Loop communication system

Details Loop communication system Loop communication system

1990-05-16

1991-09-17

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

34082501, 370 8512, 370 8515, H04Q 300

Patent

active

050498711

ABSTRACT:
A loop transmission system includes a plurality of micronodes and a central processor operative as a supervisory station linked by two loop transmission lines each capable of transmitting in either direction around the loop. The central processor is adapted to transmit, in alternative cycles in a first then in a second direction about the loop. Each micronode is adapted to respond in a direction opposite to the direction of the command transmission. The system is operative to provide alternative transmission paths in opposite directions around the loop such that if a fault occurs, the system retransmits the prior command in the opposite direction during a next cycle of operation. At most, a one cycle delay occurs, yet the system is inexpensive and easy to install.

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H. D. Toong, "Microprocessors", Scientific American, Sep. 1977, pp. 146, 147, 151, 152, 153, 154, 155, 156, 157, 158, 161.

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