Hey there! As a supplier of Siemens VFDs (Variable Frequency Drives), I often get asked about how to set the frequency jump function. It's an important feature that can prevent your equipment from operating at certain frequencies where resonance or other issues might occur. In this blog post, I'll walk you through the process step by step.
First off, let's understand what the frequency jump function is all about. Sometimes, mechanical systems have natural frequencies at which they vibrate more intensely. If your VFD runs the motor at these frequencies for an extended period, it can lead to excessive wear and tear, noise, and even damage to the equipment. The frequency jump function allows you to specify a range of frequencies that the VFD will skip over, so your motor doesn't operate at those troublesome frequencies.
Step 1: Know Your VFD Model
There are different models of Siemens VFDs, and the steps to set the frequency jump function might vary a bit. For example, we have the Siemens 6SL3120 - 1TE23 - 0AA4 and the Siemens 6SL3130 - 6TE23 - 6AA3. And one of the popular ones is the SINAMICS G120 Frequency Converter. You need to refer to the user manual of your specific VFD model to get the exact details. But don't worry, the general concepts are pretty similar across models.
Step 2: Access the Parameter Menu
To set the frequency jump function, you'll need to access the parameter menu of your VFD. Usually, there's a keypad or a display on the VFD itself. Press the appropriate buttons to enter the parameter setting mode. On some models, you might have to enter a password to access certain advanced parameters. If you're not sure about the password or the button sequence, check the user manual.
Step 3: Find the Frequency Jump Parameters
Once you're in the parameter menu, you need to find the parameters related to frequency jump. The naming of these parameters can vary, but they often have something like "Frequency Jump" or "Skip Frequency" in their names. For example, in some VFDs, you might find parameters like P1091, P1092, etc., which are used to set the lower and upper limits of the frequency jump ranges.
Step 4: Determine the Troublesome Frequencies
Before you start setting the parameters, you need to figure out which frequencies are causing problems. This might require some testing or analysis of your mechanical system. You can use vibration sensors or other monitoring equipment to identify the frequencies at which excessive vibration occurs. Once you know these frequencies, you can set the frequency jump ranges accordingly.
Step 5: Set the Frequency Jump Ranges
Let's say you've determined that the troublesome frequencies are between 20 Hz and 25 Hz. You'll need to set the lower limit (P1091, for example) to 20 Hz and the upper limit (P1092) to 25 Hz. Some VFDs allow you to set multiple frequency jump ranges. If you have more than one range of troublesome frequencies, you can repeat the process for each range.
Step 6: Save the Settings
After you've set the frequency jump ranges, make sure to save the settings. Usually, there's a "Save" or "Confirm" button on the keypad. Press this button to save the changes you've made to the parameters. The VFD will then use these settings to skip over the specified frequency ranges during normal operation.
Step 7: Test the Settings
Once you've saved the settings, it's a good idea to test them. Start the VFD and let it run through its normal operating range. Observe the motor and the mechanical system to make sure that the VFD is indeed skipping over the specified frequency ranges. If you notice any issues or if the vibration problem still persists, you might need to adjust the frequency jump ranges.
Tips and Tricks
- Be Precise: When setting the frequency jump ranges, be as precise as possible. A small error in setting the limits might not effectively avoid the troublesome frequencies.
- Keep Records: It's a good idea to keep a record of the frequency jump settings you've made. This will come in handy if you need to make changes in the future or if you have to troubleshoot any issues.
- Consult an Expert: If you're not confident in setting the frequency jump function on your own, don't hesitate to consult an expert. We, as a Siemens VFD supplier, have a team of experienced technicians who can help you with the setup.
Conclusion
Setting the frequency jump function of a Siemens VFD is an important step to ensure the smooth and reliable operation of your equipment. By following the steps outlined in this blog post, you should be able to set the frequency jump ranges for your VFD. Remember, if you have any questions or need further assistance, feel free to reach out to us. We're here to help you get the most out of your Siemens VFD.
If you're in the market for a Siemens VFD or need to replace an existing one, we're your go - to supplier. We offer a wide range of Siemens VFD models, including the ones mentioned above. Our prices are competitive, and we provide excellent after - sales service. Contact us today to start a procurement discussion, and let's find the perfect VFD solution for your needs.
References
- Siemens VFD User Manuals
- Technical Documentation on Variable Frequency Drives
