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Toshiba AD268 User Manual
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User’s Manual 45PART 2 DA264 5. I/O Allocation and Programming5.2 D/A conversion dataTo output the desired analog signals from the DA264, simply write the appropriate data into theassigned I/O registers YW(n) to YW(n+3) for the DA264.The data of YW(n) to YW(n+3) are transferred to the DA264 at the T2’s batch I/O processing.Then in the DA264, these D/A conversion data are converted into the analog signals andoutput from the DA264.The I/O register assignment is as follows.YW(n) ........ D/A conversion data for channel 1YW(n+1) .... D/A conversion data for channel 2YW(n+2) .... D/A conversion data for channel 3YW(n+3) .... D/A conversion data for channel 4The conversion data to be written into the YW register is dependent on the output type asfollows.±±±±10V range:D/A conversion dataHexadecimal Integer Output voltage ResolutionUpper limit H7F80 32640 +10.2 V: : :Full scale (positive) H7D00 32000 +10 V: : :H0001 1 +0.3125 mV0 H0000 0 0 VHFFFF -1 -0.3125 mV: : :Full scale (negative) H8300 -32000 -10 V: : :Lower limit H8080 -32640 -10.2 V0.3125 mV / bitA = 0.3125 × DD: Digital dataA: Analog signal (mV)HC000-16384H8000-32768 0H3FFF16383H7FFF32767Analog output value+10VH7D0032000+5.1196V-5.12V-10VH8300-32000Digital dataCTi Automation - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.ctiautomation.net - Email: info@ctiautomation.net |
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