Siemens SINUMERIK 840D sl Series Diagnostics Manual page 752

Overview of Alarms
231899 <location>Encoder 1: Unknown fault
Reaction: A_INFEED: OFF2 (DCBRAKE, NONE, OFF1, OFF3, STOP1, STOP2)
SERVO: ENCODER (DCBRAKE, NONE, OFF1, OFF2, OFF3, STOP1, STOP2)
Acknowledge: IMMEDIATELY (POWER ON)
Cause: A fault occurred on the sensor module for encoder 1 that cannot be interpreted by the
control unit firmware.
This can occur if the firmware on the sensor module for encoder 1 is more recent than the
firmware on the control unit.
Fault value (r0949, decimal):
Fault number.
If required, the significance of this new fault can be read about in a more recent description
of the control unit.
Remedy: - replace the firmware on the sensor module by an older firmware version (r0148).
- upgrade the firmware on the control unit (r0018).
231905 <location>Encoder 1: Parameteriz. error
Reaction: A_INFEED: OFF2 (NONE, OFF1)
SERVO: ENCODER (DCBRAKE, NONE, OFF1, OFF2, OFF3, STOP1, STOP2)
Acknowledge: IMMEDIATELY
Cause: A parameter of encoder 1 was detected as being incorrect.
It is possible that the parameterized encoder type does not match the connected encoder.
The parameter involved can be determined as follows:
- determine the parameter number using the fault value (r0949).
- determine the parameter index (p0187).
Fault value (r0949, decimal):
Parameter number.
Remedy: - check whether the connected encoder type matches the encoder that has been
parameterized.
- correct the parameter specified by the fault value (r0949) and p0187.
231920 <location>Encoder 1: Temperature sensor fault
Reaction: NONE
Acknowledge: NONE
Cause: When evaluating the temperature sensor, an error occurred.
Alarm value (r2124, decimal):
1: Wire breakage or sensor not connected (KTY: R > 1630 Ohm).
2: Measured resistance too low (PTC: R < 20 Ohm, KTY: R < 50 Ohm).
Remedy: - check that the encoder cable is the correct type and is correctly connected.
- check the temperature sensor selection in p0600 to p0603.
- replace the sensor module (hardware defect or incorrect calibration data).
231999 <location>Encoder 1: Unknown alarm
Reaction: NONE
Acknowledge: NONE
Cause: A alarm has occurred on the sensor module for encoder 1 that cannot be interpreted by the
control unit firmware.
This can occur if the firmware on the sensor module for encoder 1 is more recent than the
firmware on the control unit.
Alarm value (r2124, decimal):
Alarm number.
If required, the significance of this new alarm can be read about in a more recent
description of the control unit.
Remedy: - replace the firmware on the sensor module by an older firmware version (r0148).
- upgrade the firmware on the control unit (r0018).
2-752
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005