S7-200 cpu224cn and computer communication, display communication timeout, check network number, baud rate; communication cable is USB turn 232232 turn 485. Urgent need to solve
If it is USB serial line problems, it is recommended to buy a littleIf there is SIEMENS USB Download line is better, this can be MPI/PPI adaptive, 300200 are used, but bought the original and domestic, domestic stability or worse, and sometimes will not even go up.
You should use the USB, install 232 of the cable, and then download the line is the serial port of the download line,In fact, the setting is very simple, PG/PC, which is PPI serial port, this serial port is your USB conversion cable serial port,General download line will not have much problem, but your USB 232 serial conversion line will be affected by many kinds of cables, USB conversion cable is not stable, you estimate is for this reason, you can try to find a serial computer directly inserted to try, see if it is USB serial port the line of the problem (most likely)
