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Figure 3.29 Download gateway configuration
7. After setting up, two different Modbus RTU/ASCII networks are accessed through
the corresponding serial ports. The gateway acts as slave station in both Modbus
RTU/ASCII networks. The Modbus RTU/ASCII master stations in both networks can both
read and write the gateway's” internal gateway data storage area” the Modbus RTU/ASCII
protocol. The gateway realize communication between the Modbus TCP client and the
Modbus RTU/ASCII master by taking the role of a data relay.
3.4.4 Implementing Modbus TCP Client and Modbus
RTU/ASCII Master Simultaneously Accessing One Modbus
RTU/ASCII Slave Station
3.4.4.1 Application topology diagram