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Segment table based PLC (programmable logic controller) runnable file storage and analysis method and storage system

A technology for running files, storing and analyzing, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve problems such as poor confidentiality and system insecurity, and achieve improved security, strong practical value and reality meaning effect

Active Publication Date: 2016-04-20
中电智能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, at present, the above-mentioned traditional technologies have the disadvantages of poor confidentiality and insecure systems.

Method used

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  • Segment table based PLC (programmable logic controller) runnable file storage and analysis method and storage system
  • Segment table based PLC (programmable logic controller) runnable file storage and analysis method and storage system
  • Segment table based PLC (programmable logic controller) runnable file storage and analysis method and storage system

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Embodiment Construction

[0038] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Such as figure 1 As shown, the PLC executable file storage system based on the segment table of the present invention includes: CPU, GPIO, PROM, SDRAM, SRAM, DSU, UART, AD, TIMER based on SPARC (scalable processor architecture, ScalableProcessorARChitecture) architecture; The CPU based on the SPARC architecture is respectively connected with PROM, SDRAM, SRAM, DSU, UART, AD, TIMER, I2C bus, and 1553B bus. The 1553B bus is the abbreviation of the MIL-STD-1553 bus, and the MIL-STD-1553 bus is a time-division command / response multiplexed data bus inside the aircraft. The PLC is a programmable controller; the GPIO is a general-purpose I / O terminal (General-PurposeInput / OutputPorts); the PROM is a programmable read-only memory (ProgrammableRed-OnlyMemory), and the PROM is used for storing the operating system and NBP file; The SDRAM is a Synchronous Dynamic...

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Abstract

The invention discloses a segment table based PLC (programmable logic controller) runnable file storage and analysis method and storage system. The storage system comprises a CPU (central processing unit), a GPIO (general-purpose input / output port), a PROM (programmable read-only memory), an SDRAM (synchronous dynamic random access memory), an SRAM (static random access memory), a DSU (debug support unit), a UART (universal asynchronous receiver / transmitter), an AD (analog-digital converter) and a TIMER based on an SPARC (scalable processor architecture). The storage and analysis method comprises steps as follows: (1) code information, external IO configuration information, external library information and task information are recorded in four sections respectively; (2) information about the position, the length and the section number of corresponding sections of the code information, the external IO configuration information, the external library information and the task information are recorded in four sections; (3) the whole file is described through a file head and CRC (cyclic redundancy check) is realized; (4) the file is analyzed. The method and the system have the advantages that the data transmission and storage safety is improved on the premise that the PLC structure is not changed and the use is not affected; meanwhile, the analysis speed of the file is not affected, and the method and the system have higher practical value and practical significance.

Description

technical field [0001] The invention relates to a segment table-based PLC executable file storage and analysis method and storage system, belonging to the technical field of industrial control PLC. Background technique [0002] At present, more and more modern industrial enterprises use PLC to realize production process control. The control program needs to be programmed in the host computer, and the program is downloaded to the PLC to run. Therefore, a storage system and a corresponding storage method are needed to store the executable files of the PLC. [0003] The current traditional PLC executable files can basically be divided into two categories: interpreted PLC executable files and compiled PLC executable files. The principle of the interpreted PLC executable file is to store the user's program by using the analytical statement, and the statement table is parsed by the interpreter at runtime. This method runs relatively slowly, and the file is easy to be cracked. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/062G06F3/0643
Inventor 郭佳贡春燕闵曉霜王强
Owner 中电智能科技有限公司