I am currently developing a software program for PC that interfaces with a Mitsubishi E800 inverter using Modbus over Ethernet (Modbus/TCP) for efficient communication. The FR Configurator 2 software, which is utilized to configure the inverter, includes a batch monitor function with 58 different selectable readings for monitoring and display. These readings are precisely the data points I aim to extract in my PC software. However, it is unclear how these readings are calculated within the software. Ideally, I am looking for a consecutive bank of Modbus holding registers that can be easily accessed in one read operation. Despite reviewing the Modbus register documentation, I have not come across a simple solution like "Output frequency" as seen in the FR Configurator 2 software. It seems that the registers store more complex data, lacking straightforward readings like the one mentioned.
If my memory serves me correctly, the PR numbers range from PR0-999, corresponding to registers 41000 to 41999. I am unsure which registers are for reading or read/write functions. I came across a manual for the Mitsubishi Electric FR-E800 that seems to be more reliable than the one on the Mitsubishi website, which appears to be corrupted with missing data. The FR-E800 instruction manual for communication can be viewed and downloaded here. Additionally, a slightly improved version of the manual can be found at the following link: https://eu-assets.contentstack.com/v3/assets/blt5412ff9af9aef77f/blt0b885f651034bc7e/6172b5b657efba120b414818/c982ca47-18ee-11eb-901c-b8ca3a62a094_ib0600871engd.pdf
Hello, thank you for your response. Apologies for the confusion earlier. I am actually referring to a Mitsubishi A840 inverter. I received assistance from a Mitsubishi representative, but even with the manual, I struggled to locate the section detailing the registers I needed. However, it can be found on page 447 of the "FR-A800 instruction manual (detailed)". There is a set of 58 registers starting at address 40201 in the holding registers. This information was helpful and resolved my issue. Thank you for your assistance.
It sounds like you're doing some pretty exciting work! One thing that may help is taking into consideration how Modbus protocol works. Yes, usually the register documentation should be your key to unpacking what each register contains. However, sometimes, variables like "Output frequency" may not be recorded in one single register. They may actually be calculated on-the-fly from a combination of different registers. I would suggest you observe the transactions while FR Configurator 2 is running and use a Modbus tester/sniffer to understand how the values are being calculated. It might not be as straightforward as direct reading from the register, but a blend of read operations, calculations, or even conditional statements. It might require a bit more leg work and exploration on your end, but it should help get you on the right track.
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Answer: Answer: To extract specific data points from the inverter, you can utilize Modbus over Ethernet (Modbus/TCP) communication protocol. You can refer to the FR Configurator 2 software's batch monitor function, which offers 58 different selectable readings for monitoring and display.
Answer: Answer: While reviewing the Modbus register documentation, it may not be straightforward to find a consecutive bank of registers that directly correspond to the data points displayed in the FR Configurator 2 software. The data stored in the registers might be more complex and not as simple as the readings provided in the software.
Answer: Answer: Extracting detailed information like "Output frequency" from the inverter using Modbus registers may require understanding the specific register mappings and data structures used by the inverter. It is essential to explore the documentation provided by Mitsubishi for the Modbus communication setup and data interpretation.
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