There are a lot of reason make to plc causes, hardware and software errors make to crashes. 1, hardware (1) I/O channeling, PLC automatically detect I/O errors, enter STOP mode. (2) I/O damaged,Program can not execute the command. (3) PLC connection module And the address assignment module failed.  (4) power Interferenceor failure. (5) address assignment PLC connection module and a … Continue reading PLC crash reason