Siemens Sinumerik 840D sl Diagnostic Manual page 877

03/2009
Remedy: - check that the encoder cables are routed in compliance with EMC.
- check the plug connections.
- replace the encoder or encoder cable.
- remove any dirt from the coding disk or strong magnetic fields.
231432 <location>Encoder 1: Rotor position adaptation corrects deviation
Message %1
value:
Drive object: All objects
Reaction: NONE
Acknowledge: NONE
Cause: For track A/B, pulses have been lost or too many have been counted. These pulses are presently
being corrected.
Alarm value (r2124, interpret decimal): Last measured deviation of the zero mark distance in incre-
ments (4 increments = 1 encoder pulse). The sign designates the direction of motion when detecting
the zero mark distance.
Remedy: - check that the encoder cables are routed in compliance with EMC.
- check the plug connections.
- replace the encoder or encoder cable.
- check encoder limit frequency.
- adapt the parameter for the distance between zero marks (p0424, p0425).
231443 <location>Encoder 1: Signal level C/D unipolar outside tolerance
Message Fault cause: %1 bin
value:
Drive object: All objects
Reaction: NONE
Acknowledge: NONE
Cause: The unipolar level (CP/CN or DP/DN) for encoder 1 is outside the permissible tolerance.
Alarm value (r2124, interpret binary):
Bit 0 = 1: Either CP or CN outside the tolerance.
Bit 16 = 1: Either DP or DN outside the tolerance.
The unipolar nominal signal level of the encoder must lie in the range 2500 mV +/- 500 mV.
The response thresholds are < 1700 mV and > 3300 mV.
Note:
The signal level is not evaluated unless the following conditions are satisfied:
- Sensor Module properties available (r0459.31 = 1).
- Monitoring active (p0437.31 = 1).
See also: p0491 (Motor encoder fault response ENCODER)
Remedy: - check that the encoder cables and shielding are routed in compliance with EMC.
- check the plug connections and contacts.
- are the C/D tracks connected correctly (have the signal lines CP and CN or DP and DN been inter-
changed)?
- replace the encoder cable.
231500 <location>Encoder 1: Position tracking traversing range exceeded
Message -
value:
Drive object: SERVO, VECTOR
Reaction: OFF1 (NONE, OFF2, OFF3)
Acknowledge: IMMEDIATELY
Cause: For a configured linear axis without modulo correction, the drive/encoder has exceeded the maximum
possible traversing range. The value should be read in p0412 and interpreted as the number of motor
revolutions.
When p0411.0 = 1, the maximum traversing range for a configured linear axis is defined to be 64x (+/-
32x) the setting in p0421.
When p0411.3 = 1, the maximum traversing range for a configured linear axis is preset to the highest
possible value and equals +/-p0412/2 (rounded to whole rotations). The highest possible value
depends on the pulse number (p0408) and fine resolution (p0419).
© Siemens AG 2009 All Rights Reserved
SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
Overview of Alarms
SINAMICS-Alarms
2-877