Safety instructions, standards and notes
2.8 Safety functions of the enabling button
Fail-safe operation of the Mobile Panel 277F IWLAN
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Function Manual, 08/2008, 6AV6691-1FQ01-2AB0
The Stop category of the enabling device must be selected on the basis of a risk assessment
and correspond to a Category 0 or 1 Stop.
WARNING
Injury or material damage
Enabling buttons should only be used when the following applies for the person activating
the enabling button:
•
The person can see the danger zone.
•
The person is capable of recognizing personal injury hazards in good time.
•
The person is capable of taking immediate measures to avoid danger.
The only person allowed to remain in the danger zone is the person who is activating the
enabling button.
Commands for unsafe conditions are not permitted to be issued with one enabling button
alone. For this purpose, a secondary, intentional start command by means of a button on
the Mobile Panel 277F IWLAN is required.
The following happens if you leave the effective range for a period of up to 30 seconds with
the enabling button pressed: Enabling is revoked 5 seconds after leaving the effective
range.
If you reenter the effective range within 30 seconds, you must release the enabling button
and press it again for enabling to take effect again.
NOTICE
Enabling button not effective
The enabling button is only effective if the HMI device is logged on in the effective range
and the "RNG" LED on the HMI device lights up.
If the operator leaves the effective range, the enabling button is deactivated after 5
seconds. The "Exit effective range without logoff" dialog opens after 30 seconds. The
"RNG" LED only goes off when the operator confirms this dialog.
Risk from improper use
To avoid the danger of unauthorized use of the enabling button due to impermissible hold-
down, on each project start the enabling button must be pressed all the way down, and then
released.
See also
Enabling button (Page 22)