National Instruments nuDrive 4SX-411, Руководство пользователя

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nuDrive Accessory User Guide 16 www.ni.com
Amplifier/Driver Command Signals
Servo Amplifier Signals
The servo amplifiers used in the servo versions of the nuDrive accept an
industry-standard ±10 V analog torque (current) command signal. Servo
motion controllers used with the nuDrive provide this standard output and
are programmed to close both the velocity loop and position loop using an
enhanced PID algorithm.
Stepper Driver Signals
For stepper drivers, there are two industry standards for command signals:
• Step and Direction signals (nuDrive standard)
• Independent CW and CCW pulses
The nuDrive uses stepper drivers that have active-low step and direction
inputs. You must configure the stepper outputs of your stepper controller
for Step and Direction signals with inverted (active-low) polarity. This
configuration is the National Instruments default output configuration for
stepper controller boards and nuDrives.
Optional Configurations
Warning Be sure to turn off the ENABLE switch and disconnect the main AC power as
well as the E-Stop 115 VAC input from the nuDrive before opening the nuDrive cover or
accessing any components within the nuDrive.
This section describes optional configurations for your nuDrive accessory.
The nuDrive is factory configured with default settings appropriate for
many applications. If required, you can modify the parameters and settings
on the individual axis drivers to meet your specific application
requirements.
E-Stop Terminal Block
The E-Stop option has a separate three-position removable screw terminal
block on the nuDrive back panel.
Note Your nuDrive is shipped with the E-Stop disabled. To enable the E-Stop, remove the
jumper from JP1 located on the interface board inside the nuDrive. JP1 is the single two-pin
header near the E-Stop 3 position terminal block.