Microprocessor-controlled hoist system
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United States of America Patent
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Jan 13, 1987
Grant Date -
N/A
app pub date -
May 24, 1983
filing date -
May 24, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Load position limits and incremental lowering of a load are controlled by a microprocessor forming an interface between an operator's control station and the hoist. Other hoist status conditions such as underspeed and overspeed of the hoist motor are detected by the microprocessor based upon hoist speed during the position limit setting cycle. Still other hoist status data such a motor overheating, number of power-up cycles, number of under and overspeed shut-downs, number of power failures, etc. are input to the microprocessor and all such data as up-dated are entered into a non-volatile memory which, when extracted, permits maintenance scheduling.
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