Evaluation Of The Key-Operated Switch With System Functions; Evaluation And Activation Of The Illuminated Pushbuttons - Siemens SIMATIC HMI Operating Instructions Manual

Operator controls and displays
5.5 Operator controls
5.5.4.5

Evaluation of the key-operated switch with system functions

Application
The key-operated switch is an optional operator control of the HMI device. The key-operated
switch serves to lock functions in a running project which can be triggered by means of the
HMI device.
Bit assignment
The following table shows the bit assignment for the tag of the key-operated switch:
Note
If you use a tag of the "Boolean" type for the key-operated switch, the following assignment
applies:
• Status "0": Central position of the key-operated switch
• Status "1": Key-operated switch turned clockwise or counter-clockwise to the stop
5.5.4.6

Evaluation and activation of the illuminated pushbuttons

Application
The illuminated pushbuttons are optional operator controls of the HMI device. The integrated
LEDs can be controlled from the PLC.
The LEDs can assume the following states:
● Off
● Flashing slowly
● Flashing quickly
● On
You can use the LEDs to signal to the user that a function key should be pressed in a
running project.
Bit assignment
The following table shows the bit assignment for the status tags of the illuminated
pushbuttons:
112
Bit 1
0
0
1
Bit 0 Key position
0 Central position
1 Turned in clockwise direction up to stop
0 Turned counter-clockwise up to stop
Operating Instructions, 12/2007, A5E01003940-01
Mobile Panel 277F IWLAN