Communication port control system

Details Communication port control system Communication port control system

1996-11-19

1998-05-26

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

34082508, 34082551, 370449, H04Q 100

Patent

active

057572763

ABSTRACT:
A communication port control system which controls the use of communication ports for making a communication between a main station and a plurality of sub stations, and includes a processing unit for processing data received from the sub stations, and a logical sum unit for obtaining a logical sum of the data received from the sub stations and for supplying the logical sum to the processing unit via the communication ports. A judging unit is provided in the control system for judging a sub station number of the sub station from which the data received by the logical sum unit originates and for supplying the sub station number to the processing unit. The logical sum unit receives the data from only one of the sub stations at one time.

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