IBM System/7 Functional Characteristics - All about the IBM 1130 ...

.••■• III II III 11111.•■■••11•••■•■■■••■•CONVERTING VOLTAGE TO ANALOG OUTPUT BINARY DATAThe output voltage signal to be established at an analog output point is represented by10 binary bits in a 16-bit data word as shown in Figure E-3.O 1 11 15DataZerosXXXXXXXXXX O0000111111111 111I••■■••,,••■, ••■••••.„,■110., .••••■••.,..1•1.0X X X 0Figure E-3. Analog output data wordThe voltage value represented by each binary bit is shown in Figure E-4. Converting avoltage to its binary equivalent can be accomplished by using the flowchart shown inFigure E-5.BitsVoltagevalue0 1 2 3 4 5 6 7 8 9 10 11 through 15Notused5.12 2.56 1.28 0.640 0.320 0.160 0.080 0.040 0.020 0.010 Not usedNote: All voltage values shown are expressed in volts.Figure E-4. Analog output bit resolutionFor example, converting the voltage 7.225 using the flowchart would result in thefollowing data word:O 1 10 11 150 1 0 1 1 0 1 0010 O00001 1 ill111 11115 A 4 0E-4 GA34-0003