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Code 15110: [Channel %1: ] Block %2 REORG not possible

Issue Description & Safety Warning

The Siemens SINUMERIK 840D CNC has triggered a critical [Channel %1: ] Block %2 REORG not possible alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.

Official Troubleshooting Steps

Parameters: %1 = Channel number %2 = Block number, label Definitions: In order to synchronize the preprocessing run and t he main run with REORG, the control accesses modification data which are maintained in a logfile. T he alarm indicates that no more capacity is available in the logfile for the s pecified block in the channel. The alarm message means that the logfile has been deleted in order to obtain additional memory for program reorganization. Consequently, it is no long er possible to REORG the preprocessing memory up to the next coincidence point. Reaction: Alarm display. Remedy: Please inform the authorized personnel/service depar tment. No remedial measures are available for the further execution of the current part program, however: 1. Reduce log file size requirement by: Reducing the distance between the preprocessing and the main run via appropriate preprocessing stops (STOPRE). 2. Increase the size of the logfile by means of the channel-specific machine data: Modify MD28000 $MC_MM_REORG_LOG_FILE_MEM and Modify MD MD28010 $MC_MM_NUM_REORG_LUD_MODULES Program Continuation: Alarm display showing cause of alarm disapp ears. No further operator action necessary.

Source: SINUMERIK 840D sl / 840Di sl / SINAMICS S120 Diagnostics Manual (DAsl, 03/2009)

Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.

About Siemens SINUMERIK 840D CNC Alarms

Siemens controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 15110 on the SINUMERIK 840D CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Siemens's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.

Complete Alarm List: 4014 Siemens SINUMERIK 840D CNC codes.

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