| 摘要 |
PURPOSE:To easily recognize a faulty part from a recording data by comparing a reception data and a reference data and recording preceding/succeeding data only when a fault exists. CONSTITUTION:When a comparison circuit 1 compares a reception data with a reference data and dissidence is detected, a counter 13A is operated and a setting device 12A decides the residual count depending which position a recording circuit 15A records when an output of the comparison circuit 1 is given. When the counter 13A counts a residual count, an output of the counter 13A switches a selector 11 so as to give a reception data to a pointer 14B. Thus, the reception data is stored in a recording circuit 15B continuously and the data from the output of the comparator circuit 1 is recorded in the recording circuit 15A. When the output of the comparator circuit 1 enters the counter 13B, the counter 13B counts the residual count at that time, the output of the counter 13B switches the selector 11 to give the reception data to a pointer 14A. |
