The Application And Study Of The Full-automatic Rroduct Line Of Sticks Bottom Bag-making Machine Control Based On Programmable Logic Controller

This article in the analysis sticks bottom bag-making machine technique of production and in automatically the control request foundation, in view of PLC in industry automatic control characteristic, the main contents of this thesis for the characteristics of sticks bottom bag-making machine are as follows:1. Analyze the sticks bottom bag-making machine main parameter and the technical process. Key carries on the comparison to PLC with other industrial control system. Obtain PLC to sticks bottom bag-making machine automatic control's superiority, selectivity sticks bottom bag-making machine control system.2. Introduction common protective measures: overload protection, interlock protection, short circuit protection, malfunction alert, and so on, in the sticks bottom bag-making machine control system's processing method and principle. Carry on the comparative analysis to over-load protection's processing method and principle. Obtain sticks bottom bag-making machine control system to realize the way about over-load protection. Study two kinds realize the way about interlock protection. How sticks bottom bag-making machine control system's interlock protection to realize and carry on the choice.3. To fuse's principle of work and protection feature, commonly used fuse's type and technical data carry on analysis. Carry on theoretical analysis to fuse selection principle, reasonable choice sticks bottom bag-making machine control system to short-circuit protection part. Carry on analysis and research to sticks bottom bag-making machine malfunction alert system, give the control circuit.4. To the electro-optical switch, the counter, the temperature sensor, the pressure sensor, the fluid position sensor, and so on, in the sticks bottom bag-making machine control system which involve commonly used sensor's principle of work and the control mode carry on analysis. Give five kinds of sensor's control circuit about sticks bottom bag-making machine control system ,include the electro-optical switch, the counter, the temperature sensor, the pressure sensor, the fluid position sensor, and so on.5. Study multi-motor speed synchronic control question, analyze three kinds of synchronized signal's the gain way, compare with the respective good and bad points, and study synchronized signal's two processing mode. Analyze four commonly used synchronized methods with comparative analysis. Introduce the synchronized controller's characteristic. Study frequency converter's main circuit and the control circuit with 3 electric motors' speed synchronic control. Give the main circuit about PLC control,PLC I/O assignment, 3 unit speed synchronic control system's control circuit and PLC ladder diagram.6. Design sticks bottom bag-making machine control system's control scheme, including: Force electricity electrical power distribution system schematic diagram design; Synchronized controller outside plant's design; PLC input and output control circuit design. And the force electricity electrical power distribution system schematic diagram design includes control system's main circuit design, control system's light circuit design, DC24V relay's output control circuit design. According to sticks bottom bag-making machine control system's needs, determine I/O's points, choose FX2N-64MR to take system's control host.