Hi Dan,
Unfortunately it does not seem to work with my Bosch VFD. Did a quick test and nothing is happening.
My settings were:
Port 6, 115200, 8N1
Sact: 20000
Single register 32513 for RPM settings
Single register 32512 for run settings
CW: 129
CCW 133
Stop 136
Exception if CW/CCW/Stop commands entered with three digits only. This is not nice but it is only a nuisance since it seems to be OK if four digits are used. Anyway, it is not working at all with my VFD. I don't know why, and it isn't very important, so don't spend time on this for me since I am happy with the Modbus plugin which is provided by CNC Drive, which is well tested and working without any issues. Nothing is happening, no communication at all. Note that I am using an Ethernet - RS485 com port, so it is a virtual serial port but the same port works well with both Mach3 and UCCNC if I use the built in features of those software. Like I said, don't spend time on this for me, this is just for information. Sorry for not being able to do more debugging. The manual is available on-line, but if you are interested you can download it here:
Media Directory - Media Directory
The document to download is: R912005854