Siemens S7-300 - Page 102

Machine and cam data
9.14 Cam data
FM 352 electronic cam controller
102 Operating Instructions, 05/2011, A5E01071724-03
Note
The actual lead time is always less than the assigned lead time. It may be 0, even though
the assigned lead time ≥100 µs.
The anticipation distance of a rotary axis must be less than the rotary axis range and the
inactive part of the cam. This must be ensured for all velocities.
Dynamic cam adjustment
There are two distinct situations relating to the cam range:
1. The static and dynamic range of the cam overlap.
2. The static and dynamic range of the cam do not overlap.
Table 9- 1 Dynamic cam adjustment (different use cases)
Dynamic adjustment Description
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If the dynamic range of the cam overlaps its static range:
 The cam is activated when its dynamic range is reached.
At the same time, calculation of a new dynamic
adjustment is disabled.
 When the actual value reaches the static range of the
cam, the calculation of a new dynamic adjustment is
enabled again. A change in velocity affects the cam end.
 When the cam is deactivated at the end of the dynamic
range, dynamic adjustment will be disabled again until
the end of the static range of the cam.
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If the cam's dynamic and static ranges do not overlap:
 The cam is activated when its dynamic range is reached.
At the same time, calculation of a new dynamic
adjustment is disabled.
 At the end of the static range of the cam, dynamic
adjustment is enabled again.
Dynamic range
Static range
A new dynamic adjustment is possible
Note
When the direction of rotation changes, calculation of the dynamic adjustment is enabled
again.