Safety engineering
Safety functions
Safe operation mode selector
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EDS94AYAE EN 6.0
1.3.11.3 Activation
How to activate the function:
ƒ Via a safe input which has been assigned to the function by parameterisation. In
addition, the requested operating mode depends on OMS: Function at LOW level
(C15202).
Example:
Normal operation at LOW level
The special operation is activated via a key−operated switch. The "Special operation
with LOW level" function is not permissible for a key−operated switch which uses the
special operation for short−circuiting purposes. An open circuit in the cable of the
switch would activate the special operation which is otherwise only possible with a key.
Special operation at LOW level
The special operation is active if a safety grid (safety door) is openend, i.e. the safe input
provides a LOW level and executes the parameterised stop function.
Only if no safe input is used, the function can only be activated via the safety bus:
ƒ A data telegram with corresponding contents must be transmitted to the standard
device.
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