Eaton easySafety, Руководство пользователя

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Safety function blocks
346
02/16 MN05013001Z EN
If required the function block can also work if the EN enable
coil is not used. For this the enable parameter must be set to
NEN (factory setting).
If an enable is required (Parameter: EN), the EN coil (e.g.
ES01EN) is either addressed from the safety circuit diagram
or from the standard circuit diagram.
Operating mode parameter, RE reset coil
(factory setting: MST)
This parameter is used to set the startup behaviour of the
safety function block. The manual restart function prevents
uncontrolled starting after the power supply is switched on
and after the protected area is given clearance.
• AST (Automatic start)
The enable contact closes as soon as the input circuit or
circuits are closed, i.e the protected area is given clear-
ance. If the RE reset coil is wired and the Automatic Start
operating mode (AST) is set, the following warning will
appear: “The reset is switched although the Automatic
Start mode is selected”.
h
The improper use of the EN enable coil as a safety input
can lead to an undetected accumulation of errors. This is
not permissible and must be precluded by means of a safe
control system design!
h
Ensure that the AST parameter setting causes the unex-
pected startup of the machine or an uncontrolled change
in the speed of the machine. This must be excluded by the
design of a safe control system!