RS485 CNC spindle control

My USB to RS485 adapter just arrived from China.
Will be able to test controlling the CNC spindle from the computer by MACH3 later today! 

(remove tape from taped over keys,
 then press PRGM, enter the number of the value to change via UP,DOWN and <<, pres SET.
 You now see the current value.
 enter a new value via UP,DOWN,<< and press SET to change it.
 The device will leave PRGM mode on it's own after a few seconds)

PD163 "communication address"  1
PD164 "baud rate" 1 = 9600bps
PD165 "communication data method" 3 = 8N1 For RTU4
0=8n1 ASCII gives errors in Mach3 (don't know how because it's a one-way only communication)
3=8n1 RTU4 gives no errors but still the spindle doesn't react
PD001 "source of run commands" 2 = communication port (0=operator)
PD002 "source of operating frequency" 2=communication port (0=operator)
now it should work.

PD144 "rated motor revolutions" default=1440

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