Periodic Breakpoints (Ni 7350 Only); Periodic Breakpoint Algorithm - National Instruments NI-Motion User Manual

Periodic Breakpoints (NI 7350 only)

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Periodic breakpoints require that you specify an initial breakpoint and an
ongoing repeat period. When enabled, the periodic breakpoints begin when
the initial breakpoint occurs. From then on, a new breakpoint occurs each
time the axis moves a distance equal to the repeat period, with no
re-enabling required.
For example, if an axis is enabled at position zero, the initial breakpoint is
set for position 100, and the breakpoint period is set at 1,000, then the axis
behaves as shown in Figure 12-8.
–900
Figure 12-8. Periodic Breakpoint Every 1,000 Counts/Steps

Periodic Breakpoint Algorithm

Figure 12-9 shows the basic algorithm for periodic breakpoints.
Figure 12-9. Periodic Breakpoint Algorithm
12-17
100 1100 2100
= Current Position
= Breakpoint
= Armed Breakpoint
Configure breakpoint
Load breakpoint bosition
Load the initial breakpoint
Load breakpoint modulus
Load the breakpoint period
Enable breakpoint
Chapter 12 Synchronization
3100
Direction
NI-Motion User Manual