JPS5628105A - Input and output control circuit for automated warehouse - Google Patents

Abstract

PURPOSE:To inform immediately an operator of the details of a trouble display to improve operability of an automated warehouse, by combining contact point input signals from outside at an input/output circuit of a progammable arithmetic unit. CONSTITUTION:A contact point input signal 32 from an automated warehouse system is input to an input/output circuit 25 through a contact point input relay 28, after electric insulation of the signal has been attempted with a photo-coupler 35, then the signal 32 is input from the data path in a programmable arithmetic unit 18 to a central processing unit 22, where arithmetic decision and other treatments of the signal 32 are made. At this time, the contact point signal 32 which changes with the warehouse system operation or the data after the arithmetic treatment is input to a variable data circuit 24 by means of a clock circuit 26 and stored there for a while. The contact point signal 32 is output as a command signal by a signal judgement circuit 30, and this command signal is logically added to an output signal from the input/output circuit 25 at a logic multiplication circuit 31, and this circuit 31 responses immediately to output information to an operator.