查看Modbus的源代码

=== Address ===

Valid slave device addresses are in the range of 0 ... 247 (decimal). 

The individual slave devices are assigned addresses in the range of 1... 247. 

Value 0 is reserved for broadcast messages (no response). 

When the slave sends its response, it places its own address in this address field of the response frame to let the master know which slave is responding.

<br>