Message Examples
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7.2MSTRExample:ModbusPlusNode
ThisexampleshowsaModiconModsoft screen foran MSTRfunction in aModbus
Plusnode. It writesone registerofdatato a destination node on TCP/IP.
HThe MSTRFunction Code specifiesaWrite operation.
HOne registerofdataistobetransferred.
HThe destination registeris40000 (addressed asregister1).
HThe bridge’snode address is1.Notethat the decimalvalue 1025 equals
0401 hexadecimal,addressingaModbusPlusNetworkOption Module
(NOM)in backplane slot04 and a node ataddress 01.
HThe destination indexis28.The bridge will forwardthe message tothe TCP
node whoseIPaddress isinthislocation inthe bridge’sTCPMapping table.
Figure33 MSTRinModbusPlusNode