Download TP 277, OP 277 (WinCC flexible) - Service, Support

Operating a Project
8.5 Entering Values Using the Keys
Function keys
Function keys
Function key assignment is defined during configuration. The configuration engineer can
assign function keys globally and locally.
Function keys with Global Function Assignment
A globally assigned function key always triggers the same action on the HMI device or in the
PLC irrespective of the screen displayed. An example of such an action is the activation of a
screen or the closing of an alarm window.
Function keys with Local Function Assignment
A function key with local function assignment is screen-specific and is therefore only
effective within the active screen.
The function assigned locally to a function key can vary from screen to screen.
The function key of a screen can be assigned one function only, either a global or local one.
The local assignment function takes priority over the global setting.
The configuration engineer can also assign function keys so that you can use the function
keys to operate operator controls. for example the Alarm view, Trend view, Recipe view or
General Procedures
The control keys and function keys are available for keyboard control.
General Procedure
The operator controls of a screen are operated using the HMI-device control keys.
Proceed as follows:
1. Press
or the cursor keys until the desired operator control is selected within the
2. Depending on the operator control, perform further actions. Detailed descriptions can be
found with the respective operator control.
– I/O field: Enter numerical, alphanumeric or symbolic values in the IO field.
– Slider control: Move the slider control.
3. Confirm your operation with
TP 277, OP 277 (WinCC flexible)
Operating Instructions, 09/2007, 6AV6691-1DH01-0AB0
or cancel operation with