Emerson 2330MKII Section Maintenance and Repair General, Adjustment Instructions Acceleration

BOOK 0958-B

SECTION IV

MAINTENANCE AND REPAIR

GENERAL

1.Keep the controller dry and free of dust, dirt, and debris. No parts require periodic replacement.

2.Periodically turn-off the AC line supply to the controller and check all wire terminations to be sure they are tight.

3.Visually check components for damage due to overheating or breakage. All damaged and/or faulty components must be replaced for satisfactory operation.

4.Maintain the motor according to maintenance instructions supplied by the motor manufacturer.

ADJUSTMENT INSTRUCTIONS

ACCELERATION

1.Set the MOTOR SPEED potentiometer at 100% or the external speed reference signal at maximum, as applicable.

2.Initiate a Run command and observe the time required for the motor to reach maximum speed.

3.Adjust the ACCEL potentiometer for the desired rate. Full counter clockwise rotation is the fastest acceleration (0.1 second), and full clockwise rotation is the slowest acceleration (30 seconds).

DECELERATION

1.With the motor running at maximum speed, quickly reset the MOTOR SPEED potentiometer to zero, or quickly decrease the speed reference signal to minimum, as applicable, and observe the time required for the motor to reach minimum speed.

2.Adjust the DECEL potentiometer for the desired rate. Full counter clockwise rotation is the fastest deceleration (0.1 second), and full clockwise rotation is the slowest deceleration (30 seconds).

IR COMPENSATION

IR compensation is used only for armature feedback. The IR/COMP potentiometer is factory set at zero (full counterclockwise rotation) for satisfactory operation with most motors. If improved speed regulation is desired, readjust IR compensation as follows:

1.If the motor is shunt-wound, run it at rated base speed. If the motor is a permanent-magnet type, run it at about 1/3 speed.

2.Turn the IR/COMP potentiometer clockwise slowly until motor speed becomes unstable.

Then turn the potentiometer counterclockwise until motor speed stabilizes.

MAXIMUM SPEED

The MAX SPD potentiometer is factory set to provide 90 VDC armature voltage with a 115 VAC line, or 180 VDC armature voltage with a 230 VAC line.

To readjust maximum speed, run the motor at maximum speed and adjust the MAX SPD potentiometer for the desired maximum speed.

NOTE: If the MAX SPD potentiometer is turned too far counterclockwise, speed instability may occur.

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