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1、?I?PLC?PLC?PLC?她?她?她?她?她PLC?CAD将CAM?PLC?她?她?她?PLC?她PLC?她?她?富?PLC?PLC?PLC?II?:?PLC?Stoplight PLC control system design Abstract The emergence of traffic lights,so traffic can be effectively controlled,for ease traffic flow,increase road capacity and reduce traffic accidents have remarkable results.In
2、 order to achieve traffic management,advanced traffic management sought and scientific.Programmable controller with control of traffic light control system and the system software and hardware design,proved that the system simple,economic,effective in easing traffic congestion,improve traffic juncti
3、on capacity.Analysis of the modern urban traffic control and management status,combined with the traffic situation described the traffic light control system working principle of a simple and practical urban traffic light control system PLC design.Programmable Logic Controllers position in industria
4、l automation is extremely important,widely used in various industries.With the development of technology,programmable controller features more sophisticated and smaller,low cost,high reliability,in the modern industry in a more prominent role.PLC programmable logic controller is a microprocessor-bas
5、ed,integrated computer technology,automatic control technology and communication technology from a new type of industrial control devices.It has a simple structure,convenient programming,and higher reliability,has been widely used in industrial processes and control of the location.According to stat
6、istics,the programmable controller is the most widely used industrial automation equipment in a device.Experts believe,PLC will become the primary means of industrial controls an important infrastructure and one of,PLC,robotics,CAD/CAM will be the three pillars of industrial production.As the PLC wi
7、th the use of environmental adaptability features,while its internal timer resources are very rich,the current widespread use of ?III?progressive precise control of lights,in particular the control of multi-fork can be easily achieved.Therefore,the PLC is now increasingly used in traffic lights syst
8、em.Meanwhile,PLC itself with communications networking,will be the same signal on the road to form a unified LAN,scheduling management,vehicle traffic can reduce the waiting time to realize the scientific management.As the PLC with the use of environmental adaptability features,while its internal ti
9、mer resources are very rich,the current widespread use of progressive signal for precise control,particularly control over the fork can be easily achieved.Therefore,the PLC is now increasingly used in traffic lights system.While some also introduces touch-screen simulation of vehicle traffic crossin
10、g lights flash and the very image of the PLC to show the traffic light system in practical application.Key words?Traffic lights?Program;design ?IV?.I Abstract.II 1?.1 1.1?.1 1.2?.2 1.2.1 PLC?.2 1.2.2 PLC?.3 1.2.3 PLC?.4 1.2.4 PLC?.5 1.3?.6 2 PLC?.7 2.1?.7 2.2?.7 3?.11 3.1?.11 3.2?.12 3.3 PLC?.13 3.3
11、.1 PLC?.13 3.3.2 I/O?.13 3.3.3 PLC?.15 4?.17 4.1 STEP7?.17 4.2?.17 4.2.1 PLC?.17 4.2.2?.18 4.3?PLC?.19 ?V?.22?.1?.2 ?1?1?1.1?1982?2000?680?12?1.5?117?7%?35%-40%?20%?2010?500?2005?600?2?PLC?PLC?PLC?PLC?Programmable Logic Controller?1.2?1.2.1 PLC?PLC?1?PLC?2?Analog?Digital?A/D?D/A?PLC?A/D?D/A?3?3?PLC?
12、I/O?PLC?4?PLC?PID?PLC?PID?PLC?PID?PID?5?PLC?6?PLC?PLC?PLC?PLC?PLC?PLC?1.2.2 PLC?1?PLC?1/10-1/100?4?PLC?2?PLC?PLC?PLC?PLC?CNC?PLC?PLC?3?PLC?PLC?4?PLC?5?PLC?100mm?150g?1.2.3 PLC?PLC?PLC?PLC?CPU?I/O?PLC?CPU?I/O?PLC?2-1?5?2-1 PLC?1.2.4 PLC?PLC?1?PLC?PLC?2?3?CPU?6?1.3?度?微?悦?素磨烁?惜?拍?素磨烁?1?2?3?4?1?7?2 PLC?
13、2.1?PLC?PLC?PLC?PLC?1?2?3?4?PLC?PLC?1?2?I/O?3?PLC?4?5?6?7?2.2?PLC?1?2?3?PLC?4?5?8?6?1)?2)?I/O?3)?PLC?4)?PLC?5)?2-1?2-1?I/O?PLC?I/O?N Y?N N?9?PLC?PLC?1?PLC?2?PLC?PLC?3?PLC?PLC?PLC?PLC?I/O?PLC?/?PLC?I/O?10?I/O?PLC?PLC?PLC?/?PLC?PLC?PLC?11?3?3.1?3-1?3-1?1?PLC?3?SA1?SA1?12?45?SA1-1?3-2?SA1?0?SA1-2?SA1?4
14、5?SA1-3?2?1)?2)?3)?3.2?3-2?1?0?1?0?3-2?13?3.3 PLC?3.3.1 PLC?PLC?/?I/O?PLC?PLC?PLC?PLC?PLC?PLC?PLC?1)?(Siemens)?SIMATIC S7-400/300/200?2)?(Rockwell)?AB(Allen&Bradly)?SLC?Micro Logix?Control Logix?3)GE-Fanuc?4)?(Schneider)?5)?PLC?S7-200PLC/CPU224?24?/16?3.3.2 I/O?I/O?3-1?3-2?3-1?I0.0?14?I0.1?3-2?3-1?Q
15、0.0?Q0.1?Q0.2?Q0.3?Q0.4?Q0.5?Q0.6?Q0.7?Q1.0?Q1.1?Q1.2?Q1.3?Q1.4?Q1.5?Q1.6?Q1.7?Q2.0?Q2.1?15?3.3.3 PLC?PLC?3-3?SA1-1 X0?H1 Y0?SA1-2 X1?H2 Y1?SA1-3 X2?H3 Y2?H4 Y3?H5 Y4?H6 Y5?Y6COM1Y0电电东东东南Y1东东东南Y2东东南南COM2Y4南南东南Y5南南东南南南南南输输220 V ACLNCOMSARUNSB1X0SB2X1SB3X2X3停停输输FX2娱32MR?16?3-3?PLC?I/O?PLC?PLC?17?4?STE
16、P7?4.1 STEP7?STEP7?SIMATIC S7?M7?C7?PC?WinAC,?STEP7?:?STEP7?STEP7?SIMATIC?SIMATIC S7?M7?C7?WinAC?STEP7?SIMATIC?STEP7?4.2?4.2.1 PLC?18?PLC?3-4?3-4?PLC?4.2.2?3-4?1?PLC?M8002?S0?1?2?SA1?0?X1?Y1?3?SA1?45?X2?Y1?4?SA1?45?X0?S20?S30?S20?S30?1?S0?Y1?Y6?5?25S?T0?S20?S21?S21?1?T1?S20?6?5S?T1?S21?S22?S22?1?0.5
17、S?S0启启X0Y6S20Y6Y0Y0T0K250S21T1K5T0T1S22Y0C0T2S23Y1T3K20T3南南南南东东东南T2K5K3C0T2C0S24Y2T7RST C0S30Y6T4K250S31Y4K5T3T1S32T5T6S33Y4T6C1T6C1S34Y5RST C1T5C1K5K3T7K?19?C0?C0?S21?7?C0?S22?S23?S23?1?S22?Y2?8?2S?T3?S23?S24?S24?1?S23?Y3?C0?S30?S31?S31?1?S30?Y4?9?25S?T4?S31?S32?S32?1?T5?S31?10?5S?T5?S32?S33?S33?1?
18、0.5S?C1?C1?S32?11?C1?S33?S34?S34?1?S33?Y5?C1?12?2S?S0?4.3?PLC?PLC?20?21?22?VHDL?1?2?度言?PLC?微峰峰悦?微言?她?极?PLC?微峰峰悦?悦言?PLC?娱?微峰峰拍(微惜)惜言?VHDL?微峰峰接?提微娱提拍?拍言?PLC?娱?微峰峰教她微接(悦)接言?VHDL?微峰峰接?度悦娱度拍?提言?VHDL?微峰峰惜?提接娱提提?教言?富 PLC?富?微峰峰惜 既言?富PLC?富?度既既提 度峰言?富PLC?富?微峰峰度 度度言?富?度微言?富?富?富?富微峰峰悦 度悦言?富?富?微峰峰微 度惜言?型?型?富?极?她微峰峰拍 度拍言?PLC?富?富微峰峰惜 度接言?度既教提 度提言?PLC?度既既接 度教言?富?富?微峰峰微 度既言?微峰峰惜