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3.5
Forcing I/O
The Force I/O menu is only available if the force-menu enable is set in the TD 200
configuration that is stored in the CPU. The Force I/O menu allows you to force inputs, force
outputs, or unforce all inputs and outputs.
In the S7-200 CPU, you can establish password protection for the force I/O function. The TD
200 reads the password protection level from the CPU. If the force function is password
protected, the TD 200 asks you to enter the CPU password.
Note
The CPU password restricts editing of the force information in the S7-200 CPU. This
password is different from the password protection offered by the TD 200, which restricts
the editing of variables that are embedded in a message.
Accessing the Menu
To access the Force I/O menu, perform the following steps.
Key
1.
ESC
2.
3.
ENTER
Note
Pressing ESC at any time while you are forcing I/O returns you to the Display Message
mode. The TD 200 automatically returns to the Display Message mode after one minute if
no keys are pressed.
SIMATIC TD 200 Operator Interface
C79000-G7076-C205-04
Action
The TD 200 enters the Menu mode.
The TD 200 scrolls down the menu options
two times.
The TD 200 enters the Force I/O menu. If a
force function is password protected, the
TD 200 displays the following.
Operating the TD 200
Display
MENU MODE:
VIEW MESSAGES
MENU MODE:
FORCE I/O
PASSWORD REQUIRED
PASSWORD ********
3-9
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