There are several ways to interface SIXNET controllers, RTUs and I/O to Wonderware's Intouch or Incontrol HMI software.

• Modbus OPC/DDE Server: SIXNET offers a free OPC/DDE to Modbus Server. This server use the Modbus protocol to communicate over Ethernet or serial connections to SIXNET stations. It then makes the I/O available to any client software that supports OPC (v1.0), DDE, FastDDE, or AdvancedDDE.
  
• SIXNET OPC/DDE Server: SIXNET also offers an OPC/DDE to SIXNET Server. This server use the advanced SIXNET protocol to communicate over Ethernet or serial connections to SIXNET stations. It then makes the I/O available to any client software that supports OPC (v2.0), DDE, FastDDE, or AdvancedDDE. A free license for up to 32 I/O and/or 2 stations is provided for the SIXNET driver. For more I/O or stations or to run other drivers, additional licenses can be purchased directly from www.kepware.com.

• Modbus Direct Drivers: You can also use Wonderware's standard Modbus (Ethernet or serial) servers to communicate directly to SIXNET stations. Wonderware's Intouch or Incontrol then uses their Suitelink protocol to communicate to the server. (Note: With serial connections, you can't communicate to the SIXNET stations with SIXNET software utilities at the same time they are being polled via Modbus ASCII or Modbus RTU.)