| 摘要 |
PURPOSE:To surely detect the whole condition of a motor which can be generated in the case of driving an opening/closing body such as shutter by the use of a tube motor, and enable an external operator to exactly grasp the condition of the motor by light emitting display or the like. CONSTITUTION:A contact 36 for ascent and a contact 37 for descent are respectively provided on the two polar lines 32b, 32c of a motor M. The opening/ closing condition of these respective contacts 36, 37 are output to a condition discriminating part 20 as binary signals respectively detected by an ascent detecting circuit 1 and a descent detecting circuit 8, and the current of a common line 32a is output from a common detecting circuit 16 to the condition discriminating part 20 as a binary signal through a current detecting means 15. In the condition discriminating part 20, the condition of tone motor M (during ascent, during descent, on the upper limit position, on the lower limit position, at intermediate stop, at thermal motion) can be wholly discriminated by the logic of combination of these three kinds of input. |
