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Pulse Mode
In the Pulse mode, the Positioning Drive responds to a serial pulse train representing externally
generated incremental position change commands. This mode is commonly used to control DC
stepper motors or numeric controlled (CNC) machinery. The PULSE/PULSE or
PULSE/DIRECTION operation are provided so that pulse inputs are converted to velocity and
distance. The drive can be programmed to allow for pulses per revolution of 200 to 25,000.
Once programmed, the total pulses received is converted to the equivalent distance in steps or
pulses per revolution and the rate that pulses are received determines velocity. The base number
system that the drive uses is binary with a resolution of 4096 per revolution. When using the
pulse modes, there is no accumulative error. However, the positional accuracy is based on the
lower of
±
1 part in 4096 or
±
1 of the programming resolution. At very low programming
resolution such as 200 pulses per revolution, a dither of 360
°
/200 or 1.8
°
is typical. The
maximum pulse rate input cannot exceed 204,800 Hz.
Figure 45
Pulse Mode
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