| 摘要 |
<p>PURPOSE:To prevent the generation of the undecided data by operating a previous announcement signal generating means before unloading a printed board, sending a previous announcement signal to a processor, thereby performing the countermeasures to end the processing during execution, etc. CONSTITUTION:The previous announcement signal generating means 131 is provided corresponding to each of plural printed boards 111 and operated before unloading the plate 111 to produce a previous announcement signal to a processor 121. A mounting state detection means 141 detects the presence or absence of each board 111 in accordance with the operating state of the means 131. A mounting state store means 151 stores the detecting result of the means 141 in a state readable to the processor 121. Therefore the previous announcement signal is sent to the processor 121 before the board 111 is unloaded and simultaneously the information on the presence or absence of the board 111 is held. Thus, it is possible to shorten the time needed for detection of the mounting state of the board 111 and to prevent the generation of the undecided data.</p> |
