Siemens SINUMERIK 840D sl Series Diagnostics Manual page 908

Overview of Alarms
Remedy: • Valve without valve slide checkback signal: Modify MD 5530: reset bit 2
• Check the valve connection.
Program Con- Clear alarm with the RESET key in all channels of this mode group. Restart part program.
tinuation:
310608
Axis %1 drive %2 speed controller at limit
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: The speed controller output is lying for an impermissibly long time at its limit (MD 5605:
$MD_SPEEDCTRL_LIMIT_TIME and MD 1606: (speed controller limit threshold). The
monitoring system is only active when the speed setpoint is below the speed threshold in
MD 5606: SPEEDCTRL_LIMIT_THRESHOLD (speed controller limit threshold).
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: • Is the drive blocked?
• Is the encoder connected? (check the encoder cable)
• Check the shield connection on the encoder cable
• Encoder defective?
• Check the encoder resolution
• The Uce monitoring circuit has been activated (perform a reset by switching the power
supply off and on again).
• Replace the control module.
• Modify MD 5605: SPEEDCTRL_LIMIT_TIME and MD 5606:
SPEEDCTRL_LIMIT_THRESHOLD in accordance with the mechanical and dynamic fea-
tures of the axis.
Program Con- Clear alarm with the RESET key in all channels of this mode group. Restart part program.
tinuation:
310609
Axis %1 drive %2 encoder cut-off frequency exceeded
Parameters: %1 = NC axis number
%2 = Drive number
Definitions: Actual velocity value exceeds encoder limit frequency fg,max = 650kHz
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: • The wrong encoder may be in use.
• Does the number of encoder lines match the setting in MD 5005:
ENC_RESOL_MOTOR (encoder resolution for motor measuring system)?
• Is the encoder cable connected correctly?
• Is the encoder cable shield installed flat?
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005