Siemens SIMATIC HMI TP 070 Equipment Manual page 27

5.2 State Button
Purpose
The state button is an operating and display element with the two states ON and
OFF . State buttons indicate the status of a unit which cannot be determined from
the operating unit (e.g. a motor). At the same time, it is also possible to change
the status of the unit concerned on the operating unit.
Configurable properties
The behavior of the state button can be configured:
Option: switch :
The state button reacts as a toggle switch. Each time it is operated, it switches
to the other status and remains in that status until the button is pressed again.
In addition to the tags, which represent the current switch status, the
configuration software can be used to define text or graphics for the two
statuses ON and OFF .
Option: key :
The state button reacts as a key–in button. When pressed, the state button
changes to the status ON . It remains in this status as long as the state button is
pressed. When released, it automatically switches back to OFF .
Event–related initiation
Use the configuration software to assign the state button one or more functions
and to define which events result in the respective function being triggered. The
events which can be configured are:
Status change
This function is triggered as soon as the status of the state button changes.
Press
This function is triggered as soon as the state button changes to the status ON .
Release
This function is triggered as soon as the state button changes to the status
OFF .
If the status of the state button changes from the type switch due to a modification
of the configured variables, none of the described events is triggered.
TP 070 Equipment Manual
Release 03/00
Operation of Screen Objects
5-3