ctrlX SAFETY "SafeMotion"
Safety characteristics of the safety system
Table 9: Variable description to calculate PFH for a safety zone
Variable Value Description
PFH
selection_discrete
See manufacturer's specifica-
tion
Enter the sum of the individual PFH values of the
switches or safety devices involved in the selec-
tion. No distinction is made as to which safety
functions are selected in the drive.
PFH
compact safety con-
troller
See manufacturer's specifica-
tion
PFH value of the safety control.
PFH
axis_x
See ⮫ Calculating the PFH
component of an axis
This value depends on the parameterized safety
functions and has to be calculated for each axis
of the safety zone.
Legend:
1):
PFH=(1-DC)/MTTFD
®
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