Lenze E94AxPExxxx - Manual (Page 641)

Lenze · 9400 Servo PLC· Reference manual · DMS 4.0 EN · 11/2013 · TD05/06
641
14 Diagnostics & fault analysis
14.6 Maloperation of the drive
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14.6 Maloperation of the drive
The motor does not rotate.
With a positive speed setpoint selection, the motor rotates counter-clockwise instead of clockwise
(when looking at the motor shaft).
The maximum current (C00022) flows and the motor does not rotate according to the defined
speed setpoint.
Cause Remedy
DC-bus voltage is too low. Check mains voltage.
Controller is inhibited. Deactivate controller inhibit (can be set by several
sources).
Motor holding brake is not released. Release motor holding brake.
Quick stop is active Deactivate quick stop
Setpoint = 0 Select setpoint.
Cause Remedy
Feedback system is not connected in correct phase
relation.
Connect feedback system in correct phase relation.
Cause Remedy
Two motor phases are interchanged, i.e. an anti-
clockwise rotating field is applied to the motor.
Carry out the following steps for verification:
1.Ensure that the motor shaft is not blocked and can
rotate freely without damaging the system.
2.Activate the "U-rotation test mode" for the motor
control ( C00398 = "1").
• In this test mode a voltage phasor with the
frequency set in C00399/1 and the amplitude from
the linear characteristic of rated voltage and rated
frequency is applied to the machine, which
corresponds to a clockwise rotating field.
•  Danger!
When the test mode is active, the parameterisable
error response "Quick stop by trouble" has no
effect!
If the test mode is active and a monitoring function
responds with this error response, no quick stop is
executed but the motor continues to rotate with
the frequency set for the test mode!
3.Increase the frequency step by step for the test mode
in C00399/1 until the motor shaft starts to rotate.
• If the motor shaft does not rotate, check the
electrical connection.
4.While the motor shaft is rotating, check whether it
rotates clockwise when looking at the A end shield. If
not, two motor phases are interchanged.
5.Additionally check whether the actual speed value
shown in C00051 is positive and whether it
corresponds to the defined frequency, taking the
number of pole pairs of the machine into
consideration ( C00059 ). If this is not the case, the
connection and the parameter setting of the
feedback system are to be checked.
6.Deactivate the test mode for the motor control again
( C00398 = "0").