INPUT/OUTPUT PROCESSOR FOR INFORMATION DATA

PURPOSE:To constitute the titled processor so that a controller can advance to the next processing without stopping, by outputting a response output even when an erroneous output request has been received from the controller. CONSTITUTION:An input/output control part 12 operates as an interface for controlling an input and an output of an information data between a controller and a device. A request deciding means 34 decides whether an output request received from the controller is correct or erroneous, through the input/output control part 12. Also, an erroneous request response means 36 receives a result of its decision, and sends out a response output to the controller through the input/output control part 12, even when the output request is erroneous. Accordingly, the controller receives the response output, even when an erroneous output request has been outputted to the device, and can advance to the next processing.