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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 100100 - Record length reached
SIEMENS alarm 100100 'Record length %1 reached' occurs when the SINUMERIK system's internal data recording buffer has exceeded its maximum capacity. This typically happens during trace recording, measurement functions, or when diagnostic data collection reaches predefined memory limits in the NCK or HMI subsystems.
Siemens 840D 100100 - Record length reached
Record length reached
Siemens SINUMERIK operator message 100100: Record length reached. This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.
Root Cause Summary
SIEMENS alarm 100100 'Record length %1 reached' occurs when the SINUMERIK system's internal data recording buffer has exceeded its maximum capacity. This typically happens during trace recording, measurement functions, or when diagnostic data collection reaches predefined memory limits in the NCK or HMI subsystems.
Safety
Causes and Fixes
Check active trace recordings
Navigate to Diagnostics > Service > Trace and verify if any trace recordings are currently active or stuck in recording mode.
Use CTRL+T shortcut to quickly access trace functions
Clear trace buffer
Stop all active traces and clear the trace buffer via 'Delete all traces' function in the trace menu.
Save any required trace data before clearing as this action is irreversible
Adjust trace parameters
Check MD11600 TRACE_RECORD_LENGTH and MD11610 TRACE_BUFFER_SIZE settings. Reduce recording duration or increase buffer size if memory permits.
Set trace trigger conditions more precisely to avoid unnecessary data collection
Restart NCK if necessary
If buffer cannot be cleared, perform NCK reset via Startup > Reset > NCK Reset to reinitialize trace subsystem.
Call a technician if:
Prevention
Common Mistakes
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