JPH0822102B

PURPOSE:To perform maintenance without stopping the whole system by providing plural second controllers which manage first controllers in unit of group, and a third controller which performs the input/output of equipment information. CONSTITUTION:When machine specification, equipment number 'AAA-aa', and equipment control information are inputted to a supervisory console (KSC) by using a keyboard(KBD), they are converted to an equipment number 'BB- CCbb'. The equipment number 'BB-CCbb' and the equipment control information are sent from the KSC, and a master controller(MSC) 20 designated by a number 'CC' receives them. The equipment control information is sent from the MSC 20 to a terminal (RS) 20 to perform the transmission/reception of the equipment information between equipment (DV) 20 designated by an equipment 'BB-bb'. The input/output of equipment data is performed between the RS 20 and the DV 20 based on the equipment control information. Equipment data information is sent from the RS 20 to the MSC 20. The equipment data information is sent from the MSC 20 to the KSC with the equipment number. The KSC receives the equipment data information and displays a result.