Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 577)

L-force | PLC Designer
General Editors

DMS 4.1 EN 03/2011 TD29 575
• SlaveAbsolute
The parameter CamTableSelect.SlaveAbsolute influences the StartMode of the
slave (primarily described by the parameter CamIn.StartMode ). The interaction of
both parameters results into a StartMode displayed in the table beyond:
CamIn.StartMode
CamTableSelect.SlaveAbsolute
absolute relative ramp_in ramp_in_pos ramp_in_neg
TRUE absolute relative ramp_in
absolute
ramp_in_pos
absolute ramp_in_neg absolute
FALSE relative relative ramp_in
relative
ramp_in_pos
relative ramp_in_neg relative
For a detailed description of the modes see MC_Camin.StartMode.
Module MC_CamIn
• MasterOffset, MasterScaling
These inputs transform the master position according to the following formula and
use the transformed position X for the evaluation of the CAM:
X = MasterScaling*MasterPosition + MasterOffset
Thus, if the value of MasterScaling is greater than 1, the CAM will be processed at a
higher speed rate, for a value less than 1 the speed rate will be lowered.
• SlaveOffset, SlaveScaling
These inputs shift resp. stretch the CAM in slave direction. The CAM will be
stretched first, afterwards it will be shifted according to the following formula:
Y = SlaveScaling*CAM( X ) + SlaveOffset
A SlaveScaling >1 effects a stretching of the CAM, thus the range of the slave will
increase; accordingly a SlaveScaling<1 effects a compression.
• StartMode: absolute / relative / ramp_in / ramp_in_pos / ramp_in_neg
The picture beyond demonstrates the effect of the option 'absolute' compared to
'relative' for an exemplary CAM. The CAM is defined on a master range that is
limited by the vertical axis at left and the dashed green plumb line at right. As we
are concerned with a periodic CAM, it will be processed again at master positions
exceeding the range.