Enabling Button - Siemens SIMATIC HMI Operating Instructions Manual

Safety instructions, standards and notes

2.8 Enabling button

Effectiveness of the emergency stop button
The following requirements must be met in order to render the emergency stop button
effective:
• The HMI device must be operated in the charging station or operated with the battery.
• The project must be running on the Mobile Panel 277F IWLAN.
• The HMI device must be integrated in the safety program of the F-CPU.
If these prerequisites are satisfied the following applies:
• The "SAFE" LED on the HMI device is illuminated.
• The emergency stop button of the Mobile Panel 277F IWLAN is effective.
Category 0 or 1 Stop
If a Category 0 or 1 Stop circuit is implemented, the stop function must be in effect
regardless of the operating mode. A Category 0 Stop must have precedence. Release of
the emergency stop button should not cause a hazardous situation (see also EN
60204:1997 chapter 9.2.5.3).
The stop function is not to be used as a replacement for safety equipment.
Storing the HMI device
Non-functional emergency stop button
If the HMI device is not integrated, 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 area.
See also
Emergency stop button (Page 100)
2.8 Enabling button
Introduction
The enabling device consists of the two enabling buttons mounted on both sides of the
Mobile Panel 277F IWLAN.
Numerically controlled machines and systems are equipped with the operating modes
"Automatic mode" and "Special mode".
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WARNING
WARNING
Mobile Panel 277F IWLAN
Operating Instructions, 12/2007, A5E01003940-01