Status View (Online) - Siemens SIMATIC S7-200 Manual

First programming exercise

4.8 Status view (online)

4.8 Status view (online)
Select the menu item Debug > Start
Program Status to activate the status view
of the ladder diagram.
You can now view the status of the
operands in the PLC.
In the example, switch S0 is connected to
input I0.0.
If you now actuate the switch and observe
the program in ladder status view, the
operations which are passing current
(true) are filled in blue.
The status of the operations is read
cyclically from the PLC and updated on
the screen.
In this context, online means looking
inside the controller with a PC/
programming device to view the current
states and their cyclic changes.
Very fast events cannot be tracked in this way because the time required to transfer the
data to the screen is too long. A status view is also possible for a function block diagram
(FBD).
28
Getting Started - Beginners
Training Documents, 07/2007, A5E01031470B