1766-RM001A-EN-P MicroLogix 1400 Programmable Controllers ...

32 I/O ConfigurationConverting Analog DataThe analog input circuits are able to monitor voltage signals and convertthem to digital data. There are five terminals assigned to the inputchannels that provide four voltage inputs, and a return signal (commons).The following table shows sample Analog Signal and Data Word valuesusing the nominal transfer function formula:N=Vin x 4095/10 where Vin (analog signal) is in volts (V)Converting Analog Input DataAnalog to data word conversionAnalog SignalData Word0V 05V 204810V 4095Analog inputs convert voltage signals into 12-bit values. To determine anapproximate voltage that an input value represents, use the equationshown.-----------10V× inputvalue = inputvoltage( V)4095For example, if an input value of 1200 is in the input image, the calculatedvalue is as follows:-----------10V× 1200 = 2.9304( V)4095Analog OutputsThe MicroLogix 1400 -L32BWAA, -L32AWAA, and -L32BXBA support2-channel, 12-bit resolution analog output. These channels have 0…10VDC output range. Output words 4 and 5 contain the value of analogoutputs (Word 4 : analog output channel 0, Word 5 : analog outputchannel 1).Publication 1766-RM001A-EN-P - October 2008