using the counter, later on. This methodology is similar to calculating the necessary thickness of tank walls by considering the maximum expected level and fluid density. By breaking down the problem into smaller components and addressing them individually, we are able to effectively solve the larger issue at hand. The diagrams you created were incredibly helpful as they clearly outlined the inputs and outputs of the model, ensuring that we stay focused on the task at hand without getting sidetracked by irrelevant details. Additionally, don't forget that there are also indicator lights that need to be programmed. It's important to note that the level-simulating counter output cannot be used for the "full" indicator light (Q2) due to it remaining at a value of 1 from level 10 (full) all the way down to level 1 (not full). Be sure to explore other available options for this indicator light.
Hi there! It seems like you're looking to design a nice sequence-based process control using PLC. Key processes in your case would include filling the tank, mixing the lemonade, and then emptying the system. Firstly, you will need to begin by programming 'start' and 'stop' switches using latching logic. This latching logic, once initiated, "remembers" its previously set/reset state, continuing the process until the stop button is pressed. The next steps are to handle the filling and empting processes, for which you would use a counter function block. Inputs from the flowmeter can be utilized as increment and decrement signals for the counter. When a pre-set limit (which corresponds to the volume of the tank) is reached, you can set up the PLC to trigger the 'tank full' indicator, stop the 'fill' pump, and start the mixer. The mixing process can be executed using simple timer functions, and triggering the 'empty' pump is much like the fill process, just in reverse. As for testing using the LOGO simulator, it sounds like they want three snapshots: one in the filling stage, second showing full/mixing stage, and third with the tank in the process of emptying. This should give you a good starting point, but feel free to provide your email for further assistance if this summary isn't comprehensive for you. Good luck with your assessment!
✅ Work Order Management
✅ Asset Tracking
✅ Preventive Maintenance
✅ Inspection Report
We have received your information. We will share Schedule Demo details on your Mail Id.
Answer: - To design such a system, you need to consider activating the fill pump, monitoring the tank level using a flow meter, controlling the mixer, and managing the emptying process with an 'empty' pump. Utilize function blocks or ladder logic to sequence these actions effectively.
Answer: - You can increment the counter using pulses from a flow meter when filling the tank and decrement the counter based on pulses from another flow meter during the emptying process. This feedback can help control the pumps accordingly.
Answer: - After the tank is full, the system should shut off the fill pump, activate the FULL light, start the mixer for 10 seconds, then stop the mixer and start the 'empty' pump to empty the tank while monitoring the tank level.
Answer: - Implement a stop button in the system that, when pressed, will immediately halt all processes and functions. This safety feature ensures prompt system shutdown when needed.
Join hundreds of satisfied customers who have transformed their maintenance processes.
Sign up today and start optimizing your workflow.