Siemens Simatic S7-200 System Manual page 65

Forcing Variables Using the Status Chart
To force a variable in the Status Chart to a specific value, follow these steps:
1. For a cell in the Address column, enter the address or symbol name of the variable that
you want to force.
2. If the element is a bit (I0.0, Q0.1), the format is always bit and cannot be changed. If the
element is a byte, word, or double word, select the format that you wish to use by
double-clicking or pressing the
3. To force the variable to its current value, first read the current values in the PLC by
selecting the menu command Debug
button
Click or scroll to the cell that contains the current value you wish to force. Press the Force
button
4. To force a new value for a variable, enter the desired value in the "Change Value"
column and press the Force button.
5. To view all currently forced variables, click the Read Force button.
6. To unforce all currently forced variables in the CPU, click the Unforce All button.
Editing Addresses
To edit an address cell, use the arrow keys or mouse to select the cell you want to edit.
If you begin typing, the field clears and the new characters are entered.
If you double-click the mouse or press
the arrow keys to move the editing cursor to the place that you want to edit.
S7-200 Programmable Controller System Manual
C79000-G7076-C230-02
Installing and Using the STEP 7-Micro/WIN Software
SPACEBAR
.
while positioned on a current value to force the variable to that value.
F2
to cycle through the valid formats.
Single Read or clicking the Single Read
, the field becomes highlighted and you can use
3-35