摘要 |
A method is disclosed for controlling a crane which comprises a boom that ma y be raised or lowered by angular adjustment of the boom about a base portion of the crane. The method prevents operation of the crane in an undesired condition by continuously monitoring operation of the crane, including monitoring at least the positio n of the boom with respect to the base of the crane. If the crane approaches a limit of it s operating range or any operational parameter, its operation will be controlled so as t o selectively prohibit or permit a boom raising operation of the crane, depending on the cause of the condition, rather than uniformly prohibit such an operation.
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