Communications: electrical – Continuously variable indicating – With meter reading
Patent
1989-04-19
1991-10-29
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
34082512, 340310A, 370 952, H04Q 900
Patent
active
050619225
ABSTRACT:
A signal transmission/monitoring method for a system including a master station and a plurality of slave stations installed on and along a signal transmission line so as to be capable of mutually performing information transmission and reception in such a manner that the master station calls the slave stations through sequential polling with the called slave station sending reply information to the master station. An interrupt enable time zone is provided between a time point at which the call signal transmission from the master station is completed and a time point at which the reply signal transmission from the slave station is started. When other slave station issues an interrupt request within the interrupt enable time zone, signal transmission to the master station from that other slave station is carried out with priority.
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patent: 4609920 (1986-09-01), Segarra
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patent: 4742335 (1988-05-01), Vogt
patent: 4829297 (1989-05-01), Ilg et al.
"Development and Field Test on a Distribution Line Carrier Communication System", Akira Miyahara, et al., IEEE Transactions on Power Delivery, vol. PWRD-1, No. 3, Jul. 1986, pp. 28-34.
"Development of Distribution-Line Information Transmission System", Akira Miyahara et al., Hitachi Hyoron, vol. 65, No. 6, (1983-6) pp. 385-390.
Miyazaki Terunobu
Nakamura Mitsuru
Nakamura Tomoharu
Nishijima Kazuo
Sakou Eisaburo
Hitachi , Ltd.
Holloway III Edwin C.
Yusko Donald J.
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