变频器供应22B-D012N104BD罗克韦尔

22B-D012N104BD

22B-D012N104BD

１、顺序控制

顺序控制是PLC基本、应用广泛的领域。所谓的顺序控制，就是按照工艺流程的顺序，在控制信号的作用下，使得生产过程的各个执行机构自动地按照顺序动作。由于它还具有编程设计灵活、速度快、可靠性高、成本低、便于维护等优点，所以在实现单机控制、多机群控制、生产流程控制中可以完全取代传统的继电器接触器控制系统。它主要是根据操作按扭、限位开关及其它现场给来的指令信号和传感器信号，控制机械运动部件进行相应的操作，从而达到了自动化生产线控制。比较典型应用在自动电梯的控制、管道上电磁伐的自动开启和关闭、皮带运输机的顺序启动等。例如我分厂的原料混料系统就是利用了PLC的顺序控制功能。

２、闭环过程控制

以往对于过程控制的模拟量均采用硬件电路构成的PID模拟调节器来实现开、闭环控制。而现在完全可以采用PLC控制系统，选用模拟量控制模块，其功能由软件完成，系统的精度由位数决定，不受元件影响，因而可靠性更高，容易实现复杂的控制和先进的控制方法，可以同时控制多个控制回路和多个控制参数。例如生产过程中的温度、流量、压力、速度等。

Siemens CPU 943B 6ES5943-7UB11 Simatic S5 6ES59437UB11

Siemens S7 400 CPU 6ES7 416-2XK02-0AB0 6ES74162XK020AB0

Siemens / TI 575-2103 CPU MODULE

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Siemens 6ES7 416-2XK00-0AB0 SIMATIC S7-400 ~CPU 416-2DP

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Siemens / TI 555-1102 CPU MODULE

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SIEMENS 6ES5-942-7UB11/6ES5942-7UB11 CPU MODULE**NNB**

Siemens 6ES7 416-2XK02-0AB0 6ES74162XK020AB0 CPU 416-2

Siemens TI 555-1102 CPU 5551102 

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