Siemens SINUMERIK 840D sl Series Diagnostics Manual page 836

Overview of Alarms
%2 = Drive number
Definitions: There is a difference of more than 45° electrical between the present rotor position (C/D
track) and the new rotor position as determined by fine synchronization. Faults may have
occurred in the encoder or zero marker signals.
The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY
(channel not ready).
Reactions: - Mode group not ready.
- The NC switches to follow-up mode.
- Channel not ready.
- NC Start disable in this channel.
- Interface signals are set.
- Alarm display.
- NC Stop on alarm.
- Channel not ready.
Remedy: • Use original Siemens encoder cables (they have a higher degree of screening).
• Check the encoder, encoder cables and screen connection for damage.
• Check the shield connection on the front plate of the controller module (top screw).
• Replace the control module.
• Check MD 1016 $MD_COMMUTATION_ANGLE_OFFSET (commutation angle offset).
Program Con- Switch control OFF - ON.
tinuation:
300508
Axis %1 drive %2 zero mark monitoring of motor measuring system
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: An error was detected in the number of encoder lines counted to modulo (16/10) on
crossing of the zero marker. Increments were lost or added.
The alarm can be reprogrammed in the MD ALARM_REACTION_CHAN_NOREADY
(channel not ready).
Reactions: - Mode group not ready.
- The NC switches to follow-up mode.
- Channel not ready.
- NC Start disable in this channel.
- Interface signals are set.
- Alarm display.
- NC Stop on alarm.
- Channel not ready.
Remedy: Please inform the authorized personnel/service department.
• Use original Siemens encoder cables (they have a higher degree of screening).
• Check the encoder, encoder cable and shield connection for loose contact or cable
breakage.
• Check the shield connection on the front plate of the controller module (top screw).
• For a gearwheel encoder, check the distance between the gearwheel and the sensor.
• Replace the encoder, encoder cable or control module.
• Check the metallized intermediate circuit cover.
• If a BERO proximity switch is used, the zero marker of the encoder is still being moni-
tored and not the BERO signal.
Program Con- Switch control OFF - ON.
tinuation:
300509
Axis %1 drive %2 converter frequency exceeded
2-836
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005