Code 112201: Contour is step in current automatic chain%nMachining not possible.
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical Contour is step in current automatic chain%nMachining 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
Definitions: The contour is an element of a program l oaded under "Machine auto" and cannot be deleted or renamed. After the program has been started, the integrated contours cannot be changed under "Program" while the program is running. Reaction: Alarm display. Remedy: Stop the program and load it under "Program". Remove the contour from the program. Program Continuation: Internal
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 112201 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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