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2.6
Safety functions of the EMERGENCY STOP button
The EMERGENCY STOP button on the HMI device brings about a safety-related stop of the
plant in accordance with IEC 60204-1, Section 9.2.5.3. You can implement a Category 0, 1,
or 2 stop function in accordance with IEC 60204-1, Section 9.2.2. The stop function category
must be selected on the basis of a risk assessment.
The following requirements must be met in order to render the EMERGENCY STOP button
effective:
● The HMI device must be operated in the docking station or with the main rechargeable
battery.
● A project is running on the HMI device.
● 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 lit.
● The EMERGENCY STOP button is enabled.
As soon as the PROFIsafe communication between the HMI device and controller is
established within the WLAN range, the EMERGENCY STOP button on the HMI device
becomes active. The EMERGENCY STOP button is enabled within the WLAN regardless of
whether or not the HMI device is logged onto a machine.
WARNING
EMERGENCY STOP button not available
The EMERGENCY STOP button on the HMI device may not used as a replacement for a
permanently-wired EMERGENCY STOP or EMERGENCY OFF on the machine.
Install stationary EMERGENCY STOP buttons that will be available at all times on the
configured system.
EMERGENCY STOP button not enabled
If a communication error triggers a global rampdown, the EMERGENCY STOP button will
no longer be available on the affected HMI device.
You have the option of interconnecting the "Global Rampdown" signal so that an
EMERGENCY STOP is triggered.
EMERGENCY STOP button out of service when HMI device is removed
If the HMI device is not integrated in the safety program of the F-CPU, the EMERGENCY
STOP button will be out of service.
To avoid confusion between HMI devices with enabled and disabled EMERGENCY STOP
buttons during an emergency, only one integrated HMI device should be freely accessible.
If an HMI device is not integrated and not in use, store the HMI device in a location with
protected access.
Category 0 or 1 Stop
If a Category 0 or 1 stop circuit is implemented, the stop function must be effective
regardless of the operating mode. A Category 0 stop must have precedence. Release of
the EMERGENCY STOP button must not cause a hazardous situation (see also EN 60204-
1, Section 9.2.5.3).
The stop function is not to be used as a replacement for safety equipment.
Wireless Teach Pendant F IWLAN V2
Operating Instructions, 08/2010, A5E02453837-01
Safety instructions and standards
2.6 Safety functions of the EMERGENCY STOP button
PRELIMINARY II
1.7.2010
41
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