Self-diagnosis method based on FPGA

Abstract

The invention discloses a self-diagnosis method based on FPGA. The method comprises the following steps of diagnosing an input interface of a preferred module, a driving output interface of the preferred module, and a priority logic of the preferred module, wherein the diagnosis of the input interface of the preferred module includes: comparing homologous input interface signals of the preferred module so as to check whether the signals are consistent; the diagnosis of the driving output interface of the preferred module includes: comparing an output control logic of the preferred module withan output feedback signal so as to check whether the logic and the signal are consistent; and the diagnosis of the priority logic of the preferred module includes: carrying out priority logic diagnosis while priority logic selection is performed on an input instruction of the preferred module, which means that all priority truth table data stored in an internal ROM or logic is read and CRC verification is performed so as to check whether the CRC verification is correct; and carrying out priority determination on the signals of different systems for the preferred module so that a guarantee is provided for ensuring that a driven device executes actions according to the correct signal.

Description

technical field [0001] The invention relates to the field of safety-level digital control of nuclear power plants, in particular to an FPGA-based self-diagnosis method. Background technique [0002] The driving signals of the driven equipment in nuclear power plants may come from multiple systems. In order to prevent the conflict between the signals from causing the driving device to fail to operate correctly, the optimization module needs to judge the priority of signals from different systems to ensure that the driven equipment executes according to the correct signal. Action, the preferred module adopts FPGA plus hardware circuit design scheme. In order to ensure that the FPGA executes the instructions correctly, self-diagnosis is required. There is no self-diagnosis method for FPGA in the prior art. Contents of the invention [0003] The invention provides an FPGA-based self-diagnosis method, which realizes the technical effect of providing a guarantee for the prioriti...

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Problems solved by technology

[0002] The driving signals of the driven equipment in nuclear power plants may come from multiple systems. In order to prevent the conflict between the signals from causing the driving device to fail to operate correctly, the optimization module needs to judge the priority of signals from different systems to ensure that the driven equipment executes according to the correct signal. Action, the preferred module adopts FPGA plus hardware circuit design scheme. In order to ensure that the FPGA executes the instructions correctly, self-diagnosis is required. There is no self-diagnosis method for FPGA in the prior art

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