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BOOK 0958-B
24
MINIMUM SPEED
1. Turn the MIN SPD potentiometer fully counterclockwise (0%) for zero speed.
2. Set the MOTOR SPEED potentiometer at 0% or the external speed reference signal at minimum, as applicable.
3. Initiate a Run command and adjust the MIN SPD potentiometer for the desired minimum speed (adjustable
from 0 to 40% of motor base speed).
CURRENT LIMIT
1. Turn the CUR LMT potentiometer fully clockwise (100%) to limit motor armature current at 150% of rated.
2. Turn the CUR LMT potentiometer counterclockwise to reduce maximum motor armature current.
NOTE:An external 5K ohm Current (Torque) Limit potentiometer can be used as shown in Figure 14 on page 14. Dip
switch SW3 position 3 must be in the OFF position if an external Current (Torque) Limit potentiometer is desired.
3. The GREEN power on LED indicator will change to RED whenever the controller is limiting (or regulating) current
to the motor.
TACHOMETER FEEDBACK SETUP
1. Before connecting or configuring tachometer feedback, follow the instructions to install and perform initial
startup, then run drive with maximum input speed reference and adjust the MAX SPEED potentiometer (R8b) for the
desired maximum motor speed. Note that for best performance, this should be within +/-20% of the motor nameplate
maximum speed or stability problems may occur.
2. Connect the tachometer wires to TB2:7 and 5 (polarity insensitive) and move the one piece jumper on J6, J7 and
J8 from the ARM position to the TACH position. (Figure 20 on page 37)
3. Select the tachometer voltage scaling at max speed by dip switch SW3:1 as follows:
TACH VOLTAGE SW3:1
8Vdc - 30Vdc ON
31Vdc - 175 Vdc OFF
4. Adjust the IR/TACH MAX SPEED potentiometer fully clockwise, this will provide minimum speed with tach
feedback.
5. Run the motor with maximum speed reference and start adjusting the IR/TACH MAX SPEED potentiometer
counterclockwise until motor speed increases to the desired maximum speed with tach feedback. Note that if the
tachometer signal is lost, the drive will automatically revert back to armature feedback.