A: Encoder faults include: ENC1O，ENC1D，ENC1Z，ENC1U
ENC1O: Encoder disconnection fault, wrong encoder type and pulse number settings, or incorrect wiring. Solution: Set the parameters according to the encoder nameplate, and connect the wires correctly in combination with the GD300L encoder line sequence;
ENC1D: Encoder AB reverse fault, GD300L detects the AB phase signal is opposite, solution: change the AB phase direction setting parameter P20.02, or change the AB phase encoder wiring;
ENC1Z: Encoder Z pulse disconnection fault, GD300L does not detect Z pulse signal, solution: check Z pulse wiring;
ENC1U: Encoder U-phase disconnection fault, GD300L does not detect UVW signal, solution: check UVW signal line, remove the interference source;