功能： 1、作为下位机采集8255数据并将此数据通过通讯送出，传输十路 2、采集数据为BCD，不处理后 3、通讯采用方式一-Features: 1, as under the 8255-bit machine data collection and data communications sent through the transmission path 2, 10, collecting data for the BCD, not after 3, means of commun