Emerson 2330MKII manual Minimum Speed, Current Limit, Tachometer Feedback Setup

Page 32

BOOK 0958-B

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.

24

Page 31 Page 33
Image 32
Page 31 Page 33
Contents Book 0958-B Page 3 HP Book 0958-B Table of Contents List of Tables List of IllustrationsBlank Following must be strictly adhered to at all times Model Types Section General Information IntroductionGeneral Description Motor Selection Section Installation Installation GuidelinesDo not use solid wire Installing the Controller Jumper J4 Position Motor Armature Current Rating AmperesInstall the controller cover, if used Controller Mounting Configurations Controller Mounting Dimensions Logic connection diagram, Run-Stop-Jog Switch Book 0958-B Book 0958-B Book 0958-B Signal Connection Diagram, Motor Speed Potentiometer Signal Connection Diagram, Tachometer Feedback Signal Connection Diagram, 4-20mA Interface Page Initial Potentiometer Settings Description Initial StartupBook 0958-B Stop Section Operation Power ON/OFFRUN JOG Speed ControlTorque Control Reverse Load Monitor Current Loop Transducers Inoperative MotorBlank Section Maintenance and Repair General Adjustment Instructions AccelerationDeceleration IR CompensationCurrent Limit Tachometer Feedback SetupMinimum Speed Troubleshooting Indication Possible Cause Corrective ActionOne or more SCR‘s or Diode D1b Troubleshooting Indication Possible Cause Corrective ActionTroubleshooting Indication Part Section Parts ListParts LIST, Series 2330 Mkii Controllers Fincor Part Blank Section Ratings and Specifications 120%Operating Voltages and Signals Controller WeightsPerformance Characteristics Operating ConditionsShunt Field Data AdjustmentsSpecifications Tachometer Feedback Voltage Selection Section Drawings Functional Schematic, Series 2330MKII Series 2330MKII Control Board, 1/6 3HP Blank Index Maximum Speed Book 0958-B
Top Page Image Contents