Troubleshooting Communication Issues between FR-D740-036 VFD and FR Configurator 2

Question:

Hello everyone, I hope you're having a great day! I am currently trying to establish a connection between my Mitsubishi VFD model FR-D740_036 and the FR Configurator 2 software. Despite configuring the VFD parameters as per the software's requirements, I am encountering communication hurdles. An observation I made is that the operation mode light does not illuminate after setting Pr551 to 2, as shown in the attached image of my VFD. If anyone has experienced a similar issue or has suggestions on how to troubleshoot it, I would greatly appreciate any assistance. Feel free to share your insights! #VFDTroubleshooting #MitsubishiVFD #AutomationIssues #FRConfiguratorTips

Top Replies

The RJ45 on the FR-D740 is not actually an Ethernet connector, but rather a green RS422 to RS485/422 cable. Your cable resembles a patch cable. For more information and to view the SC-FR-PC CONNECTION CABLE for PC to inverter connectivity, please visit the Mitsubishi Electric Europe e-shop.

@goghieIndeed, you are correct. I am utilizing an Ethernet cable outfitted with RJ45 connectors for RS485 connectivity. Only 4 wires are utilized in this specific Ethernet cable, leaving the rest unconnected on the opposite end (refer to the image). I have successfully established communication with the VFD using both the GOT and Modbus software. However, I am facing difficulty with communication when attempting to connect with the FR configurator on the same PC.

Which port on a PC should you use to connect the cable: USB, Serial, or Ethernet?

Use a USB/Rs485 converter cable to connect devices to your USB port.

Hey there, sounds like you've run into quite a pickle! I had a similar issue with my FR-D740 a while ago. Have you checked if the RS-485 termination resistors are installed both at the VFD and the PC end? If not, you might want to check that, as missing them can disrupt the communication. Also, ensuring your cables are correctly wired and not too long could also be a factor. Keep in mind as well that Pr. 551 should only be set to "2" if you're using the Modbus-RTU protocol. If you're using another protocol via RS-485, you'll need to adjust this setting accordingly. Let me know if you've already checked these things or if this helps! #VFDsolutions

More Replies →

Streamline Your Asset Management
See How Oxmaint Works!!

✅   Work Order Management

✅   Asset Tracking

✅   Preventive Maintenance

✅   Inspection Report

We have received your information. We will share Schedule Demo details on your Mail Id.

To add a comment, please sign in or register if you haven't already..   

Frequently Asked Questions (FAQ)

FAQ: 1. Why is the operation mode light not illuminating on the Mitsubishi VFD model FR-D740-036 after setting Pr551 to 2?

Answer: - The operation mode light not illuminating could indicate a communication issue between the VFD and the FR Configurator 2 software. It is important to troubleshoot this problem to ensure a successful connection.

FAQ: 2. How can I troubleshoot communication issues between the FR-D740-036 VFD and FR Configurator 2 software?

Answer: - Some steps to troubleshoot communication issues include verifying VFD parameters, checking cable connections, ensuring proper software settings, and confirming compatibility between the VFD model and software version.

FAQ: 3. Are there specific settings or configurations required for establishing a connection between the FR-D740-036 VFD and the FR Configurator 2 software?

Answer: - Yes, it is essential to configure the VFD parameters according to the software's requirements. Checking and adjusting settings such as Pr551 can help resolve communication hurdles and establish a successful connection.

FAQ: 4. What should I do if I encounter communication problems between my Mitsubishi VFD and the FR Configurator 2 software?

Answer: - If you are facing communication problems, seeking assistance from others who have experienced similar issues or reaching out to technical support from Mitsubishi or the software provider can help troubleshoot and resolve the problem effectively.

Ready to Simplify Maintenance?

Join hundreds of satisfied customers who have transformed their maintenance processes.
Sign up today and start optimizing your workflow.

Request Demo  â†’