Micromod MOD: Modcell 2050R MODBUS Communications - Manual (Page 6)

IB-23C650M
INTRODUCTION
allows it to be identified by the master. This permits multiple slaves
(controllers) to reside on a single Modbus network.
The controller can be assigned any address between 1 and 247.
Addresses are set in the RS-485 MENU as part of the setup for
modbus communication. Address 0 is the “broadcast” address. Only
write messages can use it. All controllers process the message, but
there is no response back to the host.
Other types of slaves may reside on a network with the controllers.
Modbus does not support peer-to-peer communications where two
controllers can talk directly with each other.
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