Overcurrent
Omron · NJ/NX-series Machine Automation Controller
¿Qué significa 04AC0000 hex ?
The current flowing through the converter exceeded the specified value. This fault indicates an excessive current draw, often caused by motor issues, wiring faults, or drive malfunction, posing a risk of component damage.
Causas comunes
- A short-circuit, line-to-ground fault, contact failure, or insulation failure occurred on the U, V, or W motor line.
- The Servo Drive failed.
- The relay for the dynamic brake has been welded due to frequent Servo ON/OFF operations.
- Motor windings are burned out.
- The Servomotor is not suitable for the Servo Drive.
- The command input timing is the same as or earlier than the Servo ON timing.
Pasos de reparación & Lista de verificación
Haga clic en los pasos para seguir su progreso.
- 1
Inspect all power wiring (input and output) to the drive and motor for loose connections, damage, or signs of overheating, paying close attention to the motor cable.
- 2
Verify the mechanical load on the motor is not excessive or binding, ensuring the motor shaft can rotate freely without obstruction.
- 3
Measure motor winding resistance phase-to-phase and insulation resistance to ground (using a megohmmeter) to detect potential motor winding shorts or insulation degradation.
- 4
Check drive parameters for correct motor nameplate data, current limits, and acceleration/deceleration times against the machine's specified configuration.