Posted 11 Feb 2022 (edited) Dear all, I have an Omron inverter 3G3TC-AB004, which apparently there is not much information about it online. I have successfully connected this inverter with Modbus, and able to change some of its parameters from Modbus Poll, yet I still haven't found the address for the Start and Speed Command. I've tried to set the frequency from modbus but unfortunately it's a read only register. Is it possible to control this inverter from modbus or it's only useful for monitoring the inverter status? Thanks in advance. Edited 11 Feb 2022 by too_high Share this post Link to post Share on other sites
Posted 16 Jul 2022 With Modbus Poll try f4 instead of f3. F3 = function 3. f4 = function 4. Try with f4, which should let you write to the registers one by one, until you find what you need. I hope I helped and that you find what you need. Share this post Link to post Share on other sites