Hello everyone, I am currently in the process of upgrading my machinery by replacing MRJ2 (Mitsubishi) series servo drives with MRJ4 servo drives for two axes. I have utilized the conversion kit provided by Mitsubishi, but upon powering up, I am encountering an "20.1" error on both drives, indicating an encoder error as per the user manual. Despite my attempts to troubleshoot by inspecting the encoder wiring and adjusting parameters like "PC04" (transitioning from a two-wire to four-wire encoder), the issue persists. Upon further inspection, I noticed that the "PG" and "N" points at the encoder terminals lack the expected 5V power supply required to activate the encoder. This leads me to believe that the drives may be defective, causing the lack of 5V generation for the encoder. It raises confusion as to why both brand-new drives are experiencing the same issue. I am currently at a standstill and seeking assistance. Are there specific parameters that need adjusting to activate the 5V supply at these terminals? Your help is greatly appreciated.
The MRJ2 and MRJ4 models offer varying resolutions, therefore requiring individual configuration settings.
In order to properly configure the MRJ2 and MRJ4, it's important to note that they have different resolutions. This will require some adjustments to be made. Can you please provide guidance on the specific parameters that need to be checked? Also, what should be done in case the 5V is missing? Your insights are greatly appreciated.
The "Transition from MELSERVO-J2-Super/J2M Series to J4 Series Handbook" (L(NA)03093-D) from Mitsubishi is a comprehensive guide with 654 pages that thoroughly documents the transition process. The handbook includes a detailed flowchart outlining the replacement procedures, making it easy to follow and implement. Don't hesitate to consult this valuable resource for a smooth transition to the J4 Series.
Hey there, it's surely frustrating when brand-new equipment doesn't cooperate as expected. Before considering the drives as defective, I'd suggest checking the setup of the drives again meticulously, especially the encoder parameters. I remember facing a similar challenge, and it turned out that I had mixed up some parameters during the set-up. If the encoder isn’t receiving the voltage, you might want to cross check the encoder power source configuration in the parameter settings. Also, don't forget to ensure that the position detector option on the drive configuration is correctly set, as that might cause power supply issues as well. If after diligently following these steps the problem still persists, perhaps you should contact the Mitsubishi support service for troubleshooting - it's possible you might have gotten faulty equipment, as rare as that is. Good luck!
It's quite unusual for both the brand-new drives to have the same defect, so it might be something else. While "PC04" is indeed a key parameter to adjust when transitioning between encoder types, it may not be the only one. It's possible that the PG interface of your MR-J4 drive isn't getting enough power due to incorrect configuration in other parameters. Check your machine manual for details on all encoder-related parameters; there might be something you're missing. Alternatively, your conversion kit may be missing a vital component that delivers power to those points, so I would suggest checking that as well. Good luck troubleshooting!
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Answer: - The "20.1" error code indicates an encoder error, as specified in the user manual.
Answer: - You can start by inspecting the encoder wiring and adjusting relevant parameters, such as transitioning from a two-wire to four-wire encoder (e.g., adjusting "PC04").
Answer: - This issue could be due to potential defects in the drives, causing the lack of 5V generation for the encoder.
Answer: - If both brand-new drives are showing the same problem, it could indicate a common issue related to the drives themselves rather than installation or configuration errors.
Answer: - While adjusting parameters like "PC04" can be helpful, if the issue persists, it may require further troubleshooting or contacting Mitsubishi technical support for guidance.
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