CENTRAL MONITORING METHOD AND CENTRAL MONITORING SYSTEM

• Main Authors: TAKAI HIDEYUKI, TSUBOI KENICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 01.02.2016
• Subjects: ALARM SYSTEMS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ORDER TELEGRAPHS; PHYSICS; SELECTING; SIGNALLING; SIGNALLING OR CALLING SYSTEMS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

PROBLEM TO BE SOLVED: To provide a central monitoring method by which only reply information from a slave station called first can be exchanged even in the case where status changes occur in a plurality of slave stations connected with a master station via a communication line.SOLUTION: When a transmission permission signal is transmitted from a master station 2 to a slave station 4, until an interruption permission time of a different time zone allocated for each slave station beforehand, the slave station 4 discriminates the presence/absence of an interruption request signal from a slave station 4 that is called first and if there is not the request signal, the interruption request signal from the present slave station 4 can be transmitted. According to the present constitution, even if status changes occur in facilities of a plurality of slave stations 4, each time the slave station 4 is called, one interruption request signal is transmitted and only reply information is transmitted. Therefore, since the reply information is accurately transmitted to the master station 2, the central monitoring method which sufficiently monitors/manages the status changes in the slave stations 4 can be provided.SELECTED DRAWING: Figure 1 【課題】親局と通信回線を介して接続される複数の子局において状態変化が生じても、先行して呼出される子局からの返信情報のみを授受することができる中央監視方法を提供する。【解決手段】親局２から送信許可信号が子局４に送信されると、子局４は子局毎にあらかじめ割当てられる異なる時間帯の割込み許可時間になるまで、先行して呼出される子局４からの割込み要求信号の有無を判断し、当該要求信号がない時に自局からの割込み要求信号の送信が可能に構成されている。この構成によれば、複数の子局４の設備に状態変化が生じても、子局４が呼出される毎に１個の割込み要求信号が発信されて返信情報が送信されるのみである。そのため、返信情報は正確に親局２に送信されるので、子局４の状態変化を十分に監視・管理する中央監視方法を提供することができる。【選択図】図１