Code 4073: Compile cycle functions define machine data number %1 several times
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical Compile cycle functions define machine data number %1 several times 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 = Machine data number Definitions: Can only occur when installing compile cycle functi ons. Two different compile cycle applications use the same machine data number. The machine data which was defined twice is shifted into the free number range above 64000. Reaction: Alarm display. Remedy: The error has no effect on the usability of the ma chine data and the function of the compile cycle application. To ensure that the compile cycle machine data documentation is correct, you must contact the supplier of the compile cycle. Only the supplie r can remedy the error by changing the software. 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 4073 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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