Operating A Keyboard Device; Functions Of The System Keys - Siemens SIMATIC TP 270 Operating Instructions Manual

9.1.3

Operating a keyboard device

9.1.3.1

Functions of the system keys

Overview of system key functions
Note
The availability of system keys is determined by the HMI device used.
Key Function
Shift (digits/letters)
A-Z
Deleting characters
INS
DEL
Cancel
ESC
Acknowledge
ACK
Display operator notes
HELP
Enter
ENTER
Tab
TAB
Deleting characters
TP 270, OP 270, MP 270B (WinCC flexible)
Operating Instructions, Edition 03/2004, 6AV6691-1DD01-0AB0
Purpose
Toggles the assignment from numbers to letters.
No LED is lit:
•
The number assignment is enabled. One actuation of the
button toggles to letter assignment.
One LED is lit:
•
The left or right letter assignment is enabled.
Each time the key is pressed, the system toggles between the
right letter assignment and number assignment.
Deletes the character at the current cursor position.
•
Deletes the input characters of a value and restores the
•
original value.
Closes the active window.
•
Acknowledges the currently displayed error alarm or all
alarms of an acknowledgement group (group
acknowledgement.)
The LED is lit as long as unacknowledged error alarms are
queued.
Opens the configured operator note for the selected object
(e.g. a alarm, I/O field.) The LED signals an that an operator
note exists for the selected object.
Applies and closes the input
•
Opens a drop-down list for symbolic I/O fields
•
Triggers buttons
•
Selects the next available screen object in the configured tab
sequence.
Deletes the character to the left of the current cursor position.
Operate project
9.1 Basic principles of operation
9-11