Siemens SIMATIC STEP 7 V5.2 Getting Started page 72

Downloading and Debugging the Program
Monitoring Variables
Modifying Variables
Enter the value "1500" for the address MW2 in the Modify Value column and
"1300" for the address MW4.
7-10
Click the Monitor Variables button in
the toolbar. The operating mode of the
CPU is displayed in the status bar.
Press Key 1 and Key 2 in your test
configuration and monitor the result in
the variable table.
The status values in the variable table
will change from false to true.
Transfer the modify values to your
CPU.
STEP 7 Getting Started
A5E00171228-01