Siemens SINUMERIK 802D sl Programming And Operating Manual page 281

Figure 10-4
This window displays all logical and graphical information of the PLC program running in the
appropriate program block. The logic in the LAD (ladder diagram) is divided into clearly
structured program parts and current paths, called networks. Generally, programs written in
LADs represent the electrical current flow using various logical operations.
Figure 10-5
In this menu, you can switch between symbolic and absolute representation of the operand.
Program sections can be displayed using various zoom factors; a search function is provided
to find operands quickly.
This softkey can be used to select the list of the PLC program blocks. Use the cursor or
<Page Up>/<Page Down> keys to select the PLC program block to be opened. The current
program block is displayed in the Info line of the list box.
Grinding
Programming and Operating manual, 06/2006, 6FC5398-4CP10-0BA0
Status list
Window 1, OB1
PLC diagnosis represented as a ladder diagram
10.2 Operating options
10-5