Code 27097: SPL start not executed
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical SPL start not executed 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: SPL start not executed after predefined timeout in MD SAFE_SPL_START_TIMEOUT. Reaction: Alarm display. Remedy: Find the cause of the failure of the SPL to start. Possible causes may be: - There is an NC or drive error (e.g. after encoder replacement, EMER GENCY STOP, PROFIsafe alarms) - There is a syntax error in the SPL - Safety Integrated alarm present (e.g. "Safe limit position overrun") - Name or path of SPL for PROG_EVENT Start written incorrectly; make sure upper and lower cases are used correctly - Simultaneous start of an ASUB and PROG_EVENT, par ameterization MD 11602 (stop causes e.g. read-in disable) - Problems when calling FB4/FC9 This alarm can be masked via MD $MN_SAFE_DIAGNOSIS_MASK, Bit 1 = 1. Program Continuation: Clear alarm with the RESET key. Restart part program
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 27097 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.
Have a better solution?
Help the industrial community by sharing your repair experience for code 27097.
Need a searchable reference for more Siemens SINUMERIK 840D CNC manuals?
We structure equipment manuals into searchable code, title, cause, solution, safety note, and source-reference data. Send a PDF and example searched codes when you need public pages, private search, or structured exports.
Space reserved for Google AdSense / Industrial Affiliate Links
Monetization target for 2026