Aborting An Edit - Siemens SIMATIC TD 200 User Manual

If there are more editable variables in the message, the cursor moves to the next variable.
After all of the variables in the message have been edited, the message-enable bit for the
message is cleared in the CPU. The message is then removed from the display on the next
update cycle.
If you do not edit the message variable, or if you abort the edit by pressing ESC, the
message-enable bit is not cleared by the TD 200. The message-enable bit is cleared by the
TD 200 only when you write the last editable variable to the CPU.
The UP and DOWN arrows that indicate higher and lower priority messages, if any are
present, are disabled while an edit is in progress. These functions are restored when the edit
is completed or aborted.

Aborting an Edit

You can abort an edit at any time by pressing ESC. This causes the TD 200 to reread the
message from the CPU and to display the variables from the CPU. When the edit session is
aborted, any values that have already been sent to the CPU (by pressing the ENTER key
after modifying the value) are displayed; any value that was modified but not saved is
overwritten by the previous (original) value.
When you abort an edit, the cursor returns to the left-most character of the message. (The
message is not removed from the display until all of the edits are completed and written to
the CPU.) If the message was configured for acknowledgement, the message starts to flash
again, since the edit was not completed.
Note
An edit is automatically aborted if you do not press a key after one minute.
SIMATIC TD 200 Operator Interface
C79000-G7076-C205-04
TD 200 Parameters and Messages
D-23