Rockwell Automation DC3RD User Manual

DC3RD Digital Regenerative DC Drive User Guide 1/4 to 2 HP, 115/230 VAC

Instruction Manual D2-3455

Important: Identifies information that is critical for successful application and understanding of the product.

ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss.

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ATTENTION: Only qualified personnel familiar with the construction and operation of this equipment and the hazards involved should install, adjust, operate, and/or service this equipment. Read and understand this instruction manual in its entirety before proceeding. Failure to observe this precaution could result in severe bodily injury or loss of life.

ATTENTION: The user is responsible for conforming with all applicable local and national codes. Failure to observe this precaution could result in severe bodily injury or loss of life.

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The information in this manual is subject to change without notice.

Throughout this manual, the following notes are used to alert you to safety considerations:

Trademarks not belonging to Rockwell Automation are property of their respective companies.

ATTENTION: This drive is isolated from earth ground. Circuit potentials are at 115VAC or 230VAC above earth ground. Avoid direct contact with the printed circuit board or with circuit elements to avoid the risk of serious injury or fatality. Use a non-metallic screwdriver when adjusting the calibration trimpots.

ATTENTION: It is possible for a drive to run at full speed as a result of a component failure. Please ensure that a master switch has been placed in the AC line to stop the drive in an emergency.

ATTENTION: Reduce the chance of an electrical fire, shock, or explosion by proper grounding, over-current protection, thermal protection and enclosure. Follow sound maintenance procedures.

ATTENTION: This Drive contains ESD (Electric Static Discharge) sensitive parts and assemblies. Static control precautions are required when installing, testing, servicing, or repairing this assembly. Failure to observe these precautions could result in damage to, or destruction of, the equipment.

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Specifications 1 Dimensions 5 Installation 6

Mounting . ............................................7

Wiring . . . ............................................8

Shielding guidelines .................................9

Heat sinking .........................................10

Line fusing ...........................................10

Cage-clamp terminals ..................................12

Connections ..........................................13

Field output ..........................................15

Limit switch connections (optional) ........................16

Remote pushbuttons (optional) ...........................16

Slide switches ........................................17

Mode select switches ..................................19

Operating modes . ...................................20

Operation 21

Before applying power .................................22

Startup .............................................22

Jogging the motor ...................................23

Limit switch operating modes ............................24

Mode 1 – Half cycle between forward and reverse limit switches 24 Mode 2 – Single cycle between forward and

reverse limit switches .............................25

Mode 3 – Continuous cycle between forward and

reverse limit switches .............................26

Mode 4 – Single cycle with one limit switch ................27

Contents

Calibration 28

Power board trimpots ..................................29

MINSPD ..........................................29

MAXSPD .........................................29

FWDACC .........................................30

REVACC .........................................30

IRCOMP .........................................31

FWDTQ ..........................................32

REVTQ ...........................................33

DB 34

TACH (for use with tachogenerator feedback only) ...........36

Logic board trimpots ...................................38

FWDJOG .........................................38

REVJOG .........................................38

DWELL TIME . . ....................................39

Troubleshooting 41

Before applying power: .................................42

Block Diagram ........................................48

Prewired Connections ..................................49

Regenerative Drives 51 CE Compliance 53

AC Line Filters .......................................54

Armature Filters . . ....................................55

iiiContents

Figure 1. DC3RD Dimensions ...........................5

Figure 2. Cage-Clamp Terminal .........................12

Figure 3. Connections ................................14

Figure 4. Optional limit switch connections .................16

Figure 5. Optional remote pushbutton connections ...........16

Figure 6. Slide Switch Locations ........................18

Figure 7. Mode Select Switches .........................19

Figure 8. Recommended FWD TQ, REV TQ

and IR COMP Settings for DC3RD ...............40

Figure 9. Deadband Settings ...........................40

Figure 10. DC3RD Block Diagram ........................48

Figure 11. Prewired Connections to L1, L2 (115) and L2 (230) . . .49 Figure 12. Touch Panel, Logic Board and

Power Board Connections ......................50

Figure 13. Four Quadrant Operation ......................52

Illustrations

Table 1. Recommended Line Fuse Sizes .................11

Table 2. Field Output Connections ......................15

Table 3. AC Line Filters ..............................54

Table 4. Armature Filters .............................55

Tables

Max. Armature HP Range HP Range Current with 115 VAC with 230 VAC

Model (Amps DC) Applied Applied DC3R-12D-4X-010-DN 10.0 1/4–1 1/2–2

AC Line Voltage 115/230 VAC, ±10%, 50/60 Hz, single phase Maximum Allowable Symmetrical AC Line Current 5000 amps Maximum Line Distribution kVA

115 VAC Input 25 kVA 230 VAC Input 50 kVA

Motor Armature Voltage

115 VAC Input 0–90 VDC

230 VAC Input 0–180 VDC Form Factor 1.37 at base speed Field Voltage

115 VAC Input 50 VDC (F1 to L1); 100 VDC (F1 to F2)

230 VAC Input 100 VDC (F1 to L1); 200 VDC (F1 to F2) Maximum Field Current 1 ADC Acceleration Time Range (with no load) 0.5–15 seconds Deceleration Time Range (with no load) 0.5–15 seconds Analog Input Voltage Range (isolated; RB1 to S2) –10 to +10 VDC Input Impedance (RB1 to S2) 32K ohms

Specifications

Load Regulation

with Armature Feedback 1% of base speed or better

with Tachogenerator Feedback 0.1% of base speed Dwell Time 0.1 – 1 second (0.1 second increments) Environmental Conditions Vibration 0.5G max. (0–50 Hz)

0.1G max. (>50 Hz)

Ambient Temperature Range 10°C–40°C Weight 8.3 lb

Safety Certification UL Listed Component

cUL Listed Component

CE Approved Component

2 Specifications

Drive Rating

Motor HP Rated AC Input DC Armature DC Armature Field Field

Line Amps kVA Voltage Current Voltage Current

1/4 4.2 0.48 90 2.7 50 1

4.2 0.97 180 2.7 100 1

1/3 5.5 0.63 90 3.5 50 1

5.5 1.27 180 3.5 100 1

1/2 7.5 0.86 90 5 50 1

3.8 0.87 180 2.5 100 1

3.8 0.87 180 2.5 200 1

3/4 10.9 1.25 90 7.6 50 1

5.9 1.36 180 3.8 100 1

5.1 1.17 180 3.8 200 1

1 12.1 1.39 90 10 50 1

6.7 1.54 180 5 100 1

6.7 1.54 180 5 200 1

1 1/2 -- -- -- -- -- --

9.8 1.25 180 7 100 1

9.8 2.25 180 7 200 1

2 ---- -- -- ----

11.7 2.69 180 9.2 100 1

11.7 2.69 180 9.2 200 1

3Specifications

Dimensions

Figure 1. DC3RD Dimensions

Installation

ATTENTION: Only qualified technical personnel,

familiar with the construction and operation of this equipment and the hazards involved, should install, adjust, operate and/or service this equipment. Read and understand this instruction manual in its entirety before proceeding. Failure to observe this precaution could result in severe bodily injury or loss of life.

ATTENTION: This equipment is at line voltage when AC power is connected. Disconnect and lockout all ungrounded conductors of the AC power line before working on the unit. Failure to observe this precaution could result in severe bodily injury or loss of life.

ATTENTION: The user is responsible for conforming with all applicable local and national codes. Failure to observe this precaution could result in severe bodily injury or loss of life.

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Mounting

NEMA 4X enclosed drives come with three 0.88 inch (22 mm) conduit knockout holes at the bottom of the case. The units may be vertically wall mounted using the four 0.25 inch (6 mm) slotted holes on the attached heat sink. For motor loads less than 5 ADC, the drive may be bench mounted horizontally, or operated without mounting.

1. Install the mounting screws.

2. For access to the terminal strip, turn the slotted screw on the front cover counterclockwise until it is free from the case. The right side of the cover is hinged to the case. Lift or pull the slotted screw to open the case.

3. Carefully remove the conduit knockouts by tapping them into the case and twisting them off with pliers.

4. Install conduit hardware through the 0.88 inch (22 mm) conduit holes. Connect external wiring to the terminal block.

5. Grasp the slotted screw and tilt the front cover back into place. Avoid pinching any wires between the front cover and the case.

6. Turn the slotted screw clockwise until tight to secure the front cover.

7. Set the POWER switch to the OFF position before applying the AC line voltage.

7Installation

8 Installation

Wiring

ATTENTION: This drive is isolated from earth

ground. Circuit potentials are at 115 or 230 VAC above ground. To prevent the risk of injury or fatality, avoid direct contact with the printed circuit board or with circuit elements. Use a non-metallic screwdriver for the calibration trimpots.

ATTENTION: Do not disconnect any of the motor leads from the drive unless power is removed or the drive is disabled. Opening any one motor lead may destroy the drive.

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Use 18-24 AWG wire for speed adjust potentiometer wiring. Use 14–16 AWG wire for AC line (L1, L2) and motor (A1 and A2) wiring.

Shielding guidelines

9Installation

As a general rule, Reliance Electric recommends shielding of all conductors if:

• wire lengths exceed 4 inches and power and logic leads

must be bundled together*; or

• radiated and/or conducted noise must be minimized due

to concerns about immunity or general compliance (CE, FCC, etc.)

* Reliance Electric considers this an unfavorable condition and does not recommend bundling power and logic leads for any length.

ATTENTION: If it is not practical to shield power conductors, Reliance Electric recommends shielding all logic-level leads. If shielding is not practical, use twisted-pair control wiring to minimize induced noise.

ATTENTION: Under no circumstances should power and logic leads be bundled together. Induced voltage can cause unpredictable behavior any electronic device, including motor controls.

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The DC3RD drive has line fuses mounted on fuse holders 501 and 502 (FU501 and FU502). When replacing the line fuses, use fast acting fuses rated for 250 VAC or higher, and at least 200% of the armature current. See Table 1 for recommended line fuse sizes.

10 Installation

It may be necessary to earth ground the shielded cable. If noise is produced by devices other than the drive, ground the shield at the drive end. If noise is generated by a device on the drive, ground the shield at the end away from the drive. Do not ground both ends of the shield.

If the drive continues to pick up noise after grounding the shield, it may be necessary to add AC line filtering devices, or to mount the drive in a less noisy environment.

Heat sinking

The DC3RD contains sufficient heat sinking in its basic configuration. No additional heat sinking is necessary.

Line fusing

ATTENTION: Most code requires that upstream

branch protection be provided to protect input power wiring. Failure to observe this precaution could result in severe bodily injury or loss of life.

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11Installation

Table 1. Recommended Line Fuse Sizes

90 VDC Motor 180 VDC Motor Max. DC Armature AC Line Fuse

Horsepower Horsepower Current (amps) Size (amps)

1/20 1/10 0.5 3 1/15 1/8 0.8 3

1/8 1/4 1.5 5 1/6 1/3 1.7 5 1/4 1/2 2.6 8 1/3 3/4 3.5 8 1/2 1 5.0 10 3/4 1 1/2 7.6 15

1 2 10 20

12 Installation

Cage-clamp terminals

DC3RD Series drive connections are made to cage-clamp terminals. To insert a wire into a terminal, see Figure 2.

1. Press down on the lever arm using a small screwdriver.

2. Insert wire into the wire clamp.

3. Release the lever arm to clamp wire.

Figure 2. Cage-Clamp Terminal

13Installation

ATTENTION: Do not connect this equipment with power applied. Failure to heed this directive may result in fire or serious injury.

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Connections

Connect the power input leads and a DC motor to the drive’s terminal board as shown in Figure 3, page 14. Ensure that the motor voltage rating is consistent with the drive’s output voltage.

DC3RD drives supply motor voltage from A1 and A2 terminals. It is assumed throughout this manual that, when A1 is positive with respect to A2 , the motor will rotate clockwise (CW) while looking at the output shaft protruding from the front of the motor. If this is opposite of the desired rotation, simply reverse the wiring of A1 and A2 with each other.

14 Installation

NOTE: TERMINAL 1 IS HOT. TERMINALS 2 AND 3 ARE NEUTRAL.

Figure 3. Connections

15Installation

Field output

The field output is for shunt wound motors only. Do not make any connections to the field output when using a permanent magnet motor. See Table 2 for field output connections.

Table 2. Field Output Connections

Line Voltage Approximate Field Field

(VAC) Voltage (VDC) Connections

115 50 F1 and L1 115 100 F1 and F2 230 100 F1 and L1 230 200 F1 and F2

16 Installation

Limit switch connections (optional)

All connections to the logic board are prewired (see prewired connections on page 49). If your application requires the use of limit switches, connect the limit switches to the logic board as shown in Figure 4. If only the forward limit switch is used, remove the reverse limit switch and jumper terminal 21 to

22. If only the reverse limit switch is used, remove the forward limit switch and jumper terminal 20 to 22.

Remote pushbuttons (optional)

Add external jog, stop, reverse and forward pushbuttons to control the drive from a remote location. Connect normally open pushbuttons to top board terminals 15 through 19 (see Figure 5). Case pushbuttons may still be used if external pushbuttons are connected.

Figure 4. Optional limit switch

connections

Figure 5. Optional remote

pushbutton connections

17Installation

Slide switches

ATTENTION: Change voltage switch settings only

when the drive is disconnected from AC line voltage. Make sure both switches are set to their correct position. If the switches are improperly set to a lower voltage position, the motor will not run at full voltage and may cause damage to the transformer. If the switches are improperly set to a higher voltage position, the motor will overspeed, which may cause motor damage, or result in bodily injury or loss of life.

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18 Installation

Feedback Switch

Set to ARM for armature feedback,

or TACH for tachogenerator

feedback.

Armature Voltage Switch

Set to 90 for 90 VDC motor,

or 180 for 180 VDC motor.

Line Voltage Switches

Set to 115 for 115 VAC line voltage, or

230 for 230 VAC line voltage.

Figure 6. Slide Switch Locations

19Installation

Mode select switches

Mode select switches, located on the logic board (see Figure 7), are preset with switch 1 OFF and switch 2 ON. This allows you to operate the drive without the use of limit switches. Change mode select switch settings when power is off. Make sure that terminals 20, 21, and 22 are jumpered if limit switches are not used. If limit switches are used, set the mode select switches to one of the four operating modes:

Figure 7. Mode Select Switches

Mode Select Switches

20 Installation

Mode 1 (1 and 2 OFF) – Half cycle between forward and reverse limit switches.

Mode 2 (1 ON and 2 OFF) – Single cycle between forward and reverse limit switches.

Mode 3 (1 OFF and 2 ON) – Continuous cycle between forward and reverse limit switches.

Mode 4 (1 and 2 ON) – Single cycle with one limit switch.

See page 24 for more information on limit switch operating modes.

Operating modes

Operation

ATTENTION: Only qualified technical personnel,

ATTENTION: All adjustments to these components should be made with power removed. Failure to observe this precaution could result in severe bodily injury or loss of life.

ATTENTION: Change voltage switch settings only when the drive is disconnected from AC line voltage. Make sure both switches are set to their correct position. If the switches are improperly set to a lower voltage position, the motor will not run at full voltage and may cause damage to the transformer. If the switches are improperly set to a higher voltage position, the motor will overspeed, which may cause motor damage, or result in bodily injury or loss of life.

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Before applying power

• Verify that no conductive material is present on the printed circuit board.

• Set all switches to their proper settings.

• Verify that the AC supply is properly balanced.

Startup

1. Set the power switch to OFF; set forward and reverse

speed adjust potentiometers to 0; set FWD JOG and REV JOG trimpots to 50% (12 o’clock).

2. Apply AC line voltage.

3. Set the power switch to ON. The LED above STOP is

lit.

3. To rotate the motor in the forward direction:

a. Press FWD. The LED above it lights. b. Set the forward speed adjust potentiometer until the

motor rotates at the desired forward speed.

To rotate the motor in the reverse direction:

a. Press REV. The LED above it lights. b. Set the reverse speed adjust potentiometer until the

motor rotates at the desired reverse speed.

5. To switch the direction of motor rotation, press the

pushbutton of the opposite direction.

6. Press STOP to stop the motor.

22 Operation

Jogging the motor

The DC3RD digital drive has a jog option, allowing you to jog the motor in the forward or reverse direction as long as the forward or reverse pushbutton is pressed. The drive can be switched to the jog mode while the motor is stopped, or is running in either the forward or reverse direction. To jog the motor:

1. Press JOG to enter the jog mode.

2. To jog the motor in the forward direction:

a. Press and hold the FWD pushbutton. The motor

jogs in the forward direction. The motor speed is set by the FWD JOG trimpot.

b. Release FWD to stop the motor.

To jog the motor in the reverse direction:

a. Press and hold the REV pushbutton. The motor jogs

in the reverse direction. The motor speed is set by the REV JOG trimpot.

b. Release REV to stop the motor.

3. To exit the jog mode, press STOP.

23Operation

24 Operation

Limit switch operating modes

The following is a description of the four limit switch operating modes.

Mode 1 – Half cycle between forward and reverse

limit switches

1. Press the forward pushbutton for forward motor rotation.

2. Motor rotates in the forward direction until the forward limit switch opens.

3. The motor stops when the forward limit switch opens.

4. Press the reverse pushbutton for reverse motor rotation

5. Motor rotates in the reverse direction until the reverse limit switch opens.

6. The motor stops when the reverse limit switch opens. Return to step 1 to repeat the process

Press FWD to go forward.

Reverse

Limit

Switch

Forward

Limit

Switch

Forward Direction

Reverse Direction

STOP

Press REV to go reverse.

25Operation

1. Press the forward pushbutton for forward motor rotation.

2. Motor rotates in the forward direction until the forward limit switch opens.

3. The motor stops and dwells when the

forward limit switch opens. Set the dwell time by calibrating the DWELL TIME trimpot (see page 23).

4. Motor rotates in the reverse

direction until the reverse limit switch opens.

5. The motor stops when the reverse

limit switch opens. Return to step 1 to repeat the process.

Press FWD to go forward.

Reverse

Limit

Switch

Forward

Limit

Switch

Forward Direction

Reverse Direction

STOP

AND

DWELL

STOP

Mode 2 – Single cycle between forward and reverse limit switches

• Single cycle automatically returns travel to the reverse limit switch location.

26 Operation

Mode 3 – Continuous cycle between forward and reverse limit switches

1. Press the forward pushbutton for forward motor rotation.

2. Motor rotates in the forward direction until the forward limit switch opens.

3. The motor stops and dwells when the forward limit switch opens. Set the dwell time by calibrating the DWELL TIME trimpot (see page

23).

4. Motor rotates in the reverse direction until the reverse limit switch opens.

5. The motor stops and dwells when the reverse limit switch opens. The process repeats steps 2-5 until you press the STOP pushbutton.

Reverse

Limit

Switch

Forward

Limit

Switch

Forward Direction

Reverse Direction

STOP

AND

DWELL

STOP

AND

DWELL

Press FWD to go forward.

27Operation

1. Press the forward pushbutton for forward motor rotation.

Press the reverse pushbutton for reverse motor rotation.

2. Motor rotates until the limit switch opens.

3. The motor stops when the limit switch is open. Return to step 1 to restart the motor.

Limit Switch

STOP

Press FWD to go forward.

Press REV to go reverse.

Mode4–Singlecycle with one limit switch

IMPORTANT: For all operating modes, press the STOP

pushbutton to stop a rotating motor before a limit switch is activated. Resume operation by pressing the FORWARD or REVERSE pushbuttons.

Calibration

ATTENTION: Dangerous voltages exist on the drive

when it is powered, and up to 30 seconds after power is removed and the motor stops. When possible, disconnect the voltage input from the drive before adjusting the trimpots. If the trimpots must be adjusted with power applied, use insulated tools and the appropriate personal protection equipment. BE ALERT. High voltages can cause serious or fatal injury.

ATTENTION: The control circuit is at line potential when the drive is energized. Use a non-metallic screwdriver when making adjustments to the circuit board potentiometers. Exercise extreme caution as hazardous voltage exists. Failure to observe these precautions could result in severe bodily injury or loss of life.

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Power board trimpots

MIN SPD

MIN SPD may be calibrated if the CCW side of the speed adjust potentiometer is connected to S0 (S0 is in series with the MIN SPD trimpot). Since the forward and reverse speed adjust potentiometers are not connected to S0, MIN SPD cannot be calibrated.

MAX SPD

The MAX SPD trimpot setting determines the motor speed when the forward (or reverse) speed adjust potentiometer is turned full CW. It is factory set for maximum rated speed.

To calibrate MAX SPD:

1. Set the MAX SPD trimpot full CCW.

2. Press FWD (or REV).

3. Turn the forward (or reverse) speed adjust potentiometer full CW.

4. Adjust the MAX SPD trimpot until the desired maximum motor speed is reached.

The calibrated maximum speed is the same for both forward and reverse directions.

29Calibration

FWD ACC

The FWD ACC trimpot setting determines the time the motor takes to ramp to either a higher speed in the forward direction or a lower speed in the reverse direction, within the limits of available torque. FWD ACC is factory set for its fastest forward acceleration time.

Turn the FWD ACC trimpot CW to increase the forward acceleration time and reverse deceleration time, and CCW to decrease the forward acceleration time and reverse deceleration time.

REV ACC

The REV ACC trimpot setting determines the time the motor takes to ramp to either a higher speed in the reverse direction or a lower speed in the forward direction, within the limits of available torque. REV ACC is factory set for its fastest reverse acceleration time.

Turn the REV ACC trimpot CW to increase the reverse acceleration time and forward deceleration time, and CCW to decrease the reverse acceleration time and forward deceleration time.

30 Calibration

IR COMP

The IR COMP trimpot setting determines the degree to which motor speed is held constant as the motor load changes. It is factory set for optimum motor regulation. See Figure 8, page 40, for recommended IR COMP trimpot settings.

To calibrate IR COMP (exact calibration):

1. With the motor rotating in the forward direction, set the forward speed adjust potentiometer until the motor runs at midspeed (for example, 900 RPM for an 1800 RPM motor).

2. Load the motor armature to its full load armature current rating. The motor should slow down.

3. While keeping the load on the motor, rotate the IR COMP trimpot until the motor runs at the speed measured in step 1.

Approximate calibration:

If the motor does not maintain set speed as the load changes, gradually rotate the IR COMP trimpot CW. If the motor oscillates (overcompensation), the IR COMP trimpot may be set too high (CW). Turn the IR COMP trimpot CCW to stabilize the motor speed.

31Calibration

32 Calibration

FWD TQ

ATTENTION: Although the FWD TQ trimpot is set to

120% of motor nameplate current rating, continuous operation beyond that rating may damage the motor.

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The FWD TQ setting determines the maximum torque for accelerating and driving the motor in the forward direction. It also sets the maximum torque for decelerating the motor from the reverse direction. FWD TQ is factory set at 120% of rated motor current.

To recalibrate FWD TQ, refer to the recommended FWD TQ settings on Figure 8, page 40, or recalibrate using the following procedure:

1. With the power disconnected from the drive, connect a DC ammeter in series with the armature.

2. Set the FWD TQ trimpot to minimum (full CCW).

3. Lock the motor armature. Be sure that the motor is

firmly mounted.

4. Connect power to the drive. The motor should remain

stopped.

5. Press FWD .

6. Set the forward speed adjust potentiometer for maximum forward speed.

7. Adjust the FWD TQ trimpot CW until the armature current is 120% of motor rated current.

8. Set the forward speed adjust potentiometer to minimum and remove the stall from the motor.

33Calibration

REV TQ

ATTENTION: Although the REV TQ trimpot is set to

120% of motor nameplate current rating, continuous operation beyond that rating may damage the motor.

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The REV TQ trimpot setting determines the maximum torque for accelerating and driving the motor in the reverse direction. It also sets the maximum torque for decelerating the motor from the forward direction. REV TQ is factory set at 120% of rated motor current.

To recalibrate REV TQ, refer to the recommended REV TQ settings on Figure 8, page 40, or recalibrate using the following procedure:

1. With the power disconnected from the drive, connect a DC ammeter in series with the armature.

34 Calibration

ATTENTION: Do not turn DB past the 60 HZ setting. This could cause shoot through, which may blow fuses and cause the drive to fail.

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The deadband trimpot setting determines the time that will elapse between the application of current in one direction before current is applied in the opposite direction. It also affects the resistance that a motor has to changes in shaft position at zero speed by applying AC voltage to the motor armature.

2. Set the REV TQ trimpot to minimum (full CCW).

3. Lock the motor armature. Be sure that the motor is

firmly mounted.

4. Connect power to the drive. The motor should remain

stopped.

5. Press REV .

5. Set the reverse speed adjust potentiometer for maximum reverse speed.

6. Adjust the REV TQ trimpot CW until the armature current is 120% of motor rated current.

7. Set the reverse speed adjust potentiometer to minimum and remove the stall from the motor.

Deadband is factory calibrated to approximately the 3 o’clock position for 60 Hz AC line operation. Recalibrate the deadband to the 9 o’clock position for 50 Hz AC line operation. If you hear motor noise (a humming or buzzing sound), the deadband might be set too high. Turn the deadband trimpot CCW until the motor noise ceases. See Figure 9, page 40, for recommended deadband settings.

35Calibration

36 Calibration

IMPORTANT: Calibrate the TACH trimpot setting only when a tachogenerator is used.

The TACH setting, like the IR COMP setting, determines the degree to which motor speed is held constant as the motor load changes.

TACH (for use with tachogenerator feedback only)

ATTENTION: Applying the incorrect polarity to the

tachogenerator can cause an overspeed condition. Make sure the positive (+) wire is connected to terminal T1 and the negative (-) wire is connect to terminal T2 when the motor is running in the forward direction. Failure to observe this precaution could result in bodily injury.

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To calibrate the TACH:

1. Connect the tachogenerator to T1 and T2. The polarity is

“+” for T1 and “–” for T2 when the motor is running in the forward direction.

2. Set switch 504 (SW504) to ARM for armature feedback.

3. Set the power switch to ON.

4. Press FWD .

3. Set the forward speed adjust potentiometer full CW.

Measure the armature voltage across A1 and A2 using a voltmeter.

4. Set the speed adjust potentiometer to 0 (zero speed).

5. Set SW504 to TACH for tachogenerator feedback.

6. Set the IR COMP trimpot full CCW.

7. Set the TACH trimpot full CW.

8. Set the speed adjust potentiometer full CW.

9. Adjust the TACH trimpot until the armature voltage is

the same value as the voltage measured in step 3.

Check that the tachogenerator is properly calibrated. The motor should run at the same set speed when SW504 is set to either armature or tachogenerator feedback.

37Calibration

Logic board trimpots

FWD JOG

The FWD JOG trimpot setting determines the motor speed when it rotates in the forward direction in the jog mode. To calibrate FWD JOG:

1. Press JOG .

2. Press and hold the FWD pushbutton. The motor jogs in the forward direction.

3. Adjust the FWD JOG trimpot until the motor rotates at the desired forward jog speed.

4. Release FWD to stop the motor.

REV JOG

The REV JOG trimpot setting determines the motor speed when it rotates in the reverse direction in the jog mode. To calibrate REV JOG:

1. Press JOG .

2. Press and hold the REV pushbutton. The motor jogs in the reverse direction.

3. Adjust the REV JOG trimpot until the motor rotates at the desired reverse jog speed.

4. Release REV to stop the motor.

38 Calibration

DWELL TIME

The DWELL TIME trimpot setting determines the length of time the motor stops before rotating in the opposite direction. DWELL TIME only works when the drive is set for Mode 2 and Mode 3 (see page 24 for limit switch operating modes).

There are 10 DWELL TIME settings (0 thru 9). Set the DWELL TIME to 0 (the factory setting) for 0.1 second delay. Increasing the setting one increment higher adds 0.1 second to the dwell time. Set the DWELL TIME trimpot to 9 for approximately 1 second delay.

39Calibration

40 Calibration

Figure 8. Recommended FWD TQ, REV TQ,

and IR COMP Settings for DC3RD

(actual settings may vary with each application)

Figure 9. Deadband Settings

Troubleshooting

ATTENTION: This equipment is at line voltage when

AC power is connected. Disconnect and lockout all ungrounded conductors of the AC power line before working on the unit. Failure to observe this precaution could result in severe bodily injury or loss of life.



Before applying power:

Check the following steps before proceeding:

1. The AC line voltage must be balanced, and match the voltage on the drive nameplate.

2. Check that all switches are set to the correct positions.

3. The deadband (DB) trimpot must be set approximately at the 3 o’clock position for 60 Hz AC line frequency or at 9 o’clock for 50 Hz AC line frequency.

4. The motor must be rated for the drive’s rated armature (all motors) and field outputs (shunt wound motors only).

5. Do not make any connections to F1 and F2 if using a permanent magnet motor.

6. Terminal block connections should be consistent with the connections shown in this manual.

7. Check that line fuses FU501 and FU502 are properly sized and not blown.

42 Troubleshooting

43Troubleshooting

Problem Possible

Causes

Suggested

Solutions

Line fuse blows 1. Line fuses are the

wrong size.

2. Motor cable or armature is shorted to ground.

3. Nuisance tripping caused by a combination of ambient conditions and high-current spikes (i.e. reversing).

4. Field circuit is open.

1. Check that line fuses are properly sized.

2. Check motor cable and armature for shorts.

3. Add a blower to cool the drive components; decrease FWD TQ and REV TQ settings; check wiring to be sure noise is reduced or eliminated.

4. Send in drive to Reliance Electric repair department.

44 Troubleshooting

Problem Possible

Causes

Suggested

Solutions

Line fuse does not blow, but the motor does not run when the forward or reverse pushbutton is pressed

1. Forward or reverse speed adjust potentiometer is set to zero speed.

2. Forward or reverse speed adjust potentiometer is not connected to drive input properly; connections are open.

3. Middle and right INH-RUN terminals are not jumpered.

4. INHIBIT terminals are jumpered.

5. S2 is shorted to S0.

6. Drive is in current limit.

1. Increase the forward or reverse speed adjust potentiometer setting

2. Check connections to input. Verify that connections are not open.

3. Jumper middle and right INH-RUN terminals.

4. Remove jumper from INHIBIT terminal.

5. Remove short.

6. Verify if motor is jammed. Increase FWD TQ or REV TQ setting if they are set too low.

45Troubleshooting

Problem Possible

Causes

Suggested

Solutions

Line fuse does not blow, but the motor does not run when the forward or reverse pushbutton is pressed (cont.)

Motor runs too slow or too fast

7. Drive is not receiving AC line voltage.

8. Motor is not connected.

9. Touch panel, logic board, or power board connections might be loose.

1. Switches set incorrectly.

2. MAX SPD is not calibrated.

3. Motor field not properly connected (shunt wound motors only)

7. Apply AC line voltage to L1 and L2.

8. Connect motor to A1 and A2.

9. Check all connections.

1. Verify all switch settings.

2. Calibrate MAX SPD.

3. Verify motor field connections.

46 Troubleshooting

Problem Possible

Causes

Suggested

Solutions

Motor runs too fast at maximum speed setting

Motor will not reach the desired speed

Motor pulsates or surges under load

1. MAX SPD setting is too high.

2. Motor field connections are loose (shunt wound motors only).

1. MAX SPD setting is too low.

2. IR COMP setting is too low.

3. Motor is overloaded.

1. IR COMP is set too high.

2. Motor “bouncing” in and out of torque limit.

1. Recalibrate MAX SPD.

2. Check motor field connections.

1. Increase MAX SPD setting.

2. Increase the IR COMP setting.

3. Check motor load. Resize the motor if necessary.

1. Adjust the IR COMP setting slightly CCW until the motor speed stabilizes.

2. Make sure motor is not undersized for load; adjust FWD TQ and REV TQ trimpots.

47Troubleshooting

Problem Possible

Causes

Suggested

Solutions

Motor does not reverse

Motor makes a humming or buzzing noise

FWD or REV JOG speed is too slow or too fast

Touch panel, logic board, or power board connections might be loose.

Deadband setting is too high.

FWD or REV JOG speed not calibrated.

Check all connections.

Turn deadband (DB) trimpot CCW until the noise stops.

Calibrate FWD JOG and REV JOG trimpots (see Calibration section).

48 Troubleshooting

Figure 10. DC3RD Block Diagram

Block Diagram

49Troubleshooting

Prewired Connections

Figure 11. Prewired Connections to L1, L2 (115) and L2 (230)

50 Troubleshooting

Figure 12. Touch Panel, Logic Board,

and Power Board Connections

Most non-regenerative, variable-speed DC drives control current flow to a motor in one direction. The direction of current flow is the same direction as the motor rotation. Non-regenerative drives operate in Quadrant 1, and also in Quadrant 3 if the drive is reversible (see Figure 13, page 52). Motors must stop before reversing direction.

Unless dynamic braking is used, non-regenerative drives cannot oppose an overhauling load, and cannot decelerate a load faster than coasting to a lower speed.

Regenerative drives operate in two additional quadrants: Quadrant 2 and Quadrant 4. In these quadrants, motor torque is in the opposite direction of motor rotation. Regenerative drives can reverse a motor without contactors, switches, brake resistors, or inhibit plugs. They can also control an overhauling load and decelerate a load faster than it would take to coast to a lower speed.

Regenerative Drives

52 Regenerative Drives

Figure 13. Four Quadrant Operation

Reliance Electric Corporation hereby certifies that its DC3RD drive has been approved to bear the “CE” mark provided the conditions of approval have been met by the end user.

The DC3RD has been tested to the following test

specifications:

EN55011:1991 (emissions), and EN50082-1:1992 (immunity) Compliance allows the DC3RD to bear the CE mark. The end user, as described herein, falls into one of two

categories:

1. The Consumer will deploy a stand-alone unit as an integral, yet external, portion of the machine being operated.

2. The Original Equipment Manufacturer (OEM) will implement the product as a component of the machine being manufactured.

CE Compliance

AC Line Filters

In addition to EMI/RFI safeguards inherent in the DC3RD design, external filtering is required. Reliance Electric requires the Corcom® AC line filters listed in Table 3. Use model 5VR1 with drives rated for 3 ADC or below, and model 20VV1 with drives rated for 10 ADC or below.

Table 3. AC Line Filters

Corcom®Model Number 5VR1 20VV1

Rated Current 5 A 20 A Inductance 1.032 mH 0.88 mH Capacitance

Line to Line 0.303 µF 0.303 µF Line to Ground 0.011 µF 0.011 µF

Discharge Resistor 680 KΩ 680 KΩ

Wire the AC line filter within 0.25 meters of the drive. The ground connection from the filter must be wired to solid earth ground (resistance less than 500 ohms); not machine ground. This is very important!

If the end-user is using a CE-approved motor, the correct filter from Table 3 is all that is necessary to meet the EMC directives listed herein.

54 CE Compliance

Armature Filters

If the end-user is not using a CE-approved motor, a filter on the armature must also be used. See Table 4 for recommended armature filters. Use model CE04RG with drives rated for 3 ADC or below, and model CE10RG with drives rated for 10 ADC or below.

Table 4. Armature Filters

Reliance Electric®Model Number CE04RG CE10RG

Rated Current 4 A 10 A Inductance 1200 mH 1200 mH Capacitance (C1 and C2) @ 400W VDC

0.1 µF 0.1 µF

Discharge Resistor 680KΩ 680KΩ

Wire the armature filter to the DC output of the drive, as close to the drive as possible. The ground connection from the filter must be wired to solid earth ground (resistance less than 500 ohms); not machine ground. This is very important!

55CE Compliance

The end user must use the filtration listed in this addendum to comply with CE. The OEM may choose to provide alternative filtering that encompasses the Reliance Electric drive and other electronics within the same panel.The OEM has this liberty because CE is a machinery directive.

Whether or not every component in the OEM’s machinery meets CE, the OEM must still submit his machine for CE approval. Thus, no component must necessarily meet CE within the machine, as long as the OEM takes the necessary steps to guarantee the machine does meet CE. By the same token, even if every component in the OEM’s machine does meet CE, the machine will not necessarily meet CE as a machine.

Using CE-approved wiring practices (like proper shielding) and the filters should assure the drive will meet EN55014 (1993 emissions standard) and EN50082-1 (1992 immunity standard).

56 CE Compliance

Notes

U.S. Drives Technical Support

Tel: (1) 262.512.8176, Fax: (1) 262.512.2222, Email: support@drives.ra.rockwell.com, Online: www.ab.com/support/abdrives

Rockwell Automation DC3RD User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual