| 摘要 |
PURPOSE:To detect an emergency stop position by providing a first abnormal stop switch at a door body power circuit, while providing a second abnormal stop switch at a power supply circuit to stringing, and a breaker circuit against the occurrence of an error. CONSTITUTION:A sub-control section 10 at each door body 3 issues a drive instruction to a drive means 7, when a double-acting control instruction is outputted from a main control section 11 with a single-double acting selector switch 19 selected at double acting mode, thereby causing the door body 3 to enter double action. Then, the sub-control section 10, upon receipt of an abnormal stop signal from an error detecting means 22, issues an open instruction to the first abnormal stop switch 23 for the emergency stop of the door body 3 and at the same time, sends an error detection signal to the main control section 11. The main control section 11, upon receipt of the signal, sends an abnormal stop signal to all the door body sub-control sections 10, and the first abnormal stop switch 23 is thereby opened for interrupting power supply to the drive means 7. As a result, the door body 3 stops after slight motion. |
