Beckhoff EL6601 Documentation page 135

• Computer C: Windows XP Embedded
Fig. 169: Setting up an EtherCAT-Master-PC as Network Bridge
To do this, the Master PC "TwinCAT Master" (B) must be setup as a TCP/IP bridge in order to route TCP/IP
telegrams through to the subordinate CX1020 (C) or to relay them in the opposite direction. The partner
device is a PC (A).
Distinction must be made between two cases here: static addresses [} 135] and DHCP address assignment
[} 138] (network).
The following explanations assume the preceding samples as basic knowledge.
Computers (A), (B) and (C) have a static IP address
Fig. 170: Configuration of the network PC
• Configure the three PCs as shown in the diagram. The dialogs for the properties of the Internet
protocol were explained in the preceding samples.
• Using the registry editor (Start --> Run --> regedit), set the entry "IPEnableRouter" in the "bridge" PC B
to the value 1. The entry is usually located under HKEY_LOCAL_MACHINE\SYSTEM
\ControlSet001\Services\TCPIP\Parameters or also under HKEY_LOCAL_MACHINE\SYSTEM
\CurrentControlSet\Services\TCPIP\Parameters.
• Following a restart, routing for IP telegrams is active for this PC. The connection can then be checked
by means of a ping (Start --> Run --> cmd --> ping 192.168.1.1) to the EtherCAT port 192.168.1.1.
• If the EtherCAT master is in a normal and error-free state (TwinCAT in "Config"/"FreeRun" or "Run"
mode), the connected Ethernet device with the IP address 192.168.1.10 can be reached via the
EL6601.
EL6601, EL6614 Version: 4.2
Application samples
135