Message Examples

7.2MSTR Example: Modbus Plus Node

This example shows a Modicon Modsoft screen for an MSTR function in a Modbus Plus node. It writes one register of data to a destination node on TCP/IP.

HThe MSTR Function Code specifies a Write operation. H One register of data is to be transferred.

H The destination register is 40000 (addressed as register 1).

HThe bridge’s node address is 1. Note that the decimal value 1025 equals 0401 hexadecimal, addressing a Modbus Plus Network Option Module (NOM) in backplane slot 04 and a node at address 01.

HThe destination index is 28. The bridge will forward the message to the TCP node whose IP address is in this location in the bridge’s TCP Mapping table.

Figure 33 MSTR in Modbus Plus Node

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Schneider Electric 174 CEV manual Mstr Example Modbus Plus Node, Mstr in Modbus Plus Node

174 CEV specifications

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