Siemens S7-300 - Page 79

Machine and cam data
9.7 Machine data of the axis
FM 352 electronic cam controller
Operating Instructions, 05/2011, A5E01071724-03
79
Hysteresis
Address Name Type Initial value Comment
80.0 HYS DINT L#0 Hysteresis
Ranges:
0 to 65 535 [Imp] x resolution [
µm
/
Imp
]
The range of values is determined by the resolution:
Maximum input value:
- to linear axes: max. input value < ¼ of the working range
- to rotary axes: max. input value < ¼ of the rotary axis range
Position-based cams and hysteresis
A position-based cam is activated if:
● the detected actual value lies within the position-based cam, and
● no hysteresis is set.
Switching points may vary, depending on the position of the direction reversal.
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Cam
Hysteresis
1) Cam is activated, as the cam start is crossed in the positive effective direction.
2) The cam remains active due to the hysteresis, irrespective of a direction reversal.
3) At the end of hysteresis, the cam is deactivated.
4) Cam remains deactivated after a direction reversal.
5) The cam is activated again at the end of the hysteresis.
Figure 9-1 Enabling position-based cams with hysteresis
Note
When the direction is reversed, the hysteresis cannot reduce a cam actuation time shorter
than the hysteresis.