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© National Instruments Corporation 1-1 NI 7340 User Manual
1
Introduction
This chapter includes information about the features of the PXI/PCI-7340
controller and information about operating the device.
About the 7340 Controller
The 7340 controller features advanced motion control with easy-to-use
software tools and add-on motion VI libraries for use with LabVIEW.
Features
The 7340 is a combination servo and stepper motor controller for PXI,
Compact PCI, and PCI bus computers. The 7340 provides fully
programmable motion control for up to four independent or coordinated
axes of motion, with dedicated motion I/O for limit and home switches and
additional I/O for general-purpose functions.
You can use the 7340 to perform arbitrary and complex motion trajectories
using stepper motors or servo devices.
Servo axes can control servo motors, servo hydraulics, servo valves, and
other servo devices. Servo axes always operate in closed-loop mode. These
axes use quadrature encoders or analog inputs for position and velocity
feedback and provide analog command outputs with an industry-standard
range of ±10 V.
Stepper axes can operate in open or closed-loop mode. In closed-loop
mode, they use quadrature encoders or analog inputs for position and
velocity feedback (closed-loop only), and provide step/direction or
clockwise (CW) /counter-clockwise (CCW) digital command outputs.
All stepper axes support full, half, and microstepping applications.
Hardware
The 7340 uses an advanced dual-processor architecture that uses a 32-bit
CPU, combined with a digital signal processor (DSP) and custom field
programmable gate arrays (FPGAs), making the controller a
high-performance device. The first-in-first-out (FIFO) bus interface and