What is the function of the M146-PLC command in the KM-ASSYM5-10 machine?

What is the purpose of the timed-out waiting for the CCD response?

What actions should be taken to resolve the error id of 77 in
The solution for the M146-PLC timed out waiting for the CCD to reply with the result of taking the material and taking pictures could be to check the communication settings between the PLC and CCD and ensure that they are