232双机通信，主机一上电主机显示6个8点，并打印机打印中国传媒大学英文名字，按S1键显示电压值，转动按钮变动电压值，显示屏显示相应电压值，按S2键打印当前电压值。从机一上电显示6个8点，并和主机保持电压值一致-Display 232 pairs of computer communication, host a power-host 6 8:00, and the printer to print the English name of the Communication University