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Siemens SINUMERIK Controller
Program/G-code · Basic · 10-15 minutes
Siemens 14600 - Block reload buffer cannot be established
SIEMENS alarm 14600 occurs when the NC interpreter attempts to activate a work offset frame (G54-G59, G505-G599, or FRAME variable) that either exceeds the configured frame table limits defined in machine data MD28082 $MC_MM_NUM_GLOBAL_USER_FRAMES or references an uninitialized frame entry. The alarm triggers during block interpretation when the controller validates the requested frame index against available software options and configured frame memory.
14600
Siemens 14600 - Block reload buffer cannot be established
Block reload buffer cannot be established
The download buffer for "execute from external" could not be created. Possible causes: - Not enough memory available (for minimum see MD18360 $MN_MM_EXT_PROG_BUFFER_SIZE) - No resources available for HMI NCK communication (see MD18362 $MN_MM_EXT_PROG_NUM) - The file already exists Control reaction: Interpreter stop NC Start disable in this channel. Interface signals are set. Alarm display.
Root Cause Summary
SIEMENS alarm 14600 occurs when the NC interpreter attempts to activate a work offset frame (G54-G59, G505-G599, or FRAME variable) that either exceeds the configured frame table limits defined in machine data MD28082 $MC_MM_NUM_GLOBAL_USER_FRAMES or references an uninitialized frame entry. The alarm triggers during block interpretation when the controller validates the requested frame index against available software options and configured frame memory.
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 Active Frame Configuration
Navigate to HMI → Commissioning → Machine Data → Channel-specific data → Frames and verify MD28082 $MC_MM_NUM_GLOBAL_USER_FRAMES value matches your program requirements.
- 2
Verify Software Options
Check HMI → Diagnostics → Software Options to confirm extended work offset option 'Additional Work Offsets' is enabled if using G505-G599 range.
Software option changes require controller restart to take effect.
- 3
Adjust Program or Configuration
Either modify the NC program to use valid frame numbers within configured limits, or increase MD28082 value and perform a controller restart.
Increasing frame memory affects system memory allocation - consult machine documentation for limits.
Call a technician if:
- ·Memory diagnostic reveals hardware failure
- ·Software option activation fails
- ·Frame corruption persists after restoration
Prevention
- Regular frame data backups using Archive function
- Implement program validation routines for parametric frame selection
- Monitor MD28082 settings during software updates
Common Mistakes
- Assuming G54-G59 are always available without checking configuration
- Using extended frames without verifying software options
- Not validating variable ranges in parametric programming
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