Fieldbus Coupler 750-341 • 45Operating systemWAGO-I/O-SYSTEM 750ETHERNET TCP/IPWarningThe communication cable 750-920 must not be connected or disconnectedwhile the coupler/controller is powered on!3.1.2.6 Hardware address (MAC-ID)Each WAGO ETHERNET fieldbus coupler is provided from the factory witha unique and internationally unambiguous physical ETHERNET address, alsoreferred to as MAC-ID (Media Access Control Identity). This address is to befound on the rear of the coupler and on an adhesive tear-off label on the sideof the coupler. The address has a fixed length of 6 Bytes (48 Bit) and containsthe address type, the manufacturer’s ID, and the serial number.3.1.3 Operating systemFollowing is the configuration of the master activation and the electricalinstallation of the fieldbus station to start up the system.After switching on the supply voltage, the coupler determines the I/O modulesand the present configuration.In the event of a fault, the coupler changes to the "Stop" condition. The "I/O"LED flashes red. After a fault free start up, the coupler changes to the"Fieldbus start" status and the "I/O" LED lights up green.Stopred “I/O” LED indicatesblink codeSwitching on thesupply voltageTest o.k.? NoYesFieldbus coupler isin operating mode“I/O” LED is shining greenInitialization,Determination of the I/O modulesand the configuration,“I/O” LED is blinking redFig. 3.1-3: Operating system 750-341 g012920e
