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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 69000 - Channel block :
Alarm 69000 is a user cycle alarm generated by machine manufacturer custom NC programs or PLC logic, not a native SINUMERIK system alarm. It indicates a servo-related fault detected during block execution that has been explicitly programmed into the machine's application software. The actual cause depends entirely on the machine manufacturer's diagnostic logic within their custom cycles.
69000
Siemens 69000 - Channel block :
Channel block
References: The current alarm text, the error description and the remedial measures for the user cycle alarms can be found in the Programming Guide of the machine manufacturer Control reaction: Interpreter stop NC Start disable in this channel. Interface signals are set. Alarm display. NC Stop on alarm at block end.
Root Cause Summary
Alarm 69000 is a user cycle alarm generated by machine manufacturer custom NC programs or PLC logic, not a native SINUMERIK system alarm. It indicates a servo-related fault detected during block execution that has been explicitly programmed into the machine's application software. The actual cause depends entirely on the machine manufacturer's diagnostic logic within their custom cycles.
Safety
- Only qualified personnel should diagnose and clear control alarms; follow the machine builder's safety procedures and lockout/tagout where hardware work is required.
Causes and Fixes
- 1
Check machine manufacturer's Programming Guide or Parameter Documentation for Channel %1 alarm definitions specific to your machine model. The diagnostic text is OEM-programmed, not Siemens-native.
Do not attempt to modify or suppress this alarm without OEM approval—it may mask mechanical faults.
- 2
Verify servo parameters in SINUMERIK: Access Diagnostics > Parameters > Axis-Specific > MD32400 (Max. Following Error) and MD32410 (Following Error Monitoring). Check if values are appropriate for your machine's mechanical design and load.
- 3
Perform manual axis jog (Manual mode, soft-keys: Axis > Jog) on Channel %1 to verify smooth motion without stick-slip. If axis exhibits jerky movement or stalls, suspect servo coupling wear, encoder cable damage, or motor winding fault.
- 4
Check Block %2 in the active NC program for rapid movements (G00 with high feedrate override) or acceleration-limited blocks. Reduce programmed feedrate by 25% and re-run cycle to isolate if servo can track at lower speed.
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Always verify with your machine manual or a certified technician before performing service procedures.