Rockwell Automation DC3R Regenerative DC Drive User Guide 1/4 - 2 HP, 115/230 VAC - Manual (Page 45)

37 Application Notes
Independent forward and reverse speeds
Figure 21. Independent Forward and Reverse Speeds
ATTENTION: At very low input levels, noise or drift could cause
analog input polarity to change. This could cause the motor to rotate in
the opposite direction. Proper precautions should be taken as this could
result in damage to, or destruction of, the equipment.
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Connect two speed adjust potentiometers as shown in
Figure 21 to select between independent forward and reverse speeds.