MAINTENANCE TERMINAL CONTROL SYSTEM

PURPOSE:To facilitate the addition and expansion of the control and maintenance terminal equipment by describing a program started at the occurrence of an event of the maintenance terminal equipment in a virtual address as a control program having multiplexity of the number of the maintenance terminal equipment connection lines, converting the address into the physical address in the occurrence of the event and executing a control task. CONSTITUTION:When an event monitor section 11 of a central controller 10 detects an event of a processing request from a maintenance terminal equipment 21 via a maintenance terminal equipment connection circuit 20, a maintenance terminal equipment management task 16 is started. The task 16 starts a maintenance terminal equipment control task 17 corresponding to the terminal equipment detecting an event, references an address conversion table 19 to convert a virtual address into a physical address thereby accessing a corresponding task individual storage space 18. Thus, the maintenance terminal equipment control task 17 starts a task within the multiplexity of the number of maintenance terminal equipment connection lines to facilitate the addition and expansion of the maintenance terminal equipment.