Code 201672: <location>SI Motion: Motor Module software/hardware incompatible
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical <location>SI Motion: Motor Module software/hardware incompatible 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
Message value: %1 Drive object: SERVO, VECTOR Reaction: OFF2 Acknowledge: IMMEDIATELY (POWER ON) Cause: The existing Motor Module software does not support sa fe motion monitoring or is not compatible to the software on the Control Unit or there is a communications error between the Control Unit and Motor Module. Note: This fault results in a STOP A that cannot be acknowledged. Fault value (r0949, interpret decimal): 1: The existing Motor Module software does not support the safe motion monitoring function. 4, 5, 7: The existing Motor Module software is not compatible to the software on the Control Unit. 2, 3, 6, 8: There is a communications error between the Control Unit and Motor Module. Remedy: - check whether there are faults in the safety function alignment between the Control Unit and the Motor Module involved (F01655, F30655) and if required, carry out the appropr iate diagnostics routine for the particular faults. Re fault value = 1: - use a Motor Module that supports safe motion monitoring Re fault value = 4, 5, 7: - upgrade the Motor Module software. Re fault value = 2, 3, 6, 8: - check whether there is a DRIVE-CLiQ communication error between the Control Unit and the Motor Module involved and, if required, carry out a diagnostics routine for the faults identified. Note: SI: Safety Integrated SINAMICS-Alarms Diagnostics Manual (DAsl), 03/2009
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 201672 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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