Delta AH500 Hardware Operation Manual page 416

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Method 2
Select a PLC or a device on the device list, and then drag it to a position in the working area.
The users can add a user-defined Modbus device to the working area. After the users select MODBUS
Device on the device list, and add it to the working area in one of the two ways described above, the Custom
Device window will appear. The users have to type a name in the Name box, select a number in the The
number of ports drop-down list box, and click OK. (A user-defined Modbus device can have three ports at
most.)
The users can add network modules to the working area. However, if the devices deployed in the working area
include AH500 series CPU modules for which projects are created, the users can not connect network
modules to the CPU modules. If the users want to connect network modules to the CPU modules, they have
to close the NWCONFIG window, configure the network modules in HWCONFIG, and save the setting in
HWCONFIG. After the users open the NWCONFIG window again, the system will update the network
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