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3) Utility software pop-ups “Search Device(s)” window, and the window displays
IP address and MAC address of module.
Fig 5-40
Note:This function is used only in LAN, not used in WAN or direct connect to
computer.
5.2.10 Description of Modbus-TCP protocol
The Modbus-TCP protocol is used for communication in Ethernet modules. The
protocol sets up master/slave link in Ethernet. First, master device (client) sets
up TCP link with slave device (server). Second, master device sends request
frame to slave device, and slave device receives request frame and returns
response frame to master device. Fig 5-41 displays working mode of Modbus-
TCP protocol.
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