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公开(公告)号:EP0366775A4
公开(公告)日:1991-06-05
申请号:EP89905915
申请日:1989-04-11
申请人: SQUARE D COMPANY
CPC分类号: G05B19/05 , G05B2219/1151 , G05B2219/1159 , G05B2219/13064 , G05B2219/15102
摘要: A drum-type sequencer operable in a ladder logic program and capable of being selectively stepped in various modes; that is, in forward stepped sequence, non-sequentially, and backwardly.