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Data polling method and digital instrumentation and control system for atomic power plant using the method

A polling method and data technology, applied in the direction of electrical program control, data processing input/output process, comprehensive factory control, etc., can solve the problem of large data polling cycle in fault detection time, and achieve high reliability

Active Publication Date: 2014-01-01
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the existing digital control device system of nuclear power plants, the data polling cycle of the installed CPU is asynchronous with the data update cycle in the input module, and the input module fault detection time detected by the input module is relative to the CPU Larger in terms of data polling cycle

Method used

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  • Data polling method and digital instrumentation and control system for atomic power plant using the method
  • Data polling method and digital instrumentation and control system for atomic power plant using the method
  • Data polling method and digital instrumentation and control system for atomic power plant using the method

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Embodiment approach 1

[0023] figure 1 It is a structural block diagram explaining the digital instrument control system of a nuclear power plant using the data polling method according to Embodiment 1 of the present invention.

[0024] exist figure 1 Among them, the data input processing unit 100 in the digital instrument control system of a nuclear power plant includes: a CPU 10 ; and a unit for data input to the CPU 10 , such as an input module 20 .

[0025] The CPU 10 includes: a data transmission command output processing unit 11, the data transmission command output processing unit 11 outputs a data transmission command to the input module 20 with a predetermined cycle T1; Data; input module fault detection signal input processing part 13, the fault detection signal of input unit 20 is input to this input module fault detection signal input processing part 13; and CPU operation processing part 14, this CPU operation processing part 14 obtains input data storage memory 12 input data, and acqu...

Embodiment approach 2

[0036] Next, a nuclear power plant digital instrumentation control system according to Embodiment 2 of the present invention will be described. Figure 4 It is a structural block diagram explaining the nuclear power plant digital instrument control system concerning Embodiment 2.

[0037] In Embodiment 1, the input module 20 that directly processes data input from the outside, such as the pressure of a pressurizer in a nuclear power plant, the temperature of a heater, or the opening and closing status of auxiliary equipment, is described. Figure 4 The same effect can also be obtained by applying the digital control device for nuclear power plants connected to other devices in a network as shown to processing when communication data from other devices is input from the network communication module.

[0038] Figure 4 Among them, the data input processing unit 100a of the digital instrument control system includes a CPU 10a and a network communication module 30a, and is connec...

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Abstract

The present invention obtains a data polling method and a digital instrumentation and control system for an atomic power plant using the method. A CPU includes: a data transmission instruction output processor; a failure detection signal input processor to which a failure detection signal is input from a failure detection processor for detecting a failure of an input unit; a data storage memory for, each time an input data update processor of the input unit updates data, storing the updated data; and a CPU operation processor for obtaining input data from the data storage memory and obtaining a detection signal from the failure detection signal input processor to perform operation processing. The CPU operation processor obtains periodic data as of an amount of time given by the following expression ago: {ROUNDUP(T22 / T1)}T1, where T22 is the failure detection processing time of the failure detection processor, T1 is the data transmission instruction output period of the data transmission instruction output processor, and ROUNDUP is a function of rounding up to the nearest integer.

Description

technical field [0001] The invention relates to a data polling method and a nuclear power plant digital instrument control system using the method. Background technique [0002] In the digital control system of a nuclear power plant, in order to pursue high reliability, it is necessary for the system to be able to accurately determine the cause of a failure. To this end, a method is adopted in which, for example, the input data input from the outside, such as the pressure of the pressurizer, the temperature of the heater, or the opening and closing state of auxiliary equipment, etc., are attached with relevant information such as whether it is normal or abnormal. Judge the reliability of the data and confirm the reliability of the input data. [0003] To confirm the reliability of the input data, data polling is performed between the CPU (Central Processing Unit: Central Processing Unit) installed in the digital control device system of the nuclear power plant and the input...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCG06F11/0757G06F11/0724G06F3/0656
Inventor 浜田和秀
Owner MITSUBISHI ELECTRIC CORP
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