ICP DAS USA GW-7552-B User Manual page 45

Figure 40 Users need to change "Modbus type" to slave
for this example and click "OK" button
Step 4: Set the GW-7552-B modules, as shown in figure 41 and 42.
 Select "System setting" module: "System setting" module always has
to be selected otherwise no communication can be established
between the gateway and the Modbus network.
 Select "Output Relay/Coil" module: In this example an "Output
Relay/Coil--2 Byte" module is selected.
 Select "Input Relay/Coil" module: In this example an "Input
Relay/Coil--2 Byte" module is selected.
Figure 41 Add modules
GW-7552-B / GW-7552-M PROFIBUS/MODBUS GATEWAY User Manual (Version 1.60, May/2017) PAGE: 45