请教高手cs3000程序的两个问题? 简略查了sio-21,sio-21: switch instrument block with 2 inputs, 1 output.2个inputs应是: in:answerback input terminal 4楼仁兄说得对:第一个的地址写在通道里就行,系统会自动的读到第二个di,一般组态都是只连接一个。" 引自: im 33s01b30-01e d3-176 *1: n in the table indicates the connection destination element of the open answerback signal specified to the answerback input terminal. n+1 is the connection destination lement of the close answerback signal, indicating the next element that follows the element specified to n.查看更多