| 摘要 |
PURPOSE:To improve the transmission efficiency of the whole system including other terminals, by sending a completion answer signal to a transmission circuit when one terminal controller is not supplied with the electric power. CONSTITUTION:As transactions of terminal controllers 12-20 are completed and power feed switch 7 is turned off, the contacts of electromagnetic switch 7' and circuit end switch 48 are connected to side A to stop the operation of part (a) while putting part (b) in operation. Through reception part 1', transmission part 2' and completion signal transmission part 3' of this part (b), an answer to the transmission circuit is continued even after the power source is turned off, thereby continuing the transmission of the completion signal. Therefore, a polling signal, etc., for a multipoint system are not sent to the said completion signal transmission terminal, so that the efficiency of the whole system is improved. |
