| 摘要 |
PURPOSE:To notify the abnormal state by delivering an alarm to the outside if a motor does not enter into operating state due to insufficient contact of main contacts in an electromagnetic contactor or insufficient connection of the main circuit upon receiving an operation command to a motor controller. CONSTITUTION:If the current value of a main circuit 1, detected by a current detection circuit 11a, does not vary when a signal for driving an electromagnetic contactor 4 to operate a motor 2 is delivered to a drive circuit 11c, the logic operation circuit 11d in a control circuit 11 makes a decision that the electromagnetic contactor 4 or the main circuit 1 is connected insufficiently. It is notified on a display circuit 11e, and a fault output relay 11f is driven to deliver an alarm. |
