Code 27098: SPL commissioning phase terminated
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical SPL commissioning phase terminated 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
Definitions: The SPL commissioning phase has just been terminated by changing MD $MN_PREVENT_SYNACT_LOCK. After the next Power ON, file /_N_CST_DIR/_N_SAFE_SPF is subject to the monitoring mechanis ms defined for the SPL (access prot ection, checksum calculation). Changes to the SPL can only be made in the unprotected mode. Reaction: Alarm display. Remedy: Perform a control Power ON. Check and document any changes to the logic in the SPL by means of an acceptance test. Program Continuation: Switch control OFF - ON.
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 27098 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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