Data collection system, data collection method, and controller

A data collection method of causing a server to receive measured data from a controller that controls a machine,

• the controller executing:
• a data acquisition step of acquiring the measured data in chronological order;
• a timing control step of buffering the measured data and controlling timing of transmitting the measured data to the server based on a transmission condition;
• a data transmission step of, in response to an instruction by the timing control step, transmitting the measured data to the server having been buffered until the instruction is given;
• and
• a transmission condition acquisition step of receiving the transmission condition from the server, and
• the server executing:
• a state determination step of determining a degree of state abnormality occurring during control of the machine based on the received measured data;
• a transmission condition decision step of deciding the transmission condition based on a result of the determination by the state determination step;
• and
• a transmission condition notification step of notifying the controller of the transmission condition.

A controller comprising:

• a data acquisition unit that acquires measured data about a machine in chronological order;
• a timing control unit that buffers the measured data and controls timing of transmitting the measured data to a server based on a transmission condition;
• a data transmission unit, in response to an instruction by the timing control unit, that transmits the measured data to the server having been buffered until the instruction is given;
• and
• a transmission condition acquisition unit that receives the transmission condition decided by the server in response to a degree of state abnormality occurring during control of the machine determined based on the transmitted measured data.