| 摘要 |
PURPOSE:To reduce the time required for extracting on-operation of two-make contacts at an arbitrary position, by driving the 1st decoder circuit, the 2nd decoder circuit and a selector circuit connected to three contacts of the two- make contacts effectively. CONSTITUTION:The two-make contacts each comprising X, Y, Z contacts are arranged in matrix, and in order to extract the on-operating part of the said two-make contacts where the three contacts of the two-make contacts at a specific position are short-circuited each other, the on-operating part is checked with the combination of the 2nd decoder circuit 9 and the selector circuit 10, or the 1st decoder dircuit. When the on-operating part is extracted, the said check is interrupted and the input to the extracted selector circuit is fixed. Further, the checking is done with the combination of the said selector circuit and the 2nd decoder circuit or the 1st decoder circuit, and when one on-operating part is extracted, the checking is restarted with the 1st decoder circuit or the combination of the 2nd decoder circuit 9 and the selector circuit, and it is confirmed for the check after the restart that no on-operating part exists. |
