In Modbus RTU, if master sends broadcast message to slaves, will slaves devices respond to the master with information?
In our current setup, modbus slave device is connected to PC application via USB. PC application detects the slave device and assigns it a modbus address.
In our new setup, there is a gateway board between PC application and slave devices. PC application will detect gateway board because it is directly connected to PC application via USB. But it won't detect slave devices because they are not directly connected the PC application.
Somehow PC application has to be informed as to which slave devices are on the modbus network so it can assign addresses to slave devices.
I'm thinking about using broadcast adress 0 to find out the identification of slave devices. Master Gateway will send broadcast messages to slaves. Will they respond to gateway?