Distributed system and data transmission method

A data transmission method in a distributed system, the distributed system including a diagnostic data computer and an edge device that is at least one of an automatically operable moving body and equipment, the edge device including an in-edge controller including at least a processing unit, and a system element to be monitored by the in-edge controller, the data transmission method comprising:

• diagnosing, by the processing unit, presence or absence of an abnormality in the processing unit due to an abnormality occurring in the system element;
• generating, by the processing unit, first diagnostic data indicating presence or absence of the abnormality in the processing unit;
• aggregating the first diagnostic data for each type of abnormal state as aggregated first diagnostic data;
• converting, by the processing unit, the aggregated first diagnostic data into second diagnostic data indicating a type of the abnormality in the processing unit and being independent of the configuration of the edge device;
• and
• transmitting, by the processing unit, the second diagnostic data to the diagnostic data computer, which analyzes a cause of the abnormality in the processing unit based on the second diagnostic data;
• wherein the diagnostic data computer transmits a collection timing change command instructing a change of a transmission period of the second diagnostic data to the edge device, and
• wherein the collection timing change command is transmitted to the edge device based on a determination that a change in an error frequency of a data communication portion in the system element exceeds a predetermined threshold value.