Enabling Button - Siemens SIMATIC HMI Operating Instructions Manual

Operator controls and displays
5.4 Safety-related operator controls
Storing the HMI device
Non-functional emergency stop button
If the HMI device is not integrated in the safety program of the F CPU, the emergency stop
button does not function.
To avoid confusion between effective and non-effective emergency stop buttons, only one
integrated HMI device should be freely accessible.
If the HMI device is not in use, it must be stored in a locked cabinet.
See also
Safety functions of the emergency stop button (Page 43)
5.4.2

Enabling button

Introduction
The enabling device consists of the two enabling buttons mounted on both sides of the
Mobile Panel 277F IWLAN. The switch setting of the two enabling buttons is determined by
electrical momentary contact switches.
Note
The HMI device analyzes the switch settings of the two enabling buttons in the form of an
OR gate.
①
102
WARNING
Enabling button
Mobile Panel 277F IWLAN
Operating Instructions, 12/2007, A5E01003940-01