Try again from the manual reference position return. Due to an NC or servo system fault in the reference position return, there is the possibility that reference position return could not be executed correctly. Or, when the power was turned on, DRDY went on even though MCON was off.Ĭheck that the servo interface module and servo amp are connected. Refer to diagnostic display 722 or 723 for details.Įven though the n–th axis (axis 1–8) READY signal (MCON) went off, the servo amplifier READY signal (DRDY) is still on. The n–th axis (axis 1–8) servo amplifier READY signal (DRDY) went off.ģ-axis, 4-axis overload signal is on. The n–th axis (axis 1–8) overload signal is on.
Alternatively, the 24-VDC power is short-circuited.Ĭurrent exceeding the preset value has continued longer than normal.Ĭommunication error between amplifier and moduleĪ parameter that requires power–down has been specified.Ī first to third reference position return cannot be executed because the reference position has not yet been established.Ĭontact tri star cnc for repairs Fanuc Servo Amplifier 400 Alarm Codes Alarm Code The regenerative discharge unit has overheatedĢ00-V control power (CX1A) is not supplied. High current flow the the main circuit of that axis has occurredĭC voltage of the power curcuit for that axis is high The temperature of the regenerative resistor has arisen abnormally. The input power supply is abnormal (open phase). The regenerative discharge circuit may be faultyĪn error was detected in the RAM write/read test at power–up. When the magnetic contactor is turned on, the phase sequence of the power supply cannot be determined.Ī parameter has been specified incorrectly.Ībnormally high current in the L–and M–axis motors The input power supply of the main circuit has an imbalance. The frequency of the main circuit input power supply is abnormal. The main circuit power supply has an open phase.Īn error occurred in internal parameter data transfer processing. When the absolute pulse coder is used, the motor has not yet rotated through more than one turn after the first power–up. Reference position setting cannot be executed correctly. The regenerative discharge unit is heated. The offset of the current detection circuit of the main circuit DC link is excessive. Relay contacts for the dynamic brake is faulty.
The input power supply is abnormal (open phase) or the main circuit capacitor was not recharged within the specified time.Ī communication error for the serial pulse coder was detected. Servo motor has overheated (estimated value).Īverage regenerative discharge energy is too high (too frequent acceleration/deceleration) –The regenerative discharge circuit is abnormal. Regenerative discharge energy is too high. The temperature of the heat sink has risen. +5 VDC of the control circuit power supply is abnormally low.ĭC voltage of the main circuit power supply is abnormally low or the circuit breaker is tripped. The battery voltage of the absolute pulse coder is low. Inverter: control power supply undervoltage Internal cooling circuit failure, Overload, Input supply voltage imbalance, IPM failure, or control supply voltage decrease of the power module. The main circuit power module (IPM) has detected an overload, overcurrent, or control supply voltage decrease, overcurrent, or control supply voltage decrease.
Input supply voltage imbalance, IGBT defective. Overcurrent flowed into the input of the main circuit. If blinking continues → Replace the cable.Īmplifier is ready (normal operating state)ĭC voltage of the main circuit power supply is abnormally high. The cable on the Servo Amplifier side connected.) (b) Disconnect the feedback cable (JF*) from the Pulsecoder, and then switch on the power. If blinking continues → Replace the Servo Amplifier. (a) Disconnect the feedback cable (JF*) from the Servo Amplifier, and then switch on the power.
We will provide a fault diagnosis and a dependable 1-year warranty if you require FANUC servo repairs - or a new FANUC servo amplifier module or FANUC DC servo unit. Tri Star CNC Services can provide you with more information on the meaning of your alarms.