AmirReza Farzaneh

Thanks a lot for your reply
yes i checked the manual operation and it succeed
I'll check the connection again
 

Two devices 6221 and 2182a are connected, I want to perform Delta measurement by using labview , I use Ethernet port for monitoring, when I run Labview, it can recognize 6221, but it gives an error that it could not recognize 2182a and says check that two devices connected correctly , But well, I connected these two devices together and I am absolutely sure that they are connected , I checked everything again but could not find the problem