Code 207914: <location>Flux out of tolerance
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical <location>Flux out of tolerance 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 Acknowledge: IMMEDIATELY Cause: The difference between the flux actual val ue and setpoint has exceeded the tolerance: abs(r0084 - r1598) > p3204 + p3205 The cause of this fault is again reset for abs(r0084 - r1598) < p3204. The fault is only issued after t he delay time in p3206 has expired. Remedy: - check the parameterization (p3204, p3205). - check the interfaces to the excitation equipment (r1626, p1640). - check the excitation equipment. - check the flux control (p1592, p1592, p1597). - check the control for oscillation and take the appr opriate counter measures (e.g. optimize the speed control loop, parameterize a bandstop filter).
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 207914 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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