| 摘要 |
The invention relates to a method for detecting undesired operating conditions of a driving device. A sensor (50) that is transformer-coupled between a stator side and a rotor side is triggered by a control circuit (40) for detecting a position value or a rotational speed value of the drive mechanism. An error signal (F) is emitted, if an undesired operating condition occurs. A test signal (&egr;) is supplied to a safety monitoring device (30) in order to determine and emit this error signal (F), said test signal being also supplied to the control circuit (40). There, the test signal (&egr;) acts as an unbalance and is checked as regards its presence in the safety monitoring device.
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