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PLC (Programmable Logic Controller) ladder diagram hardware processor

A ladder diagram and component technology, applied in machine execution devices, concurrent instruction execution, etc., can solve problems such as lack of core technology, lack of cost competitiveness, and difficulty in designing high-performance PLCs, to improve processing speed and reliability. Effects of Sex and Safety

Active Publication Date: 2013-11-20
BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
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Problems solved by technology

Through the analysis of foreign advanced PLC products, it is found that the factors restricting the development of PLC products in my country are the lack of competitiveness in cost on the one hand, and the lack of core technology on the other. It is difficult to design high-performance PLCs and form serialized product types. spectrum

Method used

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  • PLC (Programmable Logic Controller) ladder diagram hardware processor
  • PLC (Programmable Logic Controller) ladder diagram hardware processor
  • PLC (Programmable Logic Controller) ladder diagram hardware processor

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Embodiment Construction

[0027] The present invention completes the coding design of the LadderPU program by analyzing the commonly used ladder diagram language codes in the world; optimizes the ladder diagram processing mode, completes the LadderPU architecture design and the ladder diagram program analysis path design; Open contacts, normally closed contacts) and coils (normally open coils, normally closed coils, set coils, reset coils, rising edge coils, falling edge coils), complete the processing circuit design; according to the needs of ladder diagram function modules, complete the function module processing circuit design. In addition, according to the high-reliability control requirements in the industrial field, the on-site protection circuit design is carried out to ensure that the system can recover quickly after a catastrophic failure occurs.

[0028] 1. Ladder diagram instruction coding

[0029] According to the basic composition and commands of the ladder diagram, the ladder diagram cod...

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Abstract

The invention discloses a PLC (Programmable Logic Controller) ladder diagram hardware processor used for performing hard parse on a PLC ladder diagram. The PLC ladder diagram hardware processor comprises an instruction decoding unit, a row guide controller, a column element register, a multipath selector, an element input state controller, an element combination state controller, a rows OR relationship register, an AND logic operation unit, a column output intermediate state controller, and an OR logic operation unit. According to the PLC ladder diagram hardware processor in the invention, the parse of a ladder diagram instruction is realized.

Description

technical field [0001] The invention belongs to the design field of special hardware processors for industrial control, and relates to a PLC ladder diagram hardware processor. Background technique [0002] As a general-purpose industrial control computer, PLC is widely used in the industrial field due to a series of advantages such as simple and easy to understand, convenient operation, high reliability, general flexibility, small size, and long service life. Its interface is easy, and the programming language is easy to be accepted by engineers and technicians. The graphical symbols and expressions of the ladder diagram language are quite close to the relay circuit diagram, and the function of the relay circuit can be realized conveniently only with a small amount of switching logic control instructions of the PLC. [0003] At present, PLC products mainly come from foreign companies such as Omron, Schneider, and NEC, and there are no high-level PLC equipment manufacturers ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/30G06F9/38
Inventor 刘亮亮蒋彭龙赵雄波魏守嵘吴松龄谢坡岸
Owner BEIJING AEROSPACE AUTOMATIC CONTROL RES INST
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