JPS6473895A - Data collection system - Google Patents

Abstract

PURPOSE:To prevent a control part from being restrained only for the collection of data by transmitting response data from the control part to a part to be controlled at a remote place by adding a gate circuit at each part to be controlled and gating selectively the response data from the control part sequentially at the time of collecting the data by performing the tandem connection of the control part and plural parts to be controlled. CONSTITUTION:When timings to send the data by the part 110 to be controlled and the part 120 to be controlled are generated simultaneously, the response data from the part 110 to be controlled is selected as the response data to the control part 1. The control part 1, when completing reception normally, outputs a normal reception completion signal to the final data bit. The part 110 to be controlled receiving the response data with a response signal generates a through state between response data signal lines 61 and 62. When the response data from the part 120 to be controlled is transmitted to the control part 1 at the next timing and the response signal is received, the through state between the response signal lines 82 and 83 is set. Therefore, it is possible to collect the data at high speed without necessitating the delivery of an address sequentially from the control part to the part to be controlled.