초록 ▼

A check system for a control board having a microcomputer includes a checker which is actuated by a check program provided with the microcomputer. At each time line shift signals are generated, all input signal levels of the respective input connectors of the control board, except for the given conn

A check system for a control board having a microcomputer includes a checker which is actuated by a check program provided with the microcomputer. At each time line shift signals are generated, all input signal levels of the respective input connectors of the control board, except for the given connector, are detected to output at check output connectors signal levels corresponding to the input signal levels in the input line check. The respective output connectors of the control board, except for the certain connector, are rendered in active states, in sequence, in an output line check. The system thus detects an abnormal state disposed between the terminals of the microcomputer and the connectors of the control board.

대표청구항 ▼

A check system comprising a control board having a plurality of input/output connectors to be connected to an apparatus, and a microcomputer provided on the control board and having a plurality of input/output terminals each connected to the corresponding input/output connector of the control board

A check system comprising a control board having a plurality of input/output connectors to be connected to an apparatus, and a microcomputer provided on the control board and having a plurality of input/output terminals each connected to the corresponding input/output connector of the control board through the respective interface and a control program for controlling the actual operation of the apparatus in series, said microcomputer including a line check program for checking an abnormal state to be disposed between the input/output terminals and input/output connectors, said line check program including a first function for appointing a check mode when a check signal is introduced into said input connector which is not used during the operation of the control program, a second function for appointing either an input line check or an output line check in said check mode, a third function in said check mode for selecting either said input connector in said input line check or said output connector in said output line check, a fourth function for detecting the signal level of said input terminal connected to said input connector which is selected in said input line check, a fifth function for outputting, in the check operation wherein one of the output connectors is employed as a test output connector, a signal corresponding to the level of said input terminal to be detected by the fourth function to said output terminal connected with said test output connector, and a sixth function for outputting a signal of a certain level from said output terminal connected with said output connector which is selected in the output line check.