Siemens SINUMERIK 840D sl Series Diagnostics Manual page 710

Overview of Alarms
Cause: The automatic encoder adjustment is activated.
The automatic encoder adjustment is carried-out with the next power-on command.
See also: p1990
Remedy: None necessary.
The alarm automatically disappears after the encoder has been successfully adjusted or
for the setting p1990 = 0.
207990 <location>Drive: Incorrect motor data identification
Reaction: OFF2 (NONE, OFF1)
Acknowledge: IMMEDIATELY
Cause: A fault has occurred during the identification routine.
Fault value (r0949, decimal):
1: Current limit value reached.
2: Identified stator resistance lies outside the expected range 0.1 ... 100 % of Zn.
3: Identified rotor resistance lies outside the expected range 0.1 ... 100 % of Zn.
4: Identified stator reactance lies outside the expected range 50 ... 500 % of Zn.
5: Identified magnetizing reactance lies outside the expected range 50 ... 500 % of Zn.
6: Identified rotor time constant lies outside the expected range 10 ms ... 5 s.
7: Identified total leakage reactance lies outside the expected range 4 ... 50 % of Zn.
8: Identified stator leakage reactance lies outside the expected range 2 ... 50 % of Zn.
9: Identified rotor leakage reactance lies outside the expected range 2 ... 50 % of Zn.
10: Motor has been incorrectly connected.
11: Motor shaft rotates.
20: Identified threshold voltage of the semiconductor devices lies outside the expected
range 0 ... 10 V.
30: Current controller in voltage limiting.
40: At least one identification contains errors. The identified parameters are not saved to
prevent inconsistencies.
50: With the selected current controller sampling rate, the pulse frequency cannot be
implemented.
Note:
Percentage values are referred to the rated motor impedance:
Zn = Vmot.nom / sqrt(3) / Imot,nom
Remedy: Re fault value = 0:
Check whether the motor is correctly connected. Observe the configuration (star-delta).
Re fault value = 1 ... 40:
- check whether the motor data have been correctly entered into p0300, p0304 - p0311.
- is there an appropriate relationship between the motor power rating and that of the motor
module? The ratio of the motor module to the rated motor current should not be less than
0.5 and should not be greater than 4.
- check the motor configuration (star-delta).
Re fault value = 4, 7:
Check whether inductances are correctly entered in p0233 and p0353.
Re fault value = 50:
Reduce the current controller sampling rate.
207991 <location>Drive: Motor data identification activated
Reaction: NONE
Acknowledge: NONE
Cause: The motor data identification routine is activated.
The motor data identification routine is carried-out at the next power-on command.
Remedy: None necessary.
The alarm automatically disappears after the motor data identification routine has been
successfully completed or for the setting p1900 = 0.
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005