While we are on useful tools for Modbus, this is excellent for setting the int16 entry needed to get the correct int32 output. The Node-red Modbus nodes are programmed by someone with a fixed outlook who does not understand or want to help people who need int32 or uint32 registers and his nodes are int16 only. If you make a request for an int32 node he shuts it down.
https://cryptii.com/pipes/integer-converter, so to get my Solar-log to see 3001207464 as the uint32 output from 2 int16 registers I need to enter 45794 in 1 register and 51880 in the second.
Pylon US3000C, SMA and Eltek Can Bus
Re: Pylon US3000C, SMA and Eltek Can Bus
Thank you, To be honest I've never used Modbus before so it's a big learning curve for me. I so much prefer CAN. 

85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 135kWh Rolls batteries, 52kWh Growatt storage GBLI 6532, 66kWh Pylontech US3000C, 43kWh DIY, Sofar ME3000's, Brosley wood burner and 250lt DHW