E3EC HENF315125R1计数器模块

数据表中的16位包含转换所需的数据。12位的版本被放置在对应于模拟点的16位数据字内（在%AI表中）。Series 90-30 PLC系统以不同的方式处理各种模拟模块的集成。在将数据放入%AI数据表中的字之前，CPU不会处理来自输入通道的数据。%AI数据表中未被输入通道用于转换的位被模拟输入通道强制为0（零）。单极范围内16通道模拟电压输入模块的模拟电流输入数据字的A/D转换器的12个数据位的位置如下所示。X D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 X X MSB LSB X=未转换位模拟值在转换器的范围内缩放。工厂校准将每比特的模拟值（分辨率）调整为满刻度的倍数（即，单极为2.5 mV/比特；双极为5 mV/位）。此校准使正常的12位转换器具有the 16 bits in the data tables contain data required for the conversion. A version of the 12 bits is placed within the 16-bit data word corresponding to the analog point (in the %AI table). The Series 90-30 PLC system handles the integration differently for the various analog modules. The CPU does not manipulate the data from the input channels before placing it within the word in the %AI data table. The bits in the %AI data table which were not used in the conversion by the input channel are forced to 0 (zero) by the analog input channel. Placement of the 12 data bits from the A/D converter for an analog current input data word for the 16-Channel Analog Voltage Input module in unipolar range is shown below. X D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 X X X MSB LSB X=not converted bits Analog values are scaled over the range of the converter. Factory calibration adjusts the analog value per bit (resolution) to a multiple of full scale (that is, 2.5 mV/bit for unipolar; 5 mV/bit for bipolar). This calibration leaves a normal 12-bit converter with