What is the function of the discharging operation on the front buffer conveyor belt in the solution with the error described?

How does the Rear section PLC2-M7033-error related to the discharging operation of the front buffer conveyor belt?

What is the
The solution for the error "Rear section PLC2-M7033-the discharging operation of the front buffer conveyor belt has timed out, please check the sensor X50" is to check the sensor X