To detect whether a PLC has a valid IP address, users must use Windows ping command, according to the next example.

C:\WINDOWS>ping 128.0.0.3
Pinging 128.0.0.3 with 32 bytes of data:
Reply from 128.0.0.3: bytes=32 time<10ms TTL=32
Reply from 128.0.0.3: bytes=32 time<10ms TTL=32
Reply from 128.0.0.3: bytes=32 time<10ms TTL=32
Reply from 128.0.0.3: bytes=32 time<10ms TTL=32

If the ping command receives a reply, this configuration is correct. Otherwise, the ping command reply must look like the one on the next example.

C:\WINDOWS>ping 234.2.3.18
Pinging 234.2.3.18 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.

In this case, return to LM90 and configure an IP address compatible with the network.