Stop Button - Siemens SIMATIC HMI Mobile Panel 277 RO Operating Instructions Manual

Safety instructions and general notes

2.8 STOP button

2.8 STOP button
Safety instructions
The STOP button on the HMI device brings about a safety-related stop of the system or
machine 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.
Stop loop through
The Stop or Emergency Stop circuit of the system or machine is looped through the
connection box PN Plus and not interrupted.
Interruption of the Stop or Emergency Stop circuit takes place in the following cases:
● If the Stop button is pressed on a connected Mobile Panel 277 RO
● If a Mobile Panel 277 RO with pressed STOP button is connected
HMI device with STOP button
If the HMI device is equipped with a STOP button and is not connected to the connection
box, a Stop cannot be initiated using the HMI device. The STOP button of the HMI device is
then ineffective!
Install stationary Emergency Stop buttons that are available at all times in the system.
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. Releasing the
STOP button must not cause a hazardous situation (see also EN 60204-1:2006
Section 9.2.5.3).
The stop function is not to be used as a replacement for safety equipment.
Note
Connection boxes in a system
Install only one type of connection box in your system - in other words, only PN Plus
connection boxes.
Mobile Panel 277 RO connected
If the Mobile Panel 277 RO is connected to the connection box, the STOP button on the
Mobile Panel 277 RO can trip if it falls, thus causing the system to come to a standstill.
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WARNING
Operating Instructions, 10/2015, A5E36824256-AA
Mobile Panel 277 RO