Siemens SINUMERIK 840D sl Series Diagnostics Manual page 738

Overview of Alarms
Cause: A fault occurred on the power module that cannot be interpreted by the control unit
firmware. This can occur if the firmware on the power module 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 power module by an older firmware version (r0128).
- upgrade the firmware on the control unit (r0018).
230903 <location>Power module: I2C bus
Reaction: NONE
Acknowledge: NONE
Cause: Communications with EPROM not possible
Fault value (r0949, hexadecimal):
Only for internal Siemens troubleshooting.
Remedy: Replace module
230907 <location>Power module: FPGA configuration unsuccessful
Reaction: OFF2 (DCBRAKE, NONE, OFF1, OFF3, STOP1, STOP2)
Acknowledge: IMMEDIATELY
Cause:
Remedy:
230920 <location>Power module: 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 sensor is connected correctly.
- replace sensor.
230999 <location>Power module: Unknown alarm
Reaction: NONE
Acknowledge: NONE
Cause: An alarm occurred on the power module that cannot be interpreted by the control unit
firmware. This can occur if the firmware on the power module 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 power module by an older firmware version (r0128).
- upgrade the firmware on the control unit (r0018).
231100 <location>Encoder 1: Zero mark clearance error
Reaction: A_INFEED: NONE (DCBRAKE, OFF1, OFF2, OFF3, STOP1, STOP2)
SERVO: ENCODER (DCBRAKE, NONE, OFF1, OFF2, OFF3, STOP1, STOP2)
Acknowledge: READY
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005