Motion Control and Motor Drives

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How about repeat breakpoint in 7344?

Hi
   I want to trigger the external device every constant distance by the 7344's breakpoint.However in the 7344 only single-point breakpoint is supported.And if the re-enable function is execute by the host or on-board program,it will missing the breakpoint when the expected distance is too short or the speed is too high or even the program is not so deterministic.
  
  In my system I must sample the position and velocity data deterministicly,That means the on-board program may not so deterministic as
expected.
 
 I found 7344 can trigger the external device every encoder PHA ,PHB or the index signal via the RTSI,but I don't know if we can trigger every two ,three or move encoder period.And the RTSI can trigger devices except for the NI's?
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