Power supply

(L1, L2, L3)

Turn on control supply (L1C, L2C)

1. Digital tube does not light up
2. Voltage indicator does not light up

✎Rewiring

✎L1C and L2C power lines are led separately from the socket

✎Check whether group P06 is set the servo enable signal (DI function 1: S-ON). If it is, check whether the corresponding DI terminal logic is valid. If it is invalid,please make it valid. Refer to Group P06 DI/DO configuration

✎If group P06 parameters have set the servo enable signal, and the corresponding terminal logic is valid, but the panel still displays "rdy", check whether the DI terminal wiring is correct, please refer to 4 Wiring

1. Confirm whether DI terminal uses forward drive prohibited (DI function 3: POT) or reverse drive prohibited (DI function 4: NOT).
2. Confirm whether DI terminal uses instruction pulse input prohibited (DI function 11: INH)
3. When P01-06=0(position instruction source), PLC or other pulse output device do not output pulse. Please use oscilloscope to check whether there is pulse input or check U0-08 (input instruction pulse frequency). Refer to 4 Wiring
4. When P01-06=1(position instruction source), please check whether the parameters of group P07 are set correctly. If yes, please confirm whether the DI function 20 (internal multi-segment position enable signal) and the corresponding DI terminal logic are set to be valid. Refer to Group P07 multi-segment position

✎Confirm the U0-09 value (input instruction pulse number) is consistent with the actual one sent by the host computer. If not, please check confirm whether the motor is blocked.

✎Confirm whether the device is vibrating. If yes, adjust the gain.

✎Confirm whether the coupling at the motor shaft is locked.

Power supply

(L1, L2, L3)

Turn on control supply (L1C, L2C)

1. Digital tube does not light up
2. Voltage indicator does not light up

✎Rewiring

✎L1C and L2C power lines are led separately from the socket

✎Check whether group P06 is set the servo enable signal (DI function 1: S-ON). If it is, check whether the corresponding DI terminal logic is valid. If it is invalid,please make it valid. Refer to Group P06 DI/DO configuration

✎If group P06 parameters have set the servo enable signal, and the corresponding terminal logic is valid, but the panel still displays "rdy", check whether the DI terminal wiring is correct, please refer to 4 Wiring

✎AI wiring error

When selecting analog input signal, make sure that the connection of analog input terminal is correct. Refer to 4 Wiring.

✎Not input speed instruction or speed instruction abnormal

1. When selecting analog input signal, please confirm the AI parameters of group P05 is set correct, and then check the analog input voltage signal. It could be observed by oscilloscope or read by monitoring U0-21 and U0-22.
2. When the internal speed instruction is given, please confirm P01-02 (internal speed instruction )is 0.
3. When using multi-segment speed function, please confirm the internal speed instruction parameters 0 to 7 of group P01 are right.
4. Please confirm whether the ZERO-speed clamp function is used for the DI terminal. (DI function 5: ZCLAMP)

Power supply

(L1, L2, L3)

Turn on control supply (L1C, L2C)

1. Digital tube does not light up
2. Voltage indicator does not light up

✎Rewiring

✎L1C and L2C power lines are led separately from the socket

✎Check whether group P06 is set the servo enable signal (DI function 1: S-ON). If it is, check whether the corresponding DI terminal logic is valid. If it is invalid,please make it valid. Refer to Group P06 DI/DO configuration

✎If group P06 parameters have set the servo enable signal, and the corresponding terminal logic is valid, but the panel still displays "rdy", check whether the DI terminal wiring is correct, please refer to 4 Wiring

✎AI wiring error

When selecting analog input signal, make sure that the connection of analog input terminal is correct. Refer to 4 Wiring.

✎Not input torque instruction

1. When selecting analog input signal, please confirm the AI parameters of group P05 is set correct, and then check the analog input voltage signal. It could be observed by oscilloscope or read by monitoring U0-21 and U0-22.
2. When the internal speed instruction is given, please confirm P01-08 (torque instruction keyboard set value) is 0.

Setting method

Effective time

Operation setting

immediately Effective

0: No operation

1: For clearable faults, after the cause of fault is removed, and write 1 to the function code, the drive will stop the fault display and enter the Rdy (or RUN) state again.

✎Note: If the servo S-ON is valid, when the fault is removed and cleared, the servo will directly enter the Run state. When performing fault clearing actions, be sure to stop sending control instructions such as pulses to ensure personal safety.

DI port logic is invalid, no reset faults and warnings

DI port logic is valid, reset faults and warnings

Parameter storage error

Exceptions such as the version, total number, range, and validation failure of internal parameter storage.

Possible reasons are:

✎The drive has undergone a software upgrade

✎In the process of parameter storage, an instantaneous power failure occurs

✎Frequent writing of parameters

✎Check whether the program has been updated. If the parameter storage is abnormal due to the updated program, please update the parameters by restoring the factory default parameters and power on again.

✎Re-power on and reset the parameters after restoring the factory default settings;

✎Confirm whether the host computer writes parameters frequently, and modify the corresponding parameter writing method;

ADC conversion undone

Internal software Fault

Internal software Fault

Internal software Fault

Internal software Fault

Internal software Fault

Motor model error

No Z pulse signal appears when the motor rotates more than one turn.

The possible reasons are:

✎Wrong motor model

✎The motor encoder is disturbed or damaged;

✎Check whether the motor model matches the drive model.

✎Replace the motor and power on again.

Incremental encoder AB count is not equal to encoder line number*4.

The possible reasons are:

✎The motor model is wrong;

✎Hand interference or damage to the motor encoder;

✎Check whether the motor model matches the drive model.

✎Replace the motor model that matches the drive.

✎Check whether the motor model matches the drive model

✎Replace the motor model that matches the drive.

✎Replace encoder line

Exceeds motor maximum speed

Exceeding the maximum speed threshold of function code P1-10. Possible reasons are:

✎Wrong U/V/W phase sequence of motor power line

✎Wrong t motor model

✎Wrong transfer wiring of motor power line

✎Wrong wiring of motor encoder

✎Please check whether the motor power line is correctly wired;

✎Confirm whether the motor model is correct;

✎Use the correct power line and encoder line transfer wiring;

The drive detects that the power device has overcurrent, the possible situations are:

✎The motor power lines U, V, W are short-circuited to the ground

✎Short circuit between the motor power lines U, V, W

✎The motor power lines U, V, W have poor contact

✎The internal damage of motor

✎The encoder cable is aging and loose

✎Excessive fluctuation of control power supply.

✎Please check whether the wiring of the motor power line is correct

✎Whether the wiring of the motor power line is loose or short-circuited

✎Replace the motor power line transfer line

✎Replace the motor

✎Replace the encoder transfer line

✎If the above methods still cannot eliminate the fault, please contact the manufacturer.

Braking resistor turns on abnormally

The braking resistor bleeder is turned on, but no feedback signal is detected. The possible reasons are:

✎The braking resistor failed to open;

✎Braking resistor feedback detection faults;

The drive detects that the bus voltage is too high. The possible reasons are:

✎Check whether the main power input voltage is normal.

220V drive power supply voltage range: -10% to +10% (198V to 242V)

380V drive power supply voltage range: -10% to +10% (342V to 418V)

✎The resistance of the braking resistor is too large, causing the braking energy can not be absorbed in time.

✎The load inertia is large and the motor accelerates and decelerates too fast, and the maximum braking energy exceeds the absorbable value.

✎The bus voltage detection deviation is too large.

✎Check whether the mains input voltage is too high.

✎Check whether the resistance of the braking resistor is reasonable.

✎Extend the acceleration and deceleration time and choose a braking resistor with a lower resistance.

✎Check whether the wiring of the motor encoder wire is loose. If it is, please tighten it.

✎Replace the encoder cable, and then power on again.

✎Check whether the wiring of motor power line is loose, if it is loose, please tighten it.

✎Replace motor power line transfer cable, and then power on again.

The bus voltage of the drive is lower than the limit value:

✎220V drive: normal bus voltage 310V, undervoltage threshold 200V

✎380V drive: normal bus voltage 540V, undervoltage threshold 400V

The possible causes of main power supply undervoltage are:

✎The main power supply is not connected.

✎The input voltage is low, or the voltage drops.

✎The internal main power relay is damaged.

✎Check whether the drive input voltage is low. If it is, please increase the voltage or wait for the power supply to be normal, and then power on again to see if the fault is cleared.

✎Check the input power voltage of drive to see if the voltage drops due to the change of the power load.

Braking resistor is not connected

✎When using the internal braking resistor, the shorting cap between C and D is disconnected.

✎When using an external braking resistor, the resistor is not connected.

✎The braking resistor status detection circuit is abnormal.

✎If using an internal braking resistor, please confirm whether the short-circuit jumper contact between C/D is in normal.

✎If you use an external braking resistor, please make sure that the external braking resistor is reliably connected.

✎If you use an external braking resistor, please confirm whether the resistance of the braking resistor is reasonable.

✎If the above methods still cannot eliminate the fault, please contact the manufacturer.

Braking resistor resistance is too large

Power module is over temperature

The temperature of the power module exceeds the normal value. The possible reasons are:

✎The cooling fan is faulty, resulting in abnormal

✎The ambient temperature is too high.

✎The installation of the drive is unreasonable, and the interval is too small, resulting in abnormal heat dissipation.

✎Confirm whether the cooling fan is operating normally. If it is not normal, please replace the drive.

✎Improve the ambient temperature.

✎Install the servo drive according to the installation standard.

Motor overload protection

The drive detects that the motor is running overloaded. The possible reasons are:

✎The load is too large, and the motor works in a state that exceeds the rated torque for a long time.

✎The load inertia is relatively large and the acceleration and deceleration are frequently performed at the same time.

✎The speed loop and position loop gain parameter settings are unreasonable.

✎The motor is blocked.

✎Servo drive faults

✎Check whether the load of the motor is too large. If the load is too large, replace the motor and drive with a larger power.

✎Increase the acceleration and deceleration time.

✎Use the host computer software to observe the actual torque, and observe whether there is obvious speed overshoot. Adjust the appropriate loop gain parameters;

✎Check the mechanical connection and troubleshoot.

✎Replace servo drive.

In the electronic gear ratio setting, the numerator/denominator ratio is less than the lower limit or greater than the upper limit;

The electronic gear ratio setting range is as follows:

2500 line incremental encoder, the electronic gear ratio range is 0.01 to 100.

For a 17-bit encoder, the electronic gear ratio range is 0.001 to 500.

For a 23-bit encoder, the electronic gear ratio range is 0.001 to 32000.

Check whether the electronic gear numerator and denominator setting values of function codes P00-17 to P00-20 meets the conditions:

the numerator/denominator is within the range, and then power on again after modification.

Position deviation is too large

The deviation of the current position pulse exceeds the setting value of P00-25 position deviation limit. The possible reasons for are:

✎The motor U/V/W wire is not connected or disconnected.

✎The phase sequence of the U/V/W wires of the motor is connected incorrectly.

✎The motor load is too large, or the motor is blocked.

✎The drive gain setting is unreasonable.

Position instruction equivalent speed changes too fast.

✎Check whether the wiring of the motor power line U/V/W is normal.

✎Check the load condition of the motor. If the load is too large, please replace the drive and motor with higher power; if it is blocked, please check the machine.

✎Set the gain parameters according to the method in the "Adjustment" chapter in the user manual.

✎When the position instruction equivalent speed changes too much, the ramp time can be appropriately increased to reduce the speed change rate.

Torque saturation abnormal

The torque reaches the maximum torque limit and exceeds the setting time of P01-19 function code. The possible reasons are:

✎The load is too large, and the drive outputs with maximum torque, but it still cannot reach the target speed within the predetermined time.

✎Whether the maximum forward torque limit and the maximum reverse torque limit are set too small.

✎The motor is blocked.

✎P01-19 torque limit time is set too short.

✎The motor U/V/W line phase sequence is wrong.

✎Confirm whether the load is too large.

✎According to the actual application, modify the forward torque limit and the maximum reverse torque limit to appropriate values.

✎Check whether the machine is blocked.

✎Confirm whether the setting of the function code P01-19 is reasonable.

✎Confirm whether the motor U/V/W line phase sequence is correct.

Main circuit electricity is lack of phase

✎Whether the drive of three-phase specification is running under single-phase power supply.

✎Check whether the main circuit input L1, L2, L3 wiring is good.

✎The three-phase power supply is unbalanced or the three-phase voltage is too low.

✎Check whether it is a man-made emergency shutdown protection, if so, wait for other system faults to be removed and then power on again.

✎If it is triggered by mistake, please check whether the wiring and function configuration of the DI terminal are normal.

✎During power failure, the multi-turn absolute value motor is not connected to the battery.

✎The encoder battery voltage is too low, less than 3V.

✎When the braking resistor is selected as the internal braking resistor, it means over temperature.

✎When the braking resistor is externally connected, it means overload.

✎Please confirm whether the load inertia is too large.

✎Please confirm whether it starts and stops frequently, and whether the speed is too high.

✎Please check whether the actual resistance value is greater than the set value.

Input pulse

frequency is too high

Main circuit momentary

power off

low encoder battery voltage

Warning of

Encoder read and write

check abnormal and frequency is too high