Modbus-RTU control of a MOLLUM VFD

I got a Mollum VFD .  This is one of the smallest VFDs on the market.  Nice when trying to pack everything in a box.  I think it is the same as the BD600 series  that StepperOnline sells.  Box is the same size, and the manuals look identical.  

I'm attaching the HAL file I created to allow LinuxCNC to talk to it.  
   


My custom_postgui.hal contains,

#set up the spindle monitor with pyvcp
loadrt scale names=scale_torque,scale_power,scale_current,scale_bus_voltage,scale_freq
addf scale_torque servo-thread
addf scale_power servo-thread
addf scale_current servo-thread
addf scale_freq servo-thread

setp scale_torque.gain .01
net torque_scale scale_torque.in mb2hal.torque.torque.float
net torque scale_torque.out => pyvcp.torque

setp scale_power.gain .1
net power_scale scale_power.in mb2hal.power.power.float
net power scale_power.out => pyvcp.motor_power

setp scale_current.gain .01
net current_scale scale_current.in mb2hal.current.current.float
net current scale_current.out => pyvcp.current

#voltage doesn't need scaling
net voltage  mb2hal.voltage.voltage.float => pyvcp.voltage

setp scale_bus_voltage.gain .1
net bus_voltage_scale scale_bus_voltage.in mb2hal.bus_voltage.bus_voltage.float
#net bus_voltage scale_bus_voltage.out => pyvcp.bus_voltage

setp scale_freq.gain .1
net freq_scale scale_freq.in mb2hal.freq.freq.float
#net freq scale_freq.out => pyvcp.freq

#fault messages don't need scaling
net vfd_fault mb2hal.fault.fault.int => pyvcp.fault