Delta AH500 Hardware Operation Manual page 420

There are several ways to connect the nodes in the working area to networks.

Connecting a port to a network by means of dragging the port
The users press the left mouse button while the mouse cursor hovers over a port. A dotted line is under
the existing network.
The users move the mouse cursor to the existing network while holding the left mouse button down. If the
network matches the port, the port will connect to the network after the users release the left mouse
button.
If the users move the mouse cursor to the dotted line while holding the left mouse button down, the port
will connect to a network which matches the port.

Connecting a single device or several devices to an existing network
(1) The users hold down Shift on the keyboard while they click devices and a network. They have to
conform to the two principles below.
(a) PLCs and modules are independent devices. A device that the users click must have at least one
port which is not connected to any network, and matches the network clicked.
(b) The users can click several devices, but they can only click one network.
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