| 摘要 |
PURPOSE:To momentarily display the state of a station to be supervised by a supervisory station by sending a number being subjected to change in a supervised item in a data content sent from the station to be supervised into the supervisory station when the supervised items of the station to be supervised are changed. CONSTITUTION:The supervised content is sent by giving ON-OFF state to bits provided by the number of supervised items in the supervisory data from a station to be supervised in a conventional system. However, there are disadvantages in this system such that the transmission time is increased in proportion to the number of supervised items and a change in the supervised item is displayed with a delay to the supervisory station. Only the number of supervised items changed in a data format when the supervised items are changed is sent to reduce the transmission speed. |
