S7 Connection aborted!!

[FAGARCIA]

Hello people.
Iam getting the following error.

I clikc ok and try again and it works for a short period of time.
I'm using PC adapter USB type with this configuration:

the plc has this configuration:

Any ideas of why I get disconnected so often??

thanks

 

[JesperMP]

Ideas:
Extreme noise.
No ground.
The USB adapter may be defective.
The MPI port may be defective.
The cable may be defective.
There may be a conflict on the PC with the USB adapter and some other device.
If the PC is supplied from another source than the PLC: Too big voltage difference on the "ground" of the two systems.

Things you can try:
Switch to DP and go online via the DP port.
Change the S7 CPU.
Change the USB adapter.
Change the PC.

 

[s7xp.com]

If nothing more is connected to the MPI port, set the "only master on the bus" flag of the PG/PC interface. This may help also.