基于PLC及WinCC的冷加工生产线上钻孔动力头的加工过程.docx
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基于PLC及WinCC的冷加工生产线上钻孔动力头的加工过程.docx
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基于PLC及WinCC的冷加工生产线上钻孔动力头的加工过程
分布式控制课程设计
冷加工生产线上钻孔动力头的加工过程目:
计设题
校:
学
机械工程学院院系:
员:
人设计
师:
教导指
任务描述··············································································································1
1····························································控制任务和要求·········································2·························································方案分析·····················································2·····················································硬件配置及I/O接线图·······································2··················································
(1)PLC外部接线图·········································2······························································································)系统硬件配置(23·························································································I/0地址分配·················3··················································································程序设计····························4···········································································
(1)创建符号表······················4·····································································
(2)创建组织块OB1·····················5·······························································STEP7仿真调试及运行····························5·························································
(1)调试方案确定·····································
(2)软件仿真调试······························································································6
WINCC介绍·······································································································7
)简介7(1
7
)突出优点(2SIMATICWINCC仿真···························································································8
8·······························································1()创建新的驱动程序·························8···················································
(2)建立变量表··············································9···············································································(3)创建运行画面···············11······················································设计总结·······················································12······················································参考文献·······················································
任务描述
在各种形式的工件加工过程中,以快进—工进—快退作为生产流动方式的工艺过程得到了广泛的应用。
设计控制器的原则是:
(1)可以根据实际工艺过程,设定具体的控制点。
(2)各具体要求的工艺过程能够很好的保持彼此间的关系。
(3)根据总体规模的大小要求,能够自由调整控制点个数。
为简单起见,将限位开关假设为一开关按钮,系统组成如图1所示。
在每动力头碰到限位开关时,相应的按钮被按下;
图1系统组成
控制任务和要求
(1)动力头在原为(压下限位开关SL0)时,按启动按钮,接通电磁阀YV1,动力头快进。
(2)动力头碰到限位开关SL1后,接通电磁阀YV1和YV2,动力头由快进转为共进。
(3)动力头碰到限位开关SL2后,延时3s。
(4)延时时间到,接通电磁阀YV3,动力头快退。
(5)动力头退回到原位后(碰到限位开关SL0)停车。
1.
方案分析
动力头加工过程控制装置是由两大部分组成:
电动机起停和限位开关。
电动机起停主要有关不同工位电动机的开关与工件所在位置的关系。
能完成任务中的相应要求,避免不工作的工位电机也保持转动。
限位开关主要用于判断工件所处的工位。
两个主要块在编写程序的过程中需注意以下几点:
a、各工位要有准确的顺序,不能存在逻辑上的混乱。
b、当退回是,一定要确保进位电磁阀保持断开,形成互锁,以免破坏系统。
c、尽可能的简短PLC的扫描周期,以便提高系统的运算速度。
d、减少暂时不产生作用却仍处接通状态的继电器的数量,以此减少能耗,使程序更加合理。
硬件配置及I/O接线图
(1)PLC外部接线图
根据控制要求、控制台设计描述,PLC外部接线图如图2所示。
用小开关模拟各输入信号,通过观察LED及蜂鸣器,检查程序的运行情况。
图2PLC的输入/输出接线图
(2)系统硬件配置
本系统对PLC的I/O总要求为:
6个开关量输入点,5个开关量输出点。
综合考虑各方面因素及进一步发展的要求,设计选择西门子S7—300系列PLC为控制核心,CPU模块可选用2.
CPU315—2.
图3系统硬件配置状况
I/0地址分配
开关量输入/输出模块的位置,决定了接入系统中模块I/O端子的物理地址,以便于程序设计。
本系统的I/O地址分配如图5所列。
4I/O地址分配表图
程序设计
应用程序是PLC控制系统设计的关键环节之一。
对于一个较复杂的控制系统,在具体设计应用程序之前,一般先要选择合理的程序结构。
合理的程序结构,不但能使编程工作简化,程序执行效率高、可读性强、可维护性好,而且还能起到事半功倍的效果。
线性化程序结构式小型、简单控制系统最常使用的结构,其特点是整个控制程序都放在组织块OB1中。
3.
6指示灯和音响运行图5图程序设计流程图图
)创建符号表(1中定义。
STEP7符号表定义控制装置的全局变量,已在图4用
OB1
2)创建组织块(中的梯形图程序如图7所示。
OB1控制装置系统的主程序循环块
4.
程序OB17图控制装置的仿真调试及运行STEP7)调试方案确定(15.
在使用“S7—PLCSIMSimulatingModules”STEP7组件正式运行之前,先定义各种运行状态,以便查找程序可能产生的错误。
①先接通M0.0
观察:
a、Q0.0是否接通;
b、电磁阀YV1是否接通并亮灯;
②先断开M0.0,接通M0.1,同时接通M0.2;
观察:
a、Q0.1、Q0.2触点是否保持接通;
b、电磁阀YV1、YV2触点是否接通并亮灯;
c、其他中间继电器是否处于关闭状态。
③保持接通M0.1,断开M0.2,再接通M0.3;
观察:
a、中间继电器Q0.4是否置位为1;
b、电磁阀YV1、YV2触点是否断开并停止亮灯;
c、计下T1的计时状态,看是否达到要求。
④在T1达到计时结束时,M0.1是一直保持接通的;
观察:
a、电磁阀YV3是否得电亮灯;
b、中间继电器Q0.4是否复位。
⑤断开M0.1;
观察:
a、观察Q0.4是否断开接通;
b、电磁阀YV3是否得停止亮灯。
(2)软件仿真调试
用组件“S7—PLCSIMSimulatingModules”对所编写的程序仿真调试。
按照确定的调试方案,结果如下图所示。
图8系统开始按下SB开始按钮状态图
图9动力头碰到限位开关SL1状态图
图10动力头碰到限位开关SL2后,T1计时状态图
6.
计时完毕状态图图11T1
SL0状态图图12动力头碰到限位开关
WinCC的简介印象深刻。
Controlcenter)简介;从面市伊始,用户就对SIMATICWinCC(Windows1()一方面,是其高水平的创新,它使用户在早期就认识到即将到来的发展趋势并予以实现;另一方面,是其基于标准的长期产品策略,可确保用户的投资利益。
Windows下的XP,这一运行于MicrosoftWindows2000和凭籍这种战略思想,WinCC控制中心,已发展成为欧洲市场中的领导者,乃至业界遵循的标准。
如果你想使设备和机器当是上乘之选。
最优化运行,如果想最大程度地提高工厂的可用性和生产效率,WinCC)突出优点;多功能(2可以集成到;多语言支持,全球通用通用的应用程序,适合所有工业领域的解决方案;Web所有自动化解决方案内
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