REMOTE SUPERVISORY SYSTEM

• Main Authors: KAWAI MASAHISA, ITOU HIDEAKI
• Format: Patent
• Language: English
• Published: 04.08.1983
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; SELECTING

PURPOSE:To realize an efficient remote supervision, by providing plural combinations of supervisory items designated by a master station and scanning slave stations in a proper supervisory cycle for every combination and allowing the master station to make designated supervisory items different in accordance with supervision time. CONSTITUTION:The time chart of an example is shown in figure, and AB, AC, AD- indicate scanning of transmission from the master station to slave stations, and BA, CA, DA- indicate responses of tansmission from the master station to slave stations. Now, when unattended stations of the radio line are taken as slave stations to explain the system, plural kinds of supervision cycle are provided, for example, slave stations are supervised once in a day in respect to item ''fuel quantity of generator'' and are supervised twice in a day in respect to item ''outside air temperature'' and are supervised once in an hour in respect to item ''door lock'', and a combination of supervisory items is made in every pertinent supervision cycle to scan slave stations. Thus, though scanning times TT1, TT2, TT3... per one supervision are different by the supervision time, the average scanning time per one supervision is shortened considerably.