Polling control method and system
First Claim
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1. A polling method in a control unit having a plurality of terminal device address for a plurality of terminal devices comprising the steps of:
- sequentially polling to said terminal device addresses;
counting the number of times of non-response to the polling for each of said terminal device addresses; and
partially suppressing the polling to the terminal device address when said count for said terminal device address exceeds a predetermined number.
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Abstract
In a terminal control unit having a polling function to a plurality of terminal devices, the number of times of continuous non-response to the polling is counted for each terminal device address. If the number of times exceeds a predetermined number, a frequency of polling to that terminal device is lowered to eliminate unnecessary polling.
44 Citations
7 Claims
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1. A polling method in a control unit having a plurality of terminal device address for a plurality of terminal devices comprising the steps of:
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sequentially polling to said terminal device addresses; counting the number of times of non-response to the polling for each of said terminal device addresses; and partially suppressing the polling to the terminal device address when said count for said terminal device address exceeds a predetermined number. - View Dependent Claims (2)
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3. A polling control system for polling a plurality of terminal device addresses for a plurality of terminal devices comprising:
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first means for generating a command for sequentially polling said terminal device addresses; second means responsive to said command from said first means for effecting polling; and third means for detecting that the number of times of non-response to the polling exceeds a predetermined number for each of said terminal device address, and lowering a frequency of polling to the terminal device address by said second means. - View Dependent Claims (4, 5, 6, 7)
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Specification