Hello guys, need your help! I got similar issue today.

0130:000002 error and the same symptoms as described in this topic.

I tried first to connect directly to PLC. And it worked, connectible. Then I went back to the switch, I tried connected through and disconnected all cables from it. Then I connected PG, and then checked if I could connect to the PLC. It worked.

Then I started to connect back previously disconnected cables, one by one. And finally I found one cable, that make PLC inaccessible. It is mobile HMI panel.

I then disconnected PLC out of the network, and then ping the PLC address - it is down. As I understand, if I had mobile HMI with the same IP as PLC, I would receive call-back from HMI..? 

The context about interaction with HMI day before - it worked well and it was in use with no issues. And no change were made to that HMI ever, no downloads, even no "Go Online". The HMI is connected via Sm@rtClient to the main HMI. The only thing were made - it was disconnected once from the port on the cabinet, and then returned back.

Hope you could suggest something. Many thanks.

------------------------------------------------------------------------------------------
Split from Unable to connect or upload to the PLC through the TIA portal V16.