Determining the IP address

For all subsequent work with the industrial PC and the system, the IP address of the system is required. Using the IP address, remote access via SSH, the Beckhoff Device Manager (web interface) or working with TwinCAT is possible, for example.

Determine IP address with monitor

There are several ways to determine the IP address to access the device via the network. If you have connected a local monitor, you can log in with the user "Administrator" and the password "1".

Enter the command ifconfig in the console to output all available Ethernet interfaces in the system:

Administrator@CX-3D6912:~ $ ifconfig
igb0: flags=8863<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=4a024a9<RXCSUM,VLAN_MTU,JUMBO_MTU,VLAN_HWCSUM,LRO,WOL_MAGIC,RXCSUM_IPV6,NOMAP>
        ether 00:01:05:3d:69:12
        inet6 fe80::78ff:f9f9:ef31:454d%igb0 prefixlen 64 scopeid 0x1
        inet 169.254.228.5 netmask 0xffff0000 broadcast 169.254.255.255
        media: Ethernet autoselect
        status: no carrier
        nd6 options=1<PERFORMNUD>
igb1: flags=8863<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=4a024a9<RXCSUM,VLAN_MTU,JUMBO_MTU,VLAN_HWCSUM,LRO,WOL_MAGIC,RXCSUM_IPV6,NOMAP>
        ether 00:01:05:3d:69:13
        inet6 fe80::d2c1:31fd:a18e:e1c3%igb1 prefixlen 64 scopeid 0x2
        inet 172.17.40.26 netmask 0xfffffc00 broadcast 172.17.43.255
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
        nd6 options=1<PERFORMNUD>
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
        inet 127.0.0.1 netmask 0xff000000
        groups: lo
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
Administrator@CX-3D6912:~ $

By default, the Ethernet interfaces are configured to receive an IP address from a local DHCP server. In this sample, this is the IP address: 172.17.40.26 which was assigned for the interface igb1 via which the industrial PC was connected to the network.

Determine IP address without monitor

Use the Broadcast Search function under TwinCAT if no monitor is connected to determine the IP address of a TwinCAT/BSD target system.

Determining the IP address 1: — Add-Route dialog with a TwinCAT/BSD target system and associated IP address.

If you have multiple controllers, you can identify them by name or operating system. Note that under TwinCAT/BSD only Secure-ADS is enabled by default. A detailed description of how to use the Broadcast Search function and how to search for a TwinCAT/BSD target system can be found at: Searching for target systems.

If you have a direct connection to your laptop without DHCP, the TwinCAT/BSD device assigns itself an auto-IP address from the range 169.254, and the last two bytes are then derived from the last two bytes of the MAC address (169.254.{MAC5}.{MAC6}) printed on the name plate.