| 摘要 |
PURPOSE:To vary the priority easily, by providing a circuit giving priority information in response to the state of use of a device to be connected for a priority selection circuit. CONSTITUTION:Priority instruction relays AT0-ATN receive an instruction from a scanning control SC, and a corresponding relay among priority selection relays P0-PN receives the priority. When AT2 priority information is received from the circuit SC, for example, the priority instruction relay AT2 is operated, and the operated contacts form the following circuits; 1 ground-at2 operated contact-p2 contact-...(omitted)-atn contact-pn contact-ck operated contact-ato contact-p0 contact-at1 contact-p1 contact-at2 operated contact-P0-PN path is formed, where CK is a check relay and 1 shows ground, and the P2 relay receives the highest priority. Thus, the priority of the relays P0-PN is changed according to the priority instruction relays AT0-ATN received from the SC. |
