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Specifications
Servo Performance
© National Instruments Corporation
This appendix lists the hardware and software performance specifications
for the 7344 controller.
PID update rate range............................. 62.5 to 500 µs/sample
Max PID update rate ....................... 62.5 µs/axis
4-axis PID update rate..................... 250 µs total
Trajectory update rate ............................ Same as PID update rate
Multi-axis synchronization .................... < 1 update sample
Position accuracy
Encoder feedback............................ ±1 quadrature count
Analog feedback ............................. ±1 LSB
Long-term velocity accuracy ................. Oscillator based, ±100 ppm
Double-buffered trajectory parameters
Absolute position range .................. ±2
Max relative move size ................... ±2
Velocity range................................. 1 to ±20,000,000 counts/s
RPM range ...................................... 10
Acceleration/deceleration ............... 4,000 to 128,000,000 counts/s
RPS/s range..................................... 10
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
A-1
A
31
counts
31
counts
–5
6
to 10
revolutions/minute
–1
8
2
to 10
revolutions/s
7344 Hardware User Manual
2
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