Technical data
52  •  Feldbus Coupler 750-344 / -345 
 Operating system 
 WAGO-I/O-SYSTEM 750 
 INTERBUS 
3.1.3 Operating system 
The system can be started up after configuring the INTERBUS Master system 
and after electrical installation of the fieldbus station. 
The coupler checks the data bus when power is applied. Following this the I/O 
modules and the present configuration is determined. At the same time, a list 
is generated which is not visible from outside. This includes an input and an 
output area, which is shown on the fieldbus RAM of the protocol chip. 
In the event of an error the coupler switches to "Stop". The I/O LED flashes 
red. After a trouble-free startup, the coupler enters the "Fieldbus start" mode 
and the I/O LED lights up green. 
Fig. 3-7: Operating system - Power on  g012113e 










