Code 207841: <location>Drive: Infeed operation withdrawn
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical <location>Drive: Infeed operation withdrawn alarm.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: Drive object: SERVO, VECTOR Reaction: OFF2 (NONE, OFF1, OFF3) Acknowledge: IMMEDIATELY Cause: The signal "infeed operation" was withdrawn in operation. - interconnection of the binector input for the signal "infeed operation" is either incorrect or missing (p0864). - the enable signals of the infeed were disabled. - due to a fault, the infeed wit hdraws the signal "infeed operation". Remedy: - check the interconnection of the binector input for the signal "infeed operation" (p0864). - check the enable signals of the infeed and if required, enable. - remove and acknowledge an infeed fault. Note: If this drive is intended to back-up the DC link regeneratively, then the fault response must be parameterized for NONE, OFF1 or OFF3 so that the driv e can continue to operate even after the infeed fails.
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 207841 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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