| 摘要 |
PROBLEM TO BE SOLVED: To secure simultaneity of collection data without an influence on other functions of a control controller when performing data collection.SOLUTION: A data accumulation controller 2 comprises: a data collection start command message transmission unit for concurrently transmitting a data collection start command message to all control controllers 1; a data transmission request message transmission unit for sequentially transmitting a data transmission request message to each of the control controllers 1; and a data accumulation unit for accumulating data from each of the control controllers 1. Each of the control controllers 1 comprises: a data collection unit for, when the data collection start command message is received by a message receiving unit, collecting data with a period unified among control controllers 1; a data holding unit for holding the collected data; and a data transmission unit for, when the data transmission request message is received by the message receiving unit, transmitting the data in the data holding unit to the data accumulation controller 2. |
