Siemens SINUMERIK 840D sl Series Diagnostics Manual page 708

Overview of Alarms
Cause: The friction characteristic is incorrect.
Alarm value (r2124, decimal):
1538: The friction torque is greater than the maximum from the upper effective torque limit
(p1538) and zero. This is the reason that the friction characteristic output (p3841) is limited
to this value.
1539: The friction torque is less than the minimum from the lower effective torque limit
(p1539) and zero. This is the reason that the friction characteristic output (p3841) is limited
to this value.
3820 - 3839: Incorrect parameter number, if
the speeds entered in the parameters for the friction characteristic do not correspond to the
following condition:
0.0 < p3820 < p3821 < ... < p3829 <= p0322 or p1082, if p0322 = 0
or
the torques entered in the parameters for the friction characteristic do not correspond to
the following condition:
0 <= p3830, p3831 ... p3839 <= p0333.
Therefore the friction characteristic output (p3841) is set to zero.
See also: r3840
Remedy: Fulfill the conditions for the friction characteristic.
Re alarm value = 1538:
Check the upper effective torque limit, e.g. in the field weakening range.
Re alarm value = 1539:
Check the lower effective torque limit, e.g. in the field weakening range.
Re alarm value = 3820 - 3839:
Fulfill the conditions to set the parameters of the friction characteristic.
207961 <location>Drive: Friction characteristic plot activated
Reaction: NONE
Acknowledge: NONE
Cause: The automatic friction characteristic plot is activated.
The friction characteristic is plotted at the next power-on command.
Remedy: None necessary.
The alarm disappears automatically after the friction characteristic plot has been
successfully completed or the plot is de-activated (p3845 = 0).
207963 <location>Drive: Friction characteristic plot aborted
Reaction: OFF1
Acknowledge: IMMEDIATELY
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005