2012/3/29 Viesturs Lācis <viesturs.la...@gmail.com>:
>
> It is past 9 PM, so I will try to run LinuxCNC with 8i20
> attached tomorrow morning once more.

Peter, today I tried again and the result is the same as before -
"fault" led is turned on and I do not see 8i20 in "Show HAL config"
under Pins -> hm2_7i43 -> 0.

I have:
1) +55 VDC applied to motor power;
2) +12 VDC applied to "enable" input;
3) checked the cable between 7i43 to 8i20 again (including the ttl
<--> rs422 converter in the middle) - all the wire leads match the
firmware pinout, SN75179 pinout and 8i20 serial port pinout

I do not have motor attached.

There are 5 LEDs turned on:
1) PWR
2) LV STATUS
3) ISO PWR
4) HW ON
5) FAULT

The only LED that is not turned on is STATUS.

Are there any testing tools that I could try out to find, why does not
LinuxCNC receive any response from 8i20 drive?

Viesturs

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