Chapter 10 Ladder Diagram If users click on the toolbar, a blank network will be put above the network selected. 10.1.3 Selecting Objects Before an object in a network in a ladder diagram is selected, users have to press Esc on the keyboard, or click on the toolbar. After the cursor appears as a small arrow, the users can click the object in the network. The basic selection is shown below. Selecting the network Selecting the input contact Selecting the network Selecting the output coil Selecting the block If users want to select a group of devices, they can click a device, and drag it to draw a frame round the group of devices.
The users can also select the group of devices by clicking the first device, pressing Ctrl+B on the keyboard, clicking the last device, and pressing Ctrl+B on the keyboard. Users must draw a frame round devices which are in the same network, and the devices must be adjacent to one another. Besides, input devices and output devices can not be in the same frame. 10-5