I am using a Hitachi x200 VFD and I have a brain set up that controls the direction and speed of the spindle. I would like to read the RPM of the spindle and display it in Mach 3. I did not write the brain I have and know little about Modbus. I would be glad to purchase a plugin if available. Does anyone know of a plugin or can you point me in the direction regarding how I modify the setup to read back the RPM?