施耐德 昆腾系列 140CRP31200 PLC可编程控制系统备件

施耐德 昆腾系列 140CRP31200 PLC可编程控制系统备件

施耐德 昆腾系列 140CRP31200 PLC可编程控制系统备件

140CRP31200处理单元(CPU)处理单元(CPU)是PLC的控制中枢。它按照PLC系统程序赋予的功能接收并存储从编程器输入的用户程序和数据，检查电源、存储器、VO以及警戒定时器的状态，并能诊断用户程序中的语法错误

当PLC投入运行时，首先它以扫描的方式接收现场各输入装置的状态和数据，并分别存入IO映像区，然后从用户程序存储器中逐条读取用户程序，经过命令解释后，按指令的规定将逻辑或算术运算的结果送入Vo映像区或数据寄存器内。

140CRP31200 等所有的用户程序执行完毕之后，后将1/O映像区的各输出状态或输出寄存器内的数据传送到相应的输出装置，如此循环运行，直到停止运行为止。

140CRP31200 为了进一步提高PLC的可靠性，近年来对大型PLC还采用双CPU构成冗余系统，或采用三CPU的表决式系统。这样，即使某个CPU出现故障，整个系统仍能正常运行。

施耐德 昆腾系列 140CRP31200 PLC可编程控制系统备件

140CRP31200 Processing Unit (CPU) The processing unit (CPU) is the control center of the PLC. It receives and stores the user program and data input from the programmer according to the function given by the PLC system program, checks the state of the power supply, memory, VO and alarm timer, and can diagnose the syntax errors in the user program

When the PLC is put into operation, it first receives the status and data of each input device in the field by scanning, and stores them into the IO image area, and then reads the user program one by one from the user program memory, and after command interpretation, sends the results of logic or arithmetic operations into the Vo image area or data register according to the provisions of the instruction.

After the execution of all the user programs such as 140CRP31200, the output state or the data in the output register in the 1/O image area is transmitted to the corresponding output device, so the cycle runs until it stops running.

140CRP31200 In order to further improve the reliability of the PLC, in recent years, the large PLC also uses dual CPU redundancy system, or uses a three-CPU voting system. In this way, even if one CPU fails, the whole system can still run normally.