EDIT: After playing around with it for another 4 hours. i found a solution. I updated the bios and the IPMI firmware and it seems to be working now. Thanks to everyone else in the thread who helped get me to this point!
Could someone help me get this working on a supermicro x9dhr-if-nv? I have installed the plugin, and set my ipmi up, which the plugin says it is successfully connected to. I can see all my sensors, including temps and fan speeds in the plugin, however my fan settings section only has an option for which hard drive to poll.