Chapter 20 Network Configuration and Data Exchange Method 2 Select a PLC or a rack in the working area, and then double-click a network module on the device list. After the users add a network module to a node, the slot in which the network module is installed, and the backplane on which the network module is installed may be different from the actual slot in which the network module is installed, and the actual backplane on which the network module is installed. The users have to adjust the properties of the node. 20-17