2N3A8204-B 接收从编程器输入的用户程序和数据

Description

2N3A8204-B 接收从编程器输入的用户程序和数据

在PLC中CPU按系统程序赋予的功能，指挥PLC有条不紊地进行工作，归纳起来主要有以下几个方面：

接收从编程器输入的用户程序和数据。

诊断电源、PLC内部电路的工作故障和编程中的语法错误等。

通过输入接口接收现场的状态或数据，并存入输入映象寄有器或数据寄存器中。

从存储器逐条读取用户程序，经过解释后执行。

根据执行的结果，更新有关标志位的状态和输出映象寄存器的内容，通过输出单元实现输出控制。有些PLC还具有制表打印或数据通信等功能。

2N3A8204-B 接收从编程器输入的用户程序和数据

In the PLC CPU according to the function given by the system program, command the PLC to work methodically, summed up mainly in the following aspects:

Receives user programs and data input from the programmer.

Diagnose power supply, PLC internal circuit fault and programming syntax errors.

The status or data of the field is received through the input interface and stored in the input image register or data register.

Read user programs from memory one by one, interpret them, and execute them.

According to the result of execution, the state of the flag bit and the contents of the output image register are updated, and the output control is realized through the output unit. Some PLCS also have tabulation printing or data communication functions.