Siemens Multi Panel MP270 SIMATIC HMI Equipment Manual page 38

Operating Special Screen Objects
Table 5-1 Screen objects configurable for the MP270, continued
Screen object
Text
Graphics
Line
Rectangle/Square
Rounded rectangle/square
Circle/Ellipse
Polyline/Polygon
Button
Invisible button
Bar
Trend graphic
5-2
Use/Description
Text is used during configuration to label operating and
display elements, for example. Text on the MP270
cannot be modified.
The importance of different texts within a screen can
be distinguished by assigning different fonts and
formats.
Text can be configured to cover several lines and
aligned horizontally and vertically.
Graphics can be used in the configuration, e.g. to
represent a system or as an illustrative symbol for
configured display and operating elements.
Graphics cannot be modified on the MP270.
These objects are combined to produce vector
graphics with a simple basic geometrical form in the
configuration. The type, color and width of the lines
and their transparency, color filling, rounding radius,
etc. can be configured as desired.
Vector graphics cannot be operated.
A button is a virtual key located on the MP270 screen
which can be assigned with one or more functions,
according to the configuration.
After pressing the button, the functions configured for
the event press are triggered. On releasing the button,
the functions configured for the event release are
triggered.
An invisible button is a transparent button which is not
displayed on the operating unit. If invisible buttons are
located over graphics, for example, it is possible to
operate part of the graphic, e.g. a motor or valve.
After pressing the button, the functions configured for
the event press are triggered. On releasing the button,
the functions configured for the event release are
triggered.
Bars represent values from the PLC as rectangular
areas. The MP270 thus provides a clear indication of
how far the current value is from the limit values, or if a
setpoint value has been reached, at a glance. Bars are
often used to represent fill levels or workpiece
numbers.
Direction, scaling, bar and background color and
labelling the Y-axis can be configured as required. In
order to identify limit values, limit value lines can be
called in.
Trend graphic on the MP270 provides an especially
clear representation of continuous process data
values.
Several different trends can be depicted at the same
time.
Notes on operation are provided on Page 5-11.
MP270 Equipment Manual
Release 01/99