Code 207963: <location>Drive: Friction characteristic record interrupted
Issue Description & Safety Warning
The Siemens SINUMERIK 840D CNC has triggered a critical <location>Drive: Friction characteristic record interrupted 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: Parameter: %1 Drive object: SERVO, VECTOR Reaction: OFF1 Acknowledge: IMMEDIATELY Cause: The conditions to record the fricti on characteristic are not fulfilled. Fault value (r0949, interpret decimal): 0046: Missing enable signals (r0046). 1082: The highest speed value to be approached (p3829) is greater than the maximum speed (p1082). 1084: The highest speed value to be approached ( p3829) is greater than the maximum speed (r1084, p1083, p1085). 1087: The highest speed value to be approached ( p3829) is greater than the maximum speed (r1087, p1086, p1088). 1110: Friction characteristic record, negative di rection selected (p3845) and negative direction inhibited (p1110). SINAMICS-Alarms Diagnostics Manual (DAsl), 03/2009 1111: Friction characteristic reco rd, positive direction selected (p3845) and positive direction inhibited (p1111). 1198: Friction characteri stic record selected (p3845 > 0) and negat ive (p1110) and positive directions (p1111) inhibited (r1198). 1300: The control mode (p1300) has not been set to closed-loop speed control. 1755: For encoderless closed-loop control (p1300 = 20), the lowest speed value to be approached (p3820) is less than or equal to the changeover speed, open-loop controlled operation (p1755). 1910: Motor data identification activated. 1960: Speed controller optimization activated. 3820... 3829: Speed (p382x) cannot be approached. 3840: Friction characteristic incorrect. 3845: Friction characteri stic record de-selected. Remedy: Fulfill the conditions to record the friction characteristic. Re fault value = 0046: Establish miss ing enable signals. Re fault value = 0840: Select OFF1 (p0840) only after the friction characteristic record has been completed. Re fault value = 1082, 1084, 1087: Select the highest speed value to be approached (p3829) less than or equal to the maximum speed (p1082, r1084, r1087). Re-calculate the speed points along the friction characteristic (p0340 = 5). Re fault value = 1110: Select the friction characteristic record, positive direction (p3845). Re fault value = 1111: Select the friction characteristic record, negative direction (p3845). Re fault value = 1198: Enable the permitted direction (p1110, p1111, r1198). Re fault value = 1300: Set the control mode (p1300) on the closed-loop speed control (p1300 = 20, 21). Re fault value = 1755: For encoderless closed-loop speed c ontrol (p1300 = 20) select the lowest speed value to be approached (p3820) greater than the changeover spee d of open-loop controlled operation (p1755). Re-calculate the speed points along the friction characteristic (p0340 = 5). Re fault value = 1910: Exit the motor data identification routine (p1910). Re fault value = 1960: Exist the speed controller opt imization routine (p1960). Re fault value 3820... 3829: - check the load at speed p382x. - check the speed signal (r0063) for oscillation at speed p382x. If required, c heck the speed controller settings. Re fault value = 3840: Make the friction characteristic er ror-free (p3820 - p3829, p3830 - p3839, p3840). Re fault value = 3845: Activate the friction charac teristic record (p3845).
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 207963 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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