I seem to be getting a lot of checksum errors when I cycle the power on my plc. If I write the program and transfer it, it works fine. However, when I cycle the power on the plc, it comes back with a checksum error.
It seems to be correlated with using 'AND' in my 'IF' statements. i.e.
IF (N < 0) AND (R > 2) STEPMOVE 1,5,10:ENDIF
Has anybody else been getting these problems?