What is the purpose of the discharging clamp jaw in the Front section PLC1-M7051?

What is the error code of the sensor -X63 in the KM-ASSYH2-05 machine code?

What is the meaning of the "
The solution for the error described as Front section PLC1-M7051-the discharging clamp jaw has dropped abnormally, please check the sensor-X63 is to inspect the sensor-X63 for