rejoe.koshy
Member
Hey guys,
I have MLX LOGIX1400 running fine except that it faults sometimes on math over flow. I examined the program and spotted a counter and timer whose .PRE value was set to 32767 and subsequently deactivated the rung using a AFI bit but the fault seems to reappear .
I pretty sure that the program does not have any other issues..Just one thing .... some of the integer and binary data files read 32767 depending on the state of the individual bits...For example the data file B3:4 file has a decimal value of 32768 because the B3:4/15 is 1 and the rest is 0
Will this cause math overflow and fault the PLC ??...Moreover I wan to move the fault code when fault happens to a data file to compile a fault log in SCADA ..how can I achieve that??
I have MLX LOGIX1400 running fine except that it faults sometimes on math over flow. I examined the program and spotted a counter and timer whose .PRE value was set to 32767 and subsequently deactivated the rung using a AFI bit but the fault seems to reappear .
I pretty sure that the program does not have any other issues..Just one thing .... some of the integer and binary data files read 32767 depending on the state of the individual bits...For example the data file B3:4 file has a decimal value of 32768 because the B3:4/15 is 1 and the rest is 0
Will this cause math overflow and fault the PLC ??...Moreover I wan to move the fault code when fault happens to a data file to compile a fault log in SCADA ..how can I achieve that??