Bernecker + Rainer 4MP181.0843-03, Руководство пользователя

Страница: 120 / 160

120
Standards and Certifications • Standards and Definitions for Safety Technology
Mobile Panel User's Manual V 1.5
Begin at the starting point shown and follow the parameters S, F and P to the safety category to
be used.
Restart inhibit according to EN 1037/04.96 (Safety of machinery - prevention of
unexpected start-up)
Keeping a machine in an idle state when people are working in the danger zone is one of the
most important requirements for safe operation of machines.
Starting refers to the transition of a machine or its parts from an idle state to moving state. Any
start is unexpected if it is caused by:
• A start command sent because of a controller failure or because of external influences on
the controller.
• A start command sent because of incorrect operation of a start element or another part
of the machine.
• Restoration of power supply after an interruption.
• External/internal influences on parts of the machine.
To prevent unexpected starting of machines or parts of machines, power should be removed and
dissipated. If this is not practical (e.g. frequent, short work in danger zone), other measures must
be taken:
• Measures to prevent random start commands.
• Measures to prevent that random start commands cause unexpected starting.
• Measures to automatically stop dangerous parts of the machine before a dangerous
situation can be caused by unexpected starting.
Parameter S ... Seriousness of injury
S1 Light (usually reversible) injury.
S2 Serious (usually irreversible) injury.
Parameter F ... Frequency and/or duration of the danger exposure
F1 Seldom to slightly more frequent and/or short exposure duration.
F2 Frequent to continuous and/or long exposure duration.
Parameter P ... Possibility to prevent danger
P1 Possible under some conditions.
P2 Nearly impossible.
Table 65: Parameters S, F and P lead you to the safety category to be used