Polling method and apparatus for a digital processing system

Details Polling method and apparatus for a digital processing system Polling method and apparatus for a digital processing system

1996-03-18

1999-08-17

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

370449, 370346, 395839, 395289, 395837, 395727, G05B 2300

Patent

active

059399996

ABSTRACT:
A polling method and apparatus for polling from a control unit to a plurality of controlled units using an information collecting command in order to collect status information from each controlled unit in a digital processing system by continuously monitoring the status of the controlled units. The apparatus determines, in the control unit, whether there is any one of the controlled units which is not mounted or has failed. Status information is returned from each controlled unit to the control unit when the control unit determines a normal state of the controlled unit. Response information is returned from the controlled unit to the control unit instead of the status information when the control unit determines an abnormal state of the controlled unit.

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