Field equipment and diagnostic methods

Abstract

To improve the diagnostic efficiency of the processor. [Solution] The field device 10 comprises a processor 11 and a self-diagnostic circuit 13 included in the processor 11 and having general-purpose input / output terminals 14. The processor 11 executes a program that outputs calculation results in response to sensor data input. If the program is not executed in the correct order, the self-diagnostic circuit 13 changes the state of the general-purpose input / output terminals 14 and outputs an error signal.

Claims

1. Processor and A self-diagnostic circuit having input / output terminals is included in the aforementioned processor, Equipped with, The aforementioned processor, This involves running a program that outputs calculation results based on sensor data input, The self-diagnostic circuit described above is If the program is not executed in the correct order, the state of the input / output terminals will be changed and an error signal will be output. A field device that performs this task.

2. The self-diagnostic circuit described above is The program has a plurality of input / output terminals corresponding to a predetermined number of checkpoints, and changes the state of any of the plurality of input / output terminals corresponding to a predetermined sequence and outputs the error signal. The field device according to claim 1.

3. The predetermined sequence includes setting the input mode and setting the output mode, wherein the setting of the output mode includes setting a high state or a low state. The field device according to claim 2.

4. Multiple processors, Each of the aforementioned processors includes a plurality of self-diagnostic circuits, Equipped with, The aforementioned multiple self-diagnostic circuits are The state of the input / output terminals of either device is changed, and the error signal is output. The field device according to claim 2.

5. The self-diagnostic circuit described above is The system further includes an input / output terminal for error detection that detects the input / output terminal that outputs the aforementioned error signal. The field device according to claim 2.

6. The self-diagnostic circuit described above is The output mode is set to open-drain mode. The field device according to claim 3.

7. The predetermined sequence includes setting the input mode and setting the output mode, wherein the setting of the output mode includes setting the pulse output. The field device according to claim 2.

8. The aforementioned input / output terminal is GPIO (General Purpose Input / Output). The field device according to any one of claims 1 to 7.

9. A diagnostic method performed by a field device, The processor, This involves running a program that outputs calculation results based on sensor data input, A self-diagnostic circuit included in the aforementioned processor, having input / output terminals, If the program is not executed in the correct order, the state of the input / output terminals will be changed and an error signal will be output. A diagnostic method to perform.

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