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Specifications
Servo Performance (7344 only)
© National Instruments Corporation
This appendix lists the hardware and software performance specifications
for the 7344/7334 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
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 (7344 only)..................... ±32,767:1 to 1:32,767
Servo control loop modes ...................... PID, PIVff, S-Curve, Dual Loop
PID (Kp, Ki and Kd) gains ............. 0 to 32,767
Integration limit (Ilim) .................... 0 to 32,767
Derivative sample period (Td) ........ 1 to 63 samples
31
31
–5
–1
A-1
A
counts
counts
6
to 10
revolutions/minute
8
2
to 10
revolutions/s
7344/7334 Hardware User Manual
2
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