1. What is the purpose of using a PLC in the machine?
2. What does the read D230=1 error message mean?
3. What is the M142-CCD reads the CCD photo request signal error code?
4. What steps can be taken
It appears that M142-CCD and D230 are related to a photo request signal under a PLC. The error message suggests that the PLC is not able to read the signal properly and times out. Without more specific