Thanks for your answer.
"Did you read the datasheet?"Yes ,I did :)
The ADC1286 chip has not pure SPI,but ADS1286 transmits data identically like SPI SLAVE.
Ok. I found buggs.:)Source Vref was defect.
Now all is ok.Like your example ,I use Delphi program to data transfer from ADS1286 via LPT.


Thanks
Darek