Industrielle styresystemer - Wiki
PLC2 is 158.38.140.57. It will be a server/slave.
NB! We don't need to connect the Slave to the Master (via IP address), because of we have already connected the Master to the Slave.
Because we've already connected the Master and the Slave (via slave's IP) then we don't need to to specify the IP address again, but we need to choose PCL2 (server/slave)