Siemens SINUMERIK 840D Diagnostics Manual page 560

1 Alarms
Remedy:
Program Continuation:
300609
Parameters:
Definitions:
Reactions:
1-560
Please inform the authorized personnel/service department.
• Is the motor blocked, overloaded or the brake closed?
• If permitted by the power section, set the limits for torque, performance and current to
higher values.
• Is the motor connected to ground?
• Check the motor converter connection (phase missing, incorrect rotary field).
• Check the encoder resolution.
• Check the encoder, encoder cable and shield connection for loose contact or cable
breakage.
• Check the direction of rotation of the encoder tracks (e.g. gearwheel encoder MD 1011:
$MD_ACTUAL_VALUE_CONFIG bit 1)
• Is the encoder cable appropriate for the encoder type?
• Check the controller settings (e.g. after software exchange).
• Check the motor protection.
• DC link voltage available?
• Check the DC link connections (check that the screws are tight).
• The Uce monitoring circuit has been activated (perform a reset by switching the power
supply off and on again).
• Modify MD 1605: $MD_SPEEDCTRL_LIMIT_TIME and MD 1606:
$MD_SPEEDCTRL_LIMIT_THRESHOLD in accordance with the mechanical and
dynamic features of the axis.
• Default values for FDD:
• MD 1605 = 200 ms
• MD 1606 = 8000 rpm
• Default values for MSD:
• MD 1605 = 200 ms
• MD 1606 = 30 rpm
• Replace the motor (encoder is defective, motor has a winding or ground fault or a short
circuit)
• With linear motors:
• Check actual value inversion.
• Check the reduction of the max. motor current MD 1105
MD_MOTOR_MAX_CURRENT_REDUCTION and increase the value if necessary.
• Check connection of motor cables.
• Are the motors arranged correctly in a parallel circuit and is their electrical interconnec-
tion correct?
Clear alarm with the RESET key in all channels of this mode group. Restart part program.
Axis %1 drive %2 encoder cut-off frequency exceeded
%1 = NC axis number
%2 = Drive number
Actual speed value exceeds encoder limit frequency fg,max = 650kHz;
fg = nist * MD 1005
- 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.
 Siemens AG, 2004. All rights reserved
SINUMERIK 840D/840Di/810D Diagnostics Guide (DA), 10.04 Edition
10.04