Communication abnormality diagnosis device, communication system, communication abnormality diagnosis method, and program

摘要

The measuring unit (12) determines the communication device when a second interval shorter than the first interval defined as the minimum transmission interval of the control command elapses after the communication device receives the first control command among the control commands. Measures the signal waveform of the ACK command transmitted as an acknowledgment to the first control command. The diagnosis unit (175) diagnoses an abnormality in the communication path from the communication device to the communication abnormality diagnosis device based on the signal waveform measured by the measurement unit (12). The output unit (178) outputs the diagnosis result by the diagnosis unit (175).