Ndrive HL User’s Manual
Technical Details
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3.6. Voltage-to-Current Mode Operation
The firmware (version 2.06 and later) on the Ndrive HL supports a voltage-to-current
mode. This mode allows the unit to run in a standalone mode, attached to a master
position/velocity loop controller.
The standard operating mode of the Ndrive HL uses an OHCI IEEE-1394 connection
from a host PC running the Nmotion SMC (software motion controller) to control servos.
This connection is required for proper operation in this mode, since the fire wire
connection provides positioning and synchronization information to the drive.
Figure 3-12.
Normal Operation
The Voltage-to-Current mode of the Ndrive HL allows for a connection to a host
controller that outputs ±10V DC as a torque (current) command. In this mode, a
connection to the fire wire is not required (synchronization is performed internally),
except for parameter configuration.
Figure 3-13.
Stand-Alone Configuration
This mode allows the drive to be used in a general-purpose current-control mode with
older existing control hardware.
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