National Instruments 7340 PCI Benutzerhandbuch

© National Instruments Corporation

This chapter provides an overview of motion control algorithms and the 
PXI/PCI-7340 controller.

With the 7340, you can perform up to four axes of simultaneous, 
coordinated motion control in a preemptive, multitasking, real-time 
environment.

An advanced dual-processor architecture that uses a 32-bit CPU combined 
with a digital signal processor (DSP) and custom FPGAs give the 7340 
high-performance capabilities. The FIFO bus interface and powerful 
function set provide high-speed communications while off-loading 
complex motion functions from the host PC for optimized system 
performance.

The 7340 uses the DSP for all closed-loop control, including position 
tracking, PID control closed-loop computation, and motion trajectory 
generation. The DSP chip is supported by custom FPGAs that perform the 
high-speed encoder interfacing, position capture and breakpoint functions, 
motion I/O processing, and stepper pulse generation for hard real-time 
functionality.

The embedded, multitasking real-time CPU handles host communications, 
command processing, multi-axis interpolation, onboard program 
execution, error handling, general-purpose digital I/O, and overall motion 
system integration functions.