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GD350 can support Closed-loop vectorcontrol, need to use optional PG card. More details please see attached manual.

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It is mainly used to prevent silk folding. When the winding diameter is at a specific value, the trajectory of the first repeated action will achieve the effect of coincidence. Too many yarns overlap to form silk folding, which brings hidden dangers to the unwinding of the next process. Therefore, it is necessary to add swing frequency, which is equivalent to adding appropriate disturbance in the regular operation process.

Tension has a great impact on spinning forming, and different sizes of spindles have different requirements for tension. Therefore, different speeds should be set according to different processes and spinning stages to accurately meet the needs of tension.

Pay attention to the anti reversal at the moment of starting the permanent magnet synchronous motor, and pay attention to the demagnetization of the synchronous motor caused by high ambient temperature.

The high temperature and humidity at the textile site have blocked the cooling air duct of the VFD and damaged the fan. The oil stain and corrosivity at the chemical fiber textile site are easy to produce friction static electricity at the chemical fiber textile site. Pay attention to moisture and corrosion prevention at the printing and dyeing site.

Fiirst, please check the closed-loop setting parameters are ok, according to the guide of operation manual. Then do below steps:

1. Please check P20.05=0x33 or not;
2. P20.11, do auto-tuning;
3. Check that the connection between encoder and motor is normal or fixed;
4. Try to fix the motor to test, and observe the output current;
5. Please set the speed to 30 or 40Hz to see the performance.

Sto fault is an adjustment fault. First, check whether the motor is blocked. Another big reason is that the motor parameters of the P02 synchronous motor are inaccurate. The parameters can be reset. Set the motor parameters according to the motor nameplate. Set P00.03, P00.04 and proceed. Spin self-learning. Extend P13.11 detection time. In addition, set SVC1 P00.00=1 is a better way.

Generally, the leakage protection switch that protects the human body from direct or indirect contact with electricity has a protection current of 30mA. When the VFD works, leakage current will be generated. Because theVFD output is PWM (Pulse Modulation Width), there is a capacitance effect of a long cable between the motor cable and the ground. When using a shielded cable, the capacitance effect is more obvious. When the VFD is working, the capacitor is charging and discharging, and current flows into the ground through the capacitor, and then flows back to theVFD from the ground wire on the incoming side to form a current loop. Also due to the harmonic components generated by the VFD itself, the high-frequency harmonic currents that appear will cause the residual current protection device to malfunction and cause frequent tripping. Therefore, for the VFD use occasions, the front-end leakage switch is of little significance. Correctly grounding the inverter, motor and equipment is the best way.

OV1 is an acceleration over-voltage fault. First confirm whether the voltage of the input power supply is too high. If the input power supply is normal, disconnect the load and whether the no-load operation is normal. If the no-load status still reports OV1 fault, according to the customer’s on-site experience, the possible reason is insulation problem. Check the insulation of the motor cable and the connection between the motor terminal and the cable.