Code 207906: <location>Armature short-circui t / internal voltage protection: Parameterization error
Problembeschreibung & Sicherheitswarnung
Die Siemens SINUMERIK 840D CNC hat einen kritischen <location>Armature short-circui t / internal voltage protection: Parameterization error-Alarm ausgelöst. Sofortige Aufmerksamkeit durch einen qualifizierten Bediener oder Wartungstechniker ist erforderlich, um Folgeschäden an der Ausrüstung oder verdorbene Teile während des Fertigungszyklus zu vermeiden. Stellen Sie immer sicher, dass standardmäßige Sicherheits- und LOTO-Verfahren befolgt werden, bevor Sie auf Schaltschränke zugreifen.
Offizielle Schritte zur Fehlerbehebung
Message value: Fault cause: %1, motor data set: %2 Drive object: SERVO, VECTOR Reaction: OFF2 Acknowledge: IMMEDIATELY Cause: The armature short-circuit is incorrectly parameterized. Fault value (r0949, interpret decimal): Low word: Motor data set number High word: Cause: 1: A permanent-magnet synchronous motor has not been selected. 101: External armature short-circui t: Output (r1239.0) not connected up. 102: External armature short-circuit with c ontactor feedback signal: No feedback signal connected (BI:p1235). 103: External armature short-circuit withou t contactor feedback signal: Delay time when opening (p1237) is 0. 201: Internal voltage protection: The maximum output current of the Motor Module (r0289) is less than 1.8 * motor short-circuit current (r0331). 202: Internal voltage protection: A Motor Module in booksize format is not being used. 203: Internal voltage protection: The motor short-ci rcuit current (p0320) is greater than the maximum motor current (p0323). 204: Internal voltage protection: The activation (p1231 = 4) is not given for all motor data sets with synchronous motors (p0300 = 2xx, 4xx). SINAMICS-Alarms Remedy: Re cause 1: - an armature short-circuit / voltage protection is only permissible for permanent-magnetic synchronous motors. The highest position of the motor type in p0300 must either be 2 or 4. Re cause 101: - the contactor for the external armature short-ci rcuit configuration should be controlled using output signal r1239.0. The signal can, e.g. be connected to an output terminal BI: p0738. Before this fault can be acknowledged, p1231 must be set again. Re cause 102: - if the external armature short-circuit with cont actor feedback signal (p1231 = 1) is selected, this feedback signal must be connected to an input termin al (e.g. r722.x) and then connected to BI: p1235. - alternatively, the external armature short-circ uit without contactor feedback signal (p1231 = 2) can be selected. Re cause 103: - if the external armature short-circuit without contactor feedback signal (p1231 = 2) is selected, then a delay time must be parameterized in p1237. This time must always be greater than the actual contactor opening time, as otherwise the Motor Module would be short-circuited! Re cause 201: - a Motor Module with a higher maximum current or a motor with a lower short-circuit current must be used. The maximum Motor Module current must be higher than 1.8 * short-circuit current of the motor. Re cause 202: - for internal voltage protection, us e a Motor Module in booksize format. Re cause 203: - for internal voltage protection, onl y use short-circuit proof motors. Re cause 204: - The internal voltage protection must either be activated for all motor data sets with synchronous motors (p0300 = 2xx, 4xx) (p1231 = 3) or it must be de-activated for all motor data sets (p1231 not equal to 3). This therefore ensures that the protec tion cannot be accidentally wi thdrawn as a result of a data set changeover. The fault can only be acknowledged if this c ondition is fulfilled.
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.
Über Siemens SINUMERIK 840D CNC Alarme
Industriesteuerungen von Siemens verfügen über umfangreiche Diagnosesysteme zum Schutz der internen Schaltkreise und mechanischen Verbindungen. Wenn eine SINUMERIK 840D CNC einen Fehlercode wie 207906 ausgibt, deutet dies typischerweise auf eine Diskrepanz zwischen befohlenen Werten und tatsächlichem Sensor-Feedback hin.
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