Evaluation Of The Operator Controls; Overview; Evaluating Operator Controls As Direct Keys - Siemens SIMATIC HMI Operating Instructions Manual

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5.5.4

Evaluation of the operator controls

5.5.4.1

Overview

Operator controls
The following information can be transferred between the HMI device and the PLC:
● Direction pulses of the handwheel
● Status of the function keys
● Status of the key-operated switch
● State of the illuminated pushbuttons
● State of the function keys and illuminated pushbutton LEDs
There are two ways of transmitting information:
● Direct keys
● System functions of WinCC flexible
5.5.4.2

Evaluating operator controls as direct keys

Introduction
You can configure the operator controls of the HMI device as direct keys.
The states of the following operator controls are available directly in the I/O area of the PLC:
● Direction pulses of the handwheel
● The switching state of the function keys
● The switching state of the key-operated switch
● The switching state of the illuminated pushbuttons
Byte assignment
The following figure shows the assignment of the keys (inputs) and LEDs (outputs) to the
bytes in the PLC process image.
Check whether additional information is available in your plant documentation.
Mobile Panel 277F IWLAN
Operating Instructions, 12/2007, A5E01003940-01
Illuminated pushbutton
Note
The following sections are intended for the configuration engineer of the HMI device.
Operator controls and displays
5.5 Operator controls
107