Fieldbus Coupler 750-341 • 41DescriptionWAGO-I/O-SYSTEM 750ETHERNET TCP/IP3 Fieldbus Coupler3.1 Fieldbus Coupler 750-3413.1.1 DescriptionThe fieldbus coupler 750-341 displays the peripheral data of all I/O modulesin the WAGO-I/O-SYSTEM 750 on ETHERNET.When power is applied to the fieldbus coupler, it automatically detects all I/Omodules connected to the coupler and creates a local process image. This canbe a mixture of analog and digital modules. The process image is subdividedinto an input and an output data area.The data of the analog modules is mapped first into the process image. Themodules are mapped in the order of their position after the coupler. Thedigital modules are grouped after the analog modules, in the form of words(16 bits per word). When the number of digital I/O’s exceeds 16 bits, thecoupler automatically starts another word.The user has access to all field bus and I/O data.All sensor input signals are grouped in the coupler (slave) and transferred tothe higher ranking controls (master) via the fieldbus. Process data linking isperformed in the higher ranking controls. The controls put out the resultingdata to the actuators via the bus and the node.The ETHERNET fieldbus coupler is suitable for data rates of 10 Mbit/s and100 MBit/s.To be able to send/receive process data via ETHERNET, the coupler supportsa series of network protocols. For the exchange of process data, theMODBUS TCP (UDP)- protocol and the Ethernet/IP protocol are available.However, the two communication protocols cannot be used together.The protocol HTTP, BootP, DHCP, DNS, SNTP, FTP and SNMP areprovided for the management and diagnosis of the system.The coupler has an internal server for web-based applications. By default, thecoupler’s built-in HTML pages contain information on the configuration andstatus of the fieldbus node, and can be read using a normal web browser. Inaddition, a file system is implemented that allows you to store custom HTMLpages in the coupler using FTP download.
