SIMULTANEOUS DATA COLLECTING SYSTEM

摘要

PURPOSE:To suppress the simultaneous concentration of data report from all control devices to an arithmetic unit by allowing each control device to send data in an accumulation area turned to an accumulation disabled state while holding accumulated data to the arithmetic unit at the time of receiving a data report request signal sent from the arithmetic unit. CONSTITUTION:A CPU 1 determines leading packet control device 2 for collecting data and sends a data report request signal 31 for requesting data sending to the device 2. At the time of receiving the data report request signal, the device 2 branches the signal and sends the data in the accumulation area A turned to the accumulation disabled state while holding the previously accumulated data to the CPU 1. Namely the device 2 receiving the signal 31 sends the data 32 in the area A to the CPU 1. The CPU 1 receives the data 32 from the device 2 and collects them. Thus the simultaneous concentration of data report from all the control devices 2, 3 to the CPU 1 can be suppressed.