Moxa Technologies 6110 user manual Typical Modbus Applications

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Typical Modbus Applications

In this chapter, we introduce three typical Modbus applications.

Serial master device talks to serial slave devices over the Internet

Let traditional Modbus serial devices talk over the Internet…

Many traditional serial Modbus devices can talk over RS-485, but the RS-485 network limits the maximum number of Modbus devices to 32, provided the transmission distance does not exceed 1.2 km.

By using Modbus Gateway, you can link all Serial Modbus devices over an Ethernet network. Up to 8 Modbus Gateways can be installed in the same control network, extending the coverage of a single Modbus network as far as a TCP/IP network can reach.

NPort 6110	RS-232	Modbus/RTU
		Master device
Ethernet
NPort 6110		NPort 6110	NPort 6110
RS-232		RS-485	RS-485

Modbus/RTU

Slave devices

Flow meter	Loop controller	PLC
Drives	Power measurement	DCS

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