Hello, everyone! I'm currently working with a PLC FX1N and I'm looking to utilize the PWM (Pulse Width Modulation) feature to generate PWM signals. I have a 24V input voltage and I aim to achieve an output voltage ranging from 0 to 4V. Despite following the manual step by step, I encountered issues and it didn't function as expected. Could someone please guide me on how to resolve this problem? Thank you very much for your assistance!
To better assist you with your application, we require additional details. Specifically, how does the 24V input correlate with the desired 0-4V output? I've found a few valuable discussions regarding the PWM instruction for the FX1N that may provide helpful insights. You can check them out here: 1. [PWM Instruction Discussion on PLC Talk](http://www.plctalk.net/qanda/showthread.php?t=15628) 2. [FX1N PWM Topic on MrPLC Forums](http://forums.mrplc.com/index.php?/topic/217-pwm-on-fx1n/) Best regards,
gclshortt stated: We require additional details regarding your application. Specifically, if the input voltage is 24V, how does this correlate with the desired 0-4V output? Below are a couple of links that discuss the PWM (Pulse Width Modulation) instruction in the FX1N series: http://www.plctalk.net/qanda/showthread.php?t=15628 http://forums.mrplc.com/index.php?/topic/217-pwm-on-fx1n/ Thank you for your attention to this matter. I would like to fine-tune the output by adjusting the duty cycle. For instance, I intend for the output to be 4V when the duty cycle is set to approximately 16%. Conversely, when the duty cycle reaches 100%, the output should be 24V. I believe that employing PWM can effectively modify the output voltage. Can you provide assistance with this?
PWM, or Pulse Width Modulation, is a technique used for regulating power by controlling the duration that the output remains ON compared to the entire cycle time. For instance, if the pulse duration is 20 milliseconds, with the output being ON for 10 milliseconds and OFF for the remaining 10 milliseconds, the resulting power output will be 50%. It’s important to note that a digital output operates in two states—either OFF or ON, represented as 0 or 24V when utilizing a 24VDC power source. To achieve a variable voltage output, you will need an analog output in your Programmable Logic Controller (PLC).
After reviewing the manual, I discovered that it indicates the use of PWM (Pulse Width Modulation) commands to generate PWM signals from the outputs Y0 and Y1. Interestingly, it does not mention the need for any extra analog module, which has left me a bit puzzled.
To leverage the capabilities of the PWM function (FNC58), please refer to page 5-80 of this manual for detailed instructions. For additional insights, visit this link: https://www.google.com/url?sa=t&sou...FjAAegQIBxAB&usg=AOvVaw3Hhz9I97SDrpQfNxGp3xtu.
Hey! It sounds like you’re on the right track with your PLC, but PWM can be tricky sometimes. One common issue could be the setup of your timer; make sure it's configured correctly for your desired frequency. Also, double-check your output wiring and ensure that the PWM signal is being properly connected to your load. If you're using an analog output for your 0-4V range, you might need to scale the PWM value accordingly since it typically outputs a duty cycle instead of a direct voltage. Lastly, ensure your grounding is solid, as interference might affect your signal. Let us know how it goes!
Hey there! It sounds like a classic case of PWM configuration issues. Make sure you’re checking the PWM settings in your PLC, especially the frequency and duty cycle parameters, as these can greatly affect your output. Also, if you’re trying to scale the output from 24V to 4V, you might need a resistor divider or an external circuit to accurately drop that voltage. Lastly, double-check your wiring and ensure the output is properly connected to avoid any unexpected behavior. Hope that helps, and good luck with your project!
✅ Work Order Management
✅ Asset Tracking
✅ Preventive Maintenance
✅ Inspection Report
We have received your information. We will share Schedule Demo details on your Mail Id.
Join hundreds of satisfied customers who have transformed their maintenance processes.
Sign up today and start optimizing your workflow.