AVIA

it is v8.90U now i have restarted the plc, set the com port to default and it shows communication healthy. Thanks a lot for your support. Now I am stuck with read and write data from RS 232 port to a third party RFID reader. If you have any sample program kindly send the same. AVIA

Yes as you said the bit / parity is 7E1 Yes there is a 232-BD card installed on the PLC.

Yes it was 115200 earlier but now on both com 1 and GX developer its 9600. I dont know exact name of cable. It is red coloured cable and SC 09 is mentioned on the same The cable is a RS232 9 pin to a RS422 DIN8 pin correct - Correct

There is no Usb cable used for interface also the cable used between is a standard Mitsubishi cable 422 to serial. This is connected between PLC and PC over COM 1 at 9.6 kbps

Thankyou for your reply. Now I have also tested it without usb to serial convertor by directly connecting it to PC serial port but the error persists. Please help.....

Cannot connect to plc even after all parameters of transfer setup and com port are matching. I am using serial port. Attached error window

Hi, Could anybody help out with a sample program for FX3U - 16M and RS232 BD The requirement is to read and write data from and to this PLC using Serial port over RS 232 connection. Regards, AVIA