METHOD FOR RECOGNIZING DEADLOCK

PURPOSE:To make it possible to recognize nicely and surely by monitoring time out referring to maximum response time of a ROM and resetting the apparatus when time out occurred twice continuously and making indication of trouble. CONSTITUTION:Controlling data from the control inputting device 1 of a master station equipment 2 are transmitted to a slave station and corresponding apparatus are controlled. At this time, corresponding maximum time 1 is read out from a ROM 9 according to output of a control parameter circuit 6 and supplied through a multiplexer 12, and time out is detected by an answer back detecting circuit 10 to which answer back time is supplied from the slave station. Then, retrying is made, and when time out occurred twice continuously, corresponding apparatus is reset forcibly, and at the same time, trouble is displayed in a display unit 4. As time division fixed response time is not used, good and sure deadlock recognition can be made.