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CPU unit of programmable logic controller, programmable logic controller, method and computer

A technology of programming logic and controller, applied in the field of computer programs, can solve the problems of high development cost and unrealistic

Active Publication Date: 2021-08-24
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since it is necessary to add an arithmetic circuit customized for all processing in the program to the ASIC, the development cost is too high, so it is not practical

Method used

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  • CPU unit of programmable logic controller, programmable logic controller, method and computer
  • CPU unit of programmable logic controller, programmable logic controller, method and computer
  • CPU unit of programmable logic controller, programmable logic controller, method and computer

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Experimental program
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Embodiment approach

[0024] Hereinafter, a programmable logic controller (Programmable Logic Controller, hereinafter referred to as PLC) 1 according to an embodiment of the present invention will be described.

[0025] Such as figure 1 As shown, PLC 1 includes: CPU unit 100, which controls PLC 1 as a whole; Input unit 200, which supplies input data of CPU unit 100 operations to CPU unit 100; Supply output data.

[0026] A detector 901 including a sensor, a switch, and the like is connected to the input unit 200 . On / off signals output from sensors, switches, and the like of the detector 901 are supplied from the input unit 200 to the CPU unit 100 .

[0027] For example, the input unit 200 supplies the ON signal as a notification that the switch of the detector 901 is turned on, and the OFF signal as a notification that the switch is turned off, to the CPU unit 100 . When the ON signal is represented as “1” and the OFF signal is represented as “0”, when the switch is turned on, the input unit 20...

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Abstract

A CPU unit (100) has an MPU (142) and an FPGA (143) for processing commands as an arithmetic device. The command includes computing device information indicating the computing device selected by the user as the computing device that processes the command. The MPU (142) processes commands when the computing device information indicates the MPU (142). The FPGA (143) processes the command when the computing device information indicates the FPGA (143). If the computing device information is changed, the command is processed by the MPU (142) or FPGA (143) based on the changed computing device information.

Description

technical field [0001] The present invention relates to a CPU unit of a programmable logic controller, a programmable logic controller, a method, a computer and a computer program. Background technique [0002] In the case of a programmable logic controller (Programmable Logic Controller: PLC) used in the field of factory automation, the CPU (Central Processing Unit) unit has an ASIC (Application Specific Integrated Circuit) and a microprocessor for general processing. (Microprocessor: MPU). The ASIC executes specific processing determined at the time of design, and the microprocessor executes processing that cannot be processed by the ASIC in design. Since the computing performance of the microprocessor is not as high as that of the ASIC, the processing capability of the microprocessor becomes a difficulty in speeding up the operation of the CPU unit. [0003] If the ASIC processes all the commands, it is possible to speed up the operation of the CPU unit. However, since...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/05
CPCG05B19/05
Inventor 石黑夏实高木伴彰仲川润
Owner MITSUBISHI ELECTRIC CORP