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Re-programmable flash memory micro controller as programmable logic controller

A programming logic, single-chip microcontroller technology, applied in general-purpose stored-program computers, architectures with a single central processing unit, instruments, etc. The effect of reducing parts and reducing costs

Inactive Publication Date: 2008-05-14
SIEMENS IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compiler and communication software functions can be large, greatly expanding beyond the permanent memory requirements needed to control the execution of user programs

Method used

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  • Re-programmable flash memory micro controller as programmable logic controller
  • Re-programmable flash memory micro controller as programmable logic controller

Examples

Experimental program
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Embodiment Construction

[0014] In this invention the functions of the programmable logic controller are arranged in physically separable units. These physically separable units include a program execution device or control device whose function is limited to program sequencing through the user logic, and a communication / programming device which provides the programmability function.

[0015] As shown in FIG. 1, a microcontroller 10 that combines a microprocessor 12, a RAM 14 and a programmable fast read-write memory EPROM 16 in a single package implements the logic core of a programmable execution device. The external pins 20 of the package can be used to the maximum extent for the I / O function of the programming control task, and need not be used by the microprocessor for accessing the external storage device. In this architecture, external memory devices, data / address buses, buffers, etc. are eliminated, thereby reducing the size and cost of control functions.

[0016] The communication / programmin...

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Abstract

Functions of a programmable logic controller are located in physically separable units. These physically separable units include a program execution device, or control device, whose function is limited to sequencing through the user logic program and a communication / programming device, which provides the programmability function. The micro controller incorporates a micro processor, RAM, and re programmable Flash EPROM in a single package implements the logical core of the program execution device.

Description

technical field [0001] The present invention relates to a flash memory, in particular to a reprogrammable flash memory microcontroller. The flash memory can be configured as a programmable logic controller. Background technique [0002] Programmable logic controllers currently on the market generally have a common architecture. Typically, the controller CPU includes a microprocessor for executing user programs under the supervision of the operating system, possibly supplemented by a custom control instruction processor (Boolean processor) for storing user and operating system Random-access data memory (RAM) for data, battery-backed RAM or nonvolatile EEPROM for storing user programs, and firmware ROM or EPROM for storing operating system software. [0003] Generally, the user program is prepared on a general-purpose computer, and then loaded into the PLC in the form of symbols. Loading is typically done via a serial communication protocol, although a removable memory cart...

Claims

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Application Information

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IPC IPC(8): G06F15/78
CPCG06F15/7853G06F15/7814
Inventor A·麦克努特
Owner SIEMENS IND INC