WINGREEN ATKB_V5.0_A01 03ZSTI4-01-501

Description

WINGREEN ATKB_ V5.0_ A01 03ZSTI4-01-501

The central processing unit (CPU) consists of a controller, an arithmetic unit and a register and is integrated into a chip. CPU is connected with memory, input/output interface, programmer and power supply through data bus, address bus, control bus and power bus.

The CPU of small PLC adopts 8-bit or 16-bit microprocessor or single chip microcomputer, such as 8031, M68000, etc. The price of such chips is very low; The CPU of medium-sized PLC adopts 16-bit or 32-bit microprocessors or single chips, such as 8086 and 96 series single chips, which are mainly characterized by high integration, fast operation speed and high reliability; However, large PLCs need to use high-speed chip microprocessors.

The CPU commands the PLC control system to complete various tasks according to the functions given by the system program in the PLC.

storage

The memory in PLC is mainly used to store system programs, user programs and data.

System program memory

The PLC system program determines the basic functions of the PLC. This part of the program is written by the PLC manufacturer and solidified in the system program memory, mainly including system management program, user instruction interpretation program, functional program and system program call.

The system management program mainly controls the operation of PLC to make it work in the correct order; The user instruction interpreter converts the user instructions of PLC into machine language instructions and transmits them to the CPU for execution; Function program and system program call are responsible for calling different function subprograms and their management programs.

The system program is an important data that needs to be stored for a long time, so its memory uses ROM or EPROM. ROM is a read-only memory, which can only read content, but cannot write content. ROM is non-volatile, that is, it can still save the stored content after the power is disconnected.

EPEROM is an electrically erasable read-only memory, which can only erase the written content by irradiating the lens window on the chip with ultraviolet light. The electrically erasable programmable read-only memory also includes E2PROM, FLASH, etc.
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3500/50 BENTLY installation and transportation