Pilz PSEN opII3H Series - Override Function

Appendix
Operating Manual PSEN opII3H Series
1003503-EN-08
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19.2.7 Override
The override function is used to override the muting function in the event of an error.
Override enables the machine to be operated manually, to remove material from the safe-
guard's protected field for example.
Override must only be available when at least one muting sensor has triggered and the pro-
tected field is blocked.
One exception is when override is only used for the output. In this case, override is also
permitted if the safety light curtain is in an OFF state, but no muting sensor has been
triggered.
Activating the override must not initiate motion. A separate control device must be operated
to initiate this motion.
Comply with the override start-up conditions required by the standard IEC62046.
Start-up conditions, when safety light curtain and danger zone are visible from the
location from which the override is started:
} Override must be started using a hold-to-run control device. The control device must be
positioned so that entering the danger zone is impossible as long as the hold-to-run con-
trol device is active. Or
} Override must be started by operating and releasing a pushbutton, triggering an override
time, the maximum length of which is defined by a risk assessment.
Start-up conditions, when the danger zone is not visible from the location from
which the override is started:
} Override must be started using a spring return key switch (or a pushbutton with equal se-
curity).
– The spring return key switch (or pushbutton with equal security), must be positioned
so that the danger zone cannot be entered while this switch is operated and
– The safety light curtain that has been overridden must be visible from the location
from which the override is initiated, and
– Before initiating the override, it must be possible to inspect the area secured by the
safety light curtain and
– Access to the danger zone must not be possible during the override sequence and
– It must be possible to initiate an emergency stop from the same location.
Comply with the override shutdown conditions required by the standard IEC62046.
} The muting-dependent override function must be ended automatically when one of the
following conditions arises:
– All muting sensors are deactivated and the safety light curtain's protected field is clear
or
– A pre-set time limit has expired or
– The hold-to-run control device is released or
– An interlock state is detected.