YASKAWA AC Drive G7 Series (Model CIMR-G7U)

C1-02 Deceleration time 1 Deceleration time from maximum frequency to 0 (seconds) 10.0s

E1-01 Input Voltage Setting Driver Rated Input Voltage (200V for 200V level, 400V for 480V level) 200V

E2-01 motor rated current The rated current on the motor nameplate (ampere) is 1.90A

L1-01 motor overload protection selection 1=standard fan cooling motor protection (default), 3=vector motor protection 1

2. Key Explanation of Functional Parameters

Self tuning parameters (T1 series): Set T1-01 to 0=rotational self-tuning (motor no-load operation calibration), 1=static self-tuning (motor does not rotate, only partial parameters are measured), and input the motor nameplate parameters (power, voltage, frequency, number of poles).

PID control parameters (b5 series): b5-01 set 1=PID enable, b5-02=proportional gain (default 1.00), b5-03=integration time (default 1.0s), used for closed-loop control of pressure, flow, etc.

Torque compensation parameter (C4 series): C4-01=torque compensation gain (default 1.00), increases when low load vibration occurs, and increases when low-speed torque is insufficient.

Trial operation and maintenance

1. Trial operation process

(1) No load trial operation

After confirming that the wiring is correct, turn on the power and check that the digital operator displays normally (without any fault codes);

Switch to LOCAL mode, set the low frequency (such as 5Hz), press the RUN button, and confirm that the motor rotates correctly (if reversed, swap any two output terminals U/T1, V/T2);

Gradually increase the frequency to the rated value, monitor the output current (there should be no abnormal fluctuations), and press the STOP button to confirm that the deceleration is normal.

(2) Load trial operation

Connect the motor and load after power failure to ensure that the mechanical system is unobstructed;

Starting from low frequency (10% rated frequency), check the stability of the load operation and ensure there are no abnormal noises or vibrations;

Gradually increase to the operating frequency and confirm that the output current is ≤ the rated current of the motor. If overcurrent/overload occurs, adjust the acceleration/deceleration time or check the load.

2. Maintenance and upkeep

(1) Daily inspection

Check the drive for any abnormal noise or odor, and ensure that the cooling fan is running normally;

Confirm that the digital operator displays normally without any fault/alarm codes;

Check that the terminal screws are not loose and the cables are not aged or damaged.

(2) Regular maintenance (every 6 months to 1 year)

Clean the dust inside the drive (using compressed air, pressure ≤ 0.3MPa);

Check the wear of the cooling fan bearings (replace if there is any abnormal noise);

Measure the capacitance of the main circuit (if it is lower than 80% of the initial value, it needs to be replaced).

Common fault handling

Fault code, fault cause, and solution measures

OC output short circuit, motor overload, short acceleration time. Check whether the output cable is short circuited, reduce the load, and extend the acceleration time (C1-01)

The UV input voltage is too low, the capacitor discharge is incomplete, and the power supply fluctuation confirms that the input voltage meets the requirements. Wait for the capacitor to fully discharge (≥ 5 minutes) and install a voltage regulator device

OL1 motor overload (exceeding thermal protection time), reduce load, check motor heat dissipation, adjust L1-02 (overload protection time)

PGO PG (encoder) disconnection, wiring error check PG cable connection, confirm PG model matches parameter F1-01 (PG pulse number)