Danfoss VLT Series Programming Manual page 49

Servo Drive Operation
0 1
Change CAM Imm=1
Use blend dist=0
Active
CAM 2 CAM 3
CAM
InSync
End of
Pro le
Illustration 2.53 Change CAM immediately = 1.
No blending distance used. The blending is then done
automatically to the beginning of the new CAM. It does not
necessarily mean that this is in the next cycle (for example,
see Illustration 2.57).
Master absolute
Slave absolute
Non-Cyclic
blend
dist
0 1
Guide value
Change CAM imm=1
Use blend dist=1
Active
CAM 2
CAM
InSync
End of
pro le
CAM
Error
Illustration 2.54 The end of the blend distance is not on the
new CAM in the same guide value cycle.
This situation leads to a reject of the transition. An error is
issued because the 1 st CAM was aborted with Change CAM
imm = 1.
MG36D102
Programming Guide
Master absolute
Blending
Slave absolute
2
Guide value
cycle
cycle
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Blending
Master absolute
blend Slave absolute
dist
0 1
Guide value
Change CAM imm=1
Use blend dist=1
Active
CAM 2 CAM 3
CAM
InSync
End of
pro le
Illustration 2.55 Change CAM immediately = 1.
Use blending distance; Blending is possible to the new CAM
profile in the same cycle.
blend
dist
0 1
Change CAM imm=1
Use blend dist=1
Active
CAM 2 CAM 3
CAM
InSync
End of
pro le
Illustration 2.56 Change CAM immediately = 1.
Use blending distance; Blending distance ends after the new
CAM profile ends; Blending is then extended to the starting
point of the next cycle.
Master absolute
Slave absolute
Blending
blend
dist
0 1
Guide value
Change CAM imm=1
Use blend dist=1
Active
CAM 2 CAM 3
CAM
InSync
End of
pro le
Illustration 2.57 Use blending distance; Blending distance is
not long enough to reach the next CAM.
cycle
Master absolute
Slave absolute
Blending
Cyclic
2
Guide value
cycle
cycle
47
2 2