
B-64004EN/02 3.SAFETY FUNCTIONS
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IMPORTANT
1 A gear ratio, ball screw, and the like must be
carefully selected so that a safe speed can be kept
on the feed axis.
2 Before inputting the Guard Open Request signal
(ORQ), reduce each axial speed and spindle speed
to a safe speed range or below. If a speed exceeds
the limit, do not unlock the protective door. The
PMC ladder must be designed that the power to
the driving circuit is shut off (safe stop state) if the
door is forced open.
WARNING
The safe speed monitoring function monitors
whether the traveling speed exceeds a specified
limit. The function cannot monitor the stop state
(zero speed). If an error causes a movement on
the feed axis at a speed lower than the safe speed
range while the protective door is open, for
instance, the function cannot detect this state. The
machine must be designed so that this state does
not affect the safety of the machine system.