TERMINAL CONTROLLING SYSTEM

PURPOSE:To improve the utilization efficiency of a circuit, by taking out the discrimination code of an operator, and adding it to an answering message from a central device at a terminal controlling device, and the result is outputted to an input-output device. CONSTITUTION:When enquiry data 7 from an input-output device 3 to a central device 1 is inputted, a enquiry transmission controlling block 6 and a enquiry message 5 in which the enquiry data is edited are transmitted to the central device 1. The central device 1 sets a transmitted address input-output device No. in an answer transmission controlling block 10, and, at the same time, sets information which designates the addition of an operator discrimination code to answer control information 11 at a terminal controlling device 2 and transmits an answering message 8 to the terminal controlling device 2. The terminal controlling device 2 receives the answering message 8 and outputs a terminal output message 9 to which the operator discrimination code data 13 is added to the input-output device 3.