A-2
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Appendix A
Specifications
Stepper Performance
Trajectory update rate range .............................62.5 to 500 µs/sample
Maximum update rate ...............................62.5 µs/axis
4-axis update rate ......................................250 µs total
Multi-axis synchronization ...............................<1 update sample
Double-buffered trajectory parameters
Position range ...........................................±2
31
steps
Maximum relative move size....................±2
31
steps
Velocity range ...........................................1 to 4,000,000 steps/s
Acceleration/deceleration
1
........................244 to 512,000,000 counts/s
2
at a PID update
rate of 250 µs
S-Curve time range ...................................1 to 32,767 samples
Following error range ...............................0 to 32,767 counts
Gear ratio ..................................................±32,767:1 to ±1:32,767
Stepper outputs
Maximum pulse rate .................................4 MHz (full, half, and microstep)
Minimum pulse width ...............................120 ns at 4 MHz
Step output mode ......................................Step and direction or CW/CCW
Voltage range ............................................0 to 5 V
Output low voltage............................<0.6 V at 64 mA sink
Output high voltage ..........................Open collector with built-in 3.3 k
Ω
pull-up to
+5 V
Polarity......................................................Programmable, active-high or active-low
System Safety
Watchdog timer function...................................Resets board to startup state
Watchdog timeout .....................................63 ms
Shutdown input
Voltage range ............................................0 to 5 V
Input low voltage ..............................0.8 V
Input high voltage .............................2 V
Polarity..............................................Rising edge
Control ......................................................Disable all axes and command outputs
Motion I/O
Encoder inputs ..................................................Quadrature, incremental, single-ended
Maximum count rate .................................20 MHz
Minimum pulse width ...............................Programmable; depends on digital filter settings
1
Refer to the
NI-Motion Help
for more information.
Содержание PXI-7340
Страница 1: ...PXI 7342...
