
Glossary
TP 270, OP 270, MP 270B (WinCC flexible)
Operating Instructions, Edition 03/2004, 6AV6691-1DD01-0AB0
C-5
Screen
A screen displays all the logically related process data on the HMI device. The display of the
process data can be supported by graphic objects.
Screen object
A configured object for displaying or operating the system being monitored, e.g. a rectangle,
an I/O field or recipe view.
Softkey
A key on the HMI device which can be configured as required. A function is assigned to the
key during the configuration. The assignment of the softkeys may be dependent on the
screen being displayed or independent of the screen displayed.
Start
A project can be started by means of a button in the loader. This process is referred to as
starting or booting.
STEP 7
Programming software for SIMATIC S7, SIMATIC C7 and SIMATIC WinAC.
Symbolic I/O field
A field for the input/output of a parameter. It contains a list of predefined entries from which
one can be selected.
System alarms
Assigned to the "System" alarm class. A system alarm makes reference to internal states in
the HMI device and the PLC.
System, monitored
A general term for machines, processing centers, systems and plants as well as processes
which are to be operated and observed by an HMI device.
Tab order
Defined during the configuration to set the It sets the sequence in which objects are focused
on when the <TAB> key is pressed.
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