Paper Roll Rotary Sheeting Machine applies the advanced technical of Germany and England. The machine computer control system applies Servo motor and AC transducer which are both international of top brand. The conveyer belt applies NITTA from Japan. The pneumatic vibrator applies FINDEVA from Switzerland. The electrical system adopts SCHNEIDER & OMRON, the speed of cutting paper is so fast and stable. Germany precise bearing and cutting knife assure the high cutting precision. The touch screen makes the operation easy. The anti-curve rack assures the paper flat. This machine is the paper processing machine which is very popular in the paper making and printing industry. It can improve the efficiency and benefit of your work.
Input sampling stage
During the input sampling phase, the PLC controller sequentially reads all input states and data in a scan mode and stores them in the corresponding cells in the I/O map area. After the input sampling is finished, it is transferred to the user program execution and output refresh phase. In these two phases, the status and data of the corresponding unit in the I/O map area does not change even if the input status and data change. Therefore, if the input is a pulse signal, the width of the pulse signal must be greater than one scan period to ensure that the input can be read in any case.
User program execution phase
During the user program execution phase, the PLC controller always scans the user program (ladder) in order from top to bottom. When scanning each ladder diagram, the control lines formed by the contacts on the left side of the ladder diagram are always scanned first, and the control lines formed by the contacts are logically operated in the order of first left, then right, first up and then down. And then refreshing the state of the corresponding bit of the logic coil in the system RAM storage area according to the result of the logic operation; or refreshing the state of the corresponding bit of the output coil in the I/O map area; or determining whether to execute the ladder diagram Special function instructions specified.
During the execution of the user program, only the status and data of the input point in the I/O map area will not change, while the status of other output points and soft devices in the I/O map area or system RAM storage area and The data is subject to change, and the ladder diagrams listed above, the program execution results will work on the ladder diagrams that use these coils or data below; on the contrary, the ladder diagrams below are refreshed. The state or data of the logic coil can only be applied to the program that is listed above in the next scan cycle.