B&B Electronics GW-7552 - Manual - Manual (Page 41)

GW-7552 PROFIBUS/MODBUS GATEWAY User Manual (Version 1.40, Apr/2012) PAGE: 41
Figure 36 Establish connection with GW-7552
First, users must load the electronic device description file (GSD file) of the GW-
7552 into the DP-Master, and then set the parameters. Finally change your DP-
master from Offline state to Operate state. While DP-Master changes to operate
mode, GW-7552 will initial the modules. Then GW-7552 allocates the memory
space and waits for Set_Prm telegram. The next step is waiting for Check_Cfg
telegram in order. If there is no error occurs, GW-7552 proceeds into data
exchange state. Users can observe the status indicator LED to know the state of
GW-7552. At the meantime, if there is any error occurs, GW-7552 will return to
wait parameterization.
4.8 Data exchange example
In this example a Modbus master device simulated by a PC program sends query