| 摘要 |
<p>PURPOSE:To attain the control of the self-history while a printed card to be history-controlled itself is used by providing a rewritable memory and recording the history of its own such as the name, manufacturing number and remodelling of a printed card in the memory. CONSTITUTION:In a printed card, a non-volatile rewritable memory 11 is provided, and in a memory 11, the name and manufacturing number of the printed card and the printed card history such as the history of remodeling and virsion-up, and the history of the trouble generation and repairing are written. Namely, when a selecting control circuit 15 selects a memory writing/reading device 13 side with a selecting switch 14, the writing data from the device 13 are written through the connector of the printed card to the memory 11 by a memory access control circuit 16. When a plant controller 12 side is selected by a switch 14, the controller 12 can read the data in the memory 11 through circuits 15 and 16, etc. Thus, by using the printed card to be history- controlled itself, the self-history can be controlled.</p> |
