D/S Three Channel (Module 6*)68C3 Operations Manual North Atlantic Industries, Inc. 12/19/2014Rev: 2014-12-19-0947 www.naii.com Page 241 of 330D/S Ratio 1/2Set desired ratio between coarse (channel 1) and fine (channel 2) channels. Enter the desired ratio, as an integernumber, in the D/S Ratio Register corresponding to the pair of channels to be used as a two-speed channel.Example: Single speed = 1; 36:1 = integer 36. (Ratio range from 1 to 255). By entering a ratio in the D/S Ratio 1/2register, the fine (channel 2) channel will automatically output a signal proportional to the programmed coarsechannel times the ratio programmed.D/S Output ModeThe D/S Output Mode register is utilized for selecting either ratio-metric or absolute (fixed) mode voltages. Ratio-metric Mode, when selected, will cause the output signal voltage of the channel to vary with the input ReferenceVoltage. Fixed Mode, when selected, will cause the output signal voltage of the channel NOT to vary with theinput Reference Voltage. Set corresponding channel bit to “0” for Ratio-metric Mode. Set corresponding channelbit to “1” for Fixed Mode.D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0D/S Output Mode X X X X X X X X X X X X X CH3 CH2 CH1D/S Synchro / Resolver SelectWhen required, write a “11” or “00” (Synchro = 11; Resolver = 00) to each corresponding channel bit pair,representing a channel commanded output format, of the Synchro/Resolver Register.D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5D4CH2D2CH1D0D/S Synchro / Resolver Select X X X X X X X X X X D4 D5 D3 D2 D1 D0D/S Trigger Source SelectInternal = “0x29”; External = “0x28”D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0Trigger Source Select X X X X X X X X X X D X D X X DD/S Trigger Slope SelectFor positive slope, set the corresponding channel bit to "0" in the Trigger Slope Select Mode Register. Fornegative slope, set the bit to “1”.D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0Trigger Slope Select X X X X X X X X X X D X D X X D
