I am trying to online edit a program in a MELSEC QCPU, using GX Works2, but I keep getting this error "A file which does not exist in the PLC was specified" <ES:010a4022>
Few weeks ago I had just online edited the same program in the same PLC with the same steps with no problem. There had been no changes to the PLC after that. Just all a sudden when I try to edit yesterday I get this error. Not an expert in Mitsubishi, just started learning the basics.
Connection to PLC is by USB cable.
Steps I followed to connect to PLC:
-Online > Read from PLC
-Select PLC Series: QCPU (Q mode)
-Select PLC side I/F Serial Setting: Serial USB
-Select all target program to Read, then Execute
I am editing the file that I had just read from PLC
Steps I followed to online edit:
-Online > Monitor > Monitor (Write mode)
-Execute the function below when mode is changed: Checked all
-Edit the program (basically just deleted one -||- contact and drew back the line)
-Compile > Online Program Change
Then Bam! error get! "A file which does not exist in the PLC was specified" <ES:010a4022>
I had tried Verify with PLC, but all results match.
Is there something I am missing? Help much appreciated!
