I am trying to communicate with a VFD over Modbus RTU.
Using Modscan with a USB-Serial adapter and my laptop as master, I am able to view this register:
However, when I try to do this in Node-Red using the groov Epic and CSERI-4, I get error
“Error: Modbus exception 2: Illegal data address (register not supported by device)”
I have made sure that the VFD has the right communication settings and that the polarity is correct.
Modbus Node Settings:
Anyone have any suggestions?
EDIT: here is the manual for VFD I am trying to poll https://files.danfoss.com/download/Drives/MG18B522.pdf