| 摘要 |
PURPOSE:To obtain high transmission efficiency by constituting the system to periodically transmit display informations in the normal state and to transmit voltage informations or current informatons in response to commands when required. CONSTITUTION:When no selective information is transmitted through a transmission line 5b, only display informations are transmitted to a transmission line 5a through a series-parallel converter 4 and a transmission circuit 5. When selective informations are transmitted through a transmission line 5b, a transmission circuit 11 receives the information and transmits to a relay circuit 10, which inform a control circuit 13 of reception of the selective informations, then the control circuit 13 actuates an AD converter 9 through a line 13b and controls the scanning operation of a scanner 3 through a line 13a to send a voltage information following the display informations. The scanner 3 makes the control signal of a line 13a inactive level and gives only the output of the AD converter 9 to a line 2a. |
