Safety Functions Of The Stop Button - Siemens SIMATIC HMI Mobile Panel 277 RO Operating Instructions Manual

Operator controls and displays
5.1 Operator controls and displays on the Mobile Panel 277 RO
Operation
The STOP button is operated by pressing the button. Once the stop operation has been
initiated, the STOP button remains engaged in the stop position.
Note
The STOP button engages compulsorily when activated!
Releasing the STOP button
Releasing the STOP button
If you have activated the STOP button and thereby brought the monitored system to a
standstill, the STOP button may only be released under the following conditions:
• The reasons for the stop have been eliminated.
• A safe restart is possible.
In order to release the STOP button, turn it in a clockwise direction. The STOP button then
returns on its own to the starting position.
5.1.3.2

Safety functions of the STOP button

The STOP button on the Mobile Panel 277 RO brings about a stop of the system being
monitored in accordance with EN 60204-1:2006, Section 9.2.5.3. You have the option of
implementing a Category 0, 1, or 2 Stop function in accordance with EN 60204-1:2006,
Section 9.2.2. The stop function category must be selected on the basis of a risk
assessment.
The stop function of the mobile panel can therefore be used as a safe machine stop as well
as for looping in the emergency stop circuit of the system to be monitored.
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WARNING
Operating Instructions, 10/2015, A5E36824256-AA
Mobile Panel 277 RO