Polling communication system with priority control

Details Polling communication system with priority control Polling communication system with priority control

1989-12-07

1992-07-21

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082507, 34082551, 370 858, G05B 2300

Patent

active

051326809

ABSTRACT:
A communication system including a master station, a plurality of slave stations each for communicating with the master station, a two-way transmission line connecting the master station and the plurality of slave stations. Each of the slave stations sends a request for further communication with the master station, to the master station when its own slave station is allowed to communicate with the master station and its own slave station has the above request. The master station detects the request for further communication with the master station in a signal sent from a slave station, and memorizes the slave station from which the request for further communication with the master station is detected, until an allowance signal is sent to the slave station from the master station corresponding to the memorizing of the slave station. The master station has a cyclic address pointer which points to an address of a next one of the slave stations in a cyclic order when no slave station is memorized in the master station. The master station outputs the allowance signal to communicate with the master station to a slave station which is memorized in the master station or to a slave station the address of which is pointed to by the cyclic address pointer when no request is memorized in the master station.

REFERENCES:
patent: 3702008 (1972-10-01), Groth
patent: 4500989 (1985-02-01), Dahod
patent: 4595921 (1986-06-01), Wang et al.
patent: 4742512 (1988-05-01), Akashi et al.
patent: 4763323 (1988-08-01), Nelson et al.
patent: 4924461 (1990-05-01), Amemiya et al.

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