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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.

Win7 64 display that Windows cannot verify the digital signature of the driver required by this device. Error 052. It may be caused by the current Win7 does not support the SHA256 algorithm. You need to download a patch from Microsoft's official website. https://www.microsoft.com/en-us/download/details.aspx?id=46148 Windows6.1-KB3033929-x64.msu, after intall update, then install the cable driver, will slove the 052 error.

The A2/B2 terminal on the GD350A PG card can accept pulse input as a speed reference. A2- connect to Y0, B2- connect to Y1. Connect A2 + and B2 + to PWR of PG card, and connect PGND to COM0 of PLC, set P21.01=1、2、3 refer to PLC pulse output formate.

The COM of the inverter is connected to the COM of the PLC, the HDO is connected to the X input of the PLC, and the +24V of the PLC is connected to S/S. Note that the PLC X input support high pulse input function refer to PLC manual.

When the Y output of the IVC series is connected to the HDI of the GD series VFD, the 24v power supply of the PLC is required. The PLC Y output connect to HDI(VFD), COM0 (PLC) connect to COM(PLC), and +24V(PLC) connect to COM terminal(VFD). In this connection mode, VFD HDI can read the pulse output of PLC.

The output cable of the low-voltage inverter must be equipped with an output reactor after it exceeds 50 meters. Our standard plus output reactor specifications can support 50-150m according to 1% voltage drop. If it exceeds 150m, need to choose 5% voltage drop output reactor,  which can support 150-500m(need to contact our technicians about the 5% reactor specification). For more than 500m, a sine wave filter is necessary.