Yaskawa MotionWorks IEC - Manual (Page 379)

PLCopenPlus Function Blocks for Motion Control 2013-04-13 371
Setting a larger window is not recommended. At extreme levels
approaching 50% of the cam master cycle or greater, the slave will seem
to casually engage at any master position, and exhibit a jump in position
when synchronizing with the master.
Cam Transitions Matrix
This chart describes the effect on various cam parameters and situations
when given conditions occur.
Green indicates the event has no effect, the prevailing value listed along
the top of the chart will be unaffected.
Yellow indicates that the event described at the left of the chart will impact
the parameter listed at the top in some way.
* The master/slave relationship is defined the first time a Y_CamIn,
Y_CamShift, Y_CamScale, or Y_SlaveOffset block executes, where first
time is defined as being in the Null state when any of these function blocks
execute. If a relationship is currently defined, then it is checked, and if
inconsistent with the initial definition, the block produces an error (4633,
Invalid master slave combination).
** Master/slave relationship is reset, i.e. the slave has no cam master.