When using the sample ladder I get an M0/M1 file reference error in my SLC processor if the MVI46 or 3150 is not in Slot 1.

The M0 and M1 files are slot referenced. The second digit in the address represents the slot number.

• If the MVI46 or 3150 module is in slot 1 (next to the processor), then the file reference is M0:1.XXXX and M1:1.XXXX
• If the module is in slot 5, then the file reference would be MO:G>5.xxxx and m1:5.xxxx

The same slot reference applies to input and output files (i and o references)