What does the expression andnot mean in Kunlun normal touch screen?

In the expression of Kunlun normal touch screen, and not are communication state channels. According to relevant public information, the first channel of all non-card ka-type equipment in MCGS of Kunlun Normal University is the communication status channel, which is called andnot. The andnot instruction is used for B contacts connected in series, and cannot be directly connected to the bus or used at the beginning of a circuit block. Touch screen, also known as touch screen and touch panel, is an inductive liquid crystal display device that can receive input signals such as contact. When touching the graphic buttons on the screen, the tactile feedback system on the screen can drive various connecting devices according to the pre-programmed program, which can be used to replace the mechanical button panel and create vivid audio-visual effects with the help of the LCD screen.