Are you interested in learning how to start and control heavy three-phase electrical motors using the star-delta starter method? Look no further! In this article, we will walk you through the process of programming a PLC to achieve this. We will also test two different programs using a PLC simulator to ensure they work as intended. Let’s dive in!
Contents
Getting Started with PLC Programming
To begin your programming journey, click on the SIMATIC icon on your desktop. In the software environment, the first step is to create a new project. Simply go to the “File” menu and select “New.” Give your project a name and click “OK” to create it.
Next, you need to define the type of S7 PLC you will be using for this project. Click on your project and then select “Insert” followed by “Station.” From the list of available stations, choose the one that matches your PLC. If you have a “S7 300” PLC like the “315-2DP,” select the “SIMATIC 300 Station.”
Defining PLC Modules
Once you have defined your PLC type, it’s time to define the PLC modules within the software. To do this, select “Station” and double click on “Hardware” in the right-side window. Since you have an S7-300 PLC, choose your modules from the “SIMATIC 300” subfolder.
Just like in the actual environment, you need to have a rack in the software to define the PLC modules. To add a rack, open the “Rack 300” folder and double click on “Rail.” Now you have a rack with 11 slots.
The first module you should place on the rack is the power supply. In the software, open the “PS-300” folder and double click on the appropriate power supply module. Place it on the rack just like you did in the actual environment.
Next, it’s time to add the CPU module. Open the “CPU 300” folder and choose the CPU that matches your specific order number. Place it on the rack accordingly. If your CPU has a DP port, an extra “X2” row will be added to your rack.
Adding Input and Output Modules
In the next lesson, you will learn how to add input and output modules to your rack. This step is crucial for connecting external devices to your PLC. Stay tuned for the upcoming lesson where we will guide you through this process.
FAQs
Q: Where can I find more PLC programming lessons?
A: For comprehensive PLC programming lessons and weekly video lessons, check out the Techal website here.
Q: Can I use the star-delta starter method for other types of motors?
A: Yes, the star-delta starter method can be used for various types of motors, including squirrel cage induction motors.
Q: Is programming a PLC a complex task?
A: Programming a PLC may seem daunting at first, but with proper guidance and practice, it becomes easier. Start with simple projects and gradually increase the complexity.
Conclusion
Programming a PLC to control heavy three-phase electrical motors using the star-delta starter method is an essential skill for aspiring technology engineers. By following the steps outlined in this article and utilizing the appropriate software and hardware, you can successfully program your PLC and achieve optimal motor control. Stay tuned for more exciting lessons from Techal!
