Magtrol DSP6000 User manual

Model DSP6000Model DSP6000
Model DSP6000Model DSP6000
Model DSP6000
High Speed PHigh Speed P
High Speed PHigh Speed P
High Speed Programmablerogrammable
rogrammablerogrammable
rogrammable
Dynamometer ControllerDynamometer Controller
Dynamometer ControllerDynamometer Controller
Dynamometer Controller
UserUser
UserUser
User’s Manual’s Manual
’s Manual’s Manual
’s Manual

While every precaution has been exercised
in the compilation of this document,
Magtrol, Inc. assumes no responsibility
for errors or omissions. Additionally, no
liability is assumed for any damages that
may result from the use of the information
contained within this publication.
LabVIEW®is a registered trademark of
National Instruments Corporation.
RadioShack®is a registered trademark of
the RadioShack Corporation.
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Sales and TSales and T
Sales and TSales and T
Sales and Technical Assistanceechnical Assistance
echnical Assistanceechnical Assistance
echnical Assistance
Manufacturers of:
Motor Test Equipment
!
Hysteresis Brakes and Clutches
70 Gardenville Parkway
Buffalo, New York 14224 USA
Tel: [phone] or 1-800-828-7844
Fax: [phone]
74M041 062200
MAGTROL, INC.MAGTROL, INC.
MAGTROL, INC.MAGTROL, INC.
MAGTROL, INC.

iii
Safety NotesSafety Notes
Safety NotesSafety Notes
Safety Notes
1. Make sure that all Magtrol dynamometers and electronic products are earth-
grounded, to ensure personal safety and proper operation.
2. Check line voltage before operating the DSP6000.
3. Make sure that dynamometers and motors under test are equipped with
appropriate safety guards.

iv
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v
TT
TT
Table of Contentsable of Contents
able of Contentsable of Contents
able of Contents
SALES AND TECHNICAL ASSISTANCE .............................................................................................. ii
SAFETY NOTES..................................................................................................................................... iii
1 - INTRODUCTION ................................................................................................................................ 1
About This Manual ............................................................................................................................................. 1
Shipping .............................................................................................................................................................. 1
UNPACKING YOUR DSP6000 ............................................................................................................................................ 1
About the Model DSP6000 Dynamometer Controller ....................................................................................... 1
FEATURES ......................................................................................................................................................................... 1
SPECIFICATIONS ................................................................................................................................................................. 2
Front Panel .......................................................................................................................................................... 3
Figure 1. Front Panel .................................................................................................................................... 3
ENABLING SECONDARY FUNCTIONS ..................................................................................................................................... 3
FRONT PANEL CONTROLS AND BUTTONS ............................................................................................................................. 4
Vacuum Fluorescent Display (VFD) .................................................................................................................. 5
STATUS DISPLAY MESSAGES .............................................................................................................................................. 5
DISPLAYING DESIRED INFORMATION .................................................................................................................................... 5
Rear Panel ........................................................................................................................................................... 6
Figure 2. Rear Panel ..................................................................................................................................... 6
Figure 3. Brake Connector ............................................................................................................................ 6
Figure 4. Accessory Torque/Speed Output.................................................................................................... 6
Figure 5. Dynamometer Connector ............................................................................................................... 6
REAR PANEL FUNCTIONS .................................................................................................................................................... 7
2 - ABOUT THE PID LOOP..................................................................................................................... 8
P (Proportional Gain) ......................................................................................................................................... 8
I (Integral) .......................................................................................................................................................... 8
D (Derivative) .................................................................................................................................................... 8
Figure 6. PID Loop ....................................................................................................................................... 8
Setting The Correct PID'S For Your Motor ........................................................................................................ 8
3 - INSTALLATION................................................................................................................................ 10
Setting Unit for Line Voltage ........................................................................................................................... 10
Figure 7. Cover for Voltage Selector, Fuses ............................................................................................... 10
Checking Your DSP6000 .................................................................................................................................. 10
4 - THE DSP6000 AS A STAND-ALONE UNIT (LOCAL CONTROL) ................................................. 12
Setting Desired Operating Parameters .............................................................................................................. 12
SET DISPLAY TO DESIRED POWER UNITS (WATTS OR HP) .................................................................................................. 12
SET DISPLAY TO DESIRED TORQUE UNITS ......................................................................................................................... 12
SET UPDISPLAY FOR DYNAMOMETER ............................................................................................................................... 12
SET UPCOMMUNICATIONS WITH PC ................................................................................................................................. 12
SET UPAUXILIARY INPUT ................................................................................................................................................ 12
SET TORQUE CONTROL .................................................................................................................................................... 12
SET SPEED CONTROL ....................................................................................................................................................... 13
SET OPEN LOOP CONTROL ............................................................................................................................................... 13
SET UPI/O PARAMETERS ................................................................................................................................................ 13
Setting Dynamometer Load .............................................................................................................................. 14
Using Internal Memory..................................................................................................................................... 14
STORING DATA POINTS .................................................................................................................................................... 14
RECALLING DATA POINTS ................................................................................................................................................ 14

vi
EXITING THE MEMORY MODE .......................................................................................................................................... 14
CLEARING THE MEMORY ..................................................................................................................................................14
5 - THE DSP6000 WITH A PC (REMOTE CONTROL) ......................................................................... 15
About the GPIB Interface ................................................................................................................................. 15
Figure 8. GPIB (IEEE-488) Interface ......................................................................................................... 15
INSTALLING THE GPIB (IEEE-488) CONNECTOR CABLE ................................................................................................... 15
CHANGING THE GPIB PRIMARY ADDRESS ......................................................................................................................... 15
Checking the DSP6000-To-PC Connection...................................................................................................... 16
Programming .................................................................................................................................................... 16
CODES FOR CR - LF ....................................................................................................................................................... 16
DSP6000 Command Set ................................................................................................................................... 16
COMMAND SET FOR DSP6000......................................................................................................................................... 17
Acquiring Speed-Torque Data .......................................................................................................................... 20
Selecting the Baud Rate for the RS-232 Interface ............................................................................................ 20
Figure 9. Connector Pin-Out ...................................................................................................................... 20
6 - CALIBRATION ................................................................................................................................. 21
Closed-Box Calibration .................................................................................................................................... 21
Calibration Schedule ......................................................................................................................................... 21
Basic Calibration Process ................................................................................................................................. 21
INITIAL CALIBRATION PROCEDURE .................................................................................................................................... 21
TORQUE OFFSET AND GAIN .............................................................................................................................................. 21
ACCESSORY TORQUE OFFSET AND GAIN ............................................................................................................................ 22
AUXILIARY INPUT OFFSET AND GAIN ................................................................................................................................22
ALTERNATE CALIBRATION PROCEDURE .............................................................................................................................. 22
Figure 10. Alternative Calibration ................................................................................................................ 23
7 - TROUBLESHOOTING ..................................................................................................................... 24
APPENDIX A: LABVIEW® PROGRAMMING EXAMPLES................................................................. 25
Simple Read ...................................................................................................................................................... 25
Torque Stabilized .............................................................................................................................................. 26
Speed Stabilized ................................................................................................................................................ 27
APPENDIX B: INERTIA CORRECTION .............................................................................................. 28
Inertial Effect on Motor Test Data.................................................................................................................... 28
Procedure for Inertia Correction ....................................................................................................................... 28
KEY CONDITIONS ............................................................................................................................................................ 28
APPENDIX C: FRONT PANEL/DISPLAY MENU FLOW CHARTS..................................................... 29
Dyno Setup Menu ............................................................................................................................................. 29
Com Setup Menu .............................................................................................................................................. 30
Aux Setup Menu ............................................................................................................................................... 31
Power Units Menu ............................................................................................................................................ 31
Torque Units Menu ........................................................................................................................................... 32
APPENDIX D: SCHEMATICS .............................................................................................................. 33
Encoder/Switch Board ...................................................................................................................................... 33
Power Supply .................................................................................................................................................... 33
DSP & Memory ................................................................................................................................................ 34
Analog I/O ........................................................................................................................................................ 35
GLOSSARY OF ABBREVIATIONS AND TERMS................................................................................ 36
MAGTROL LIMITED WARRANTY ....................................................................................................... 37

1
ABOUT THIS MANUAL
This manual contains information about the DSP6000
Dynamometer Controller and procedures for optimal
use. To obtain the best results from your unit, please
follow the procedures for operation.
SHIPPING
Your DSP6000 was packaged carefully for shipping.
Please notify your carrier and Magtrol Customer Service
if you believe your unit was damaged in shipping.
UNPACKING YOUR DSP6000
1. Save all shipping cartons and packaging material
until you inspect the DSP6000.
2. Inspect the DSP6000 for any evidence of damage
in shipping.
3. Make sure the carton contains the following:
•DSP6000 Dynamometer Controller
•Line cord
•User's Manual for the DSP6000
•Calibration certificate
ABOUT THE MODEL DSP6000
DYNAMOMETER CONTROLLER
Magtrol's Model DSP6000 Dynamometer Controller
provides superior motor testing capabilities by using
state-of-the-art digital signal processing technology.
The DSP6000 both controls the dynamometer and
provides digital readouts on the front panel. The
DSP6000 is designed to work with all Magtrol load cell
dynamometers, including the following dynamometer
models:
001-DH 015-DH 008-DH 517-DE
601-DH007-DH508-DH518-DE
004-DH 507-DH 018-DH 001-DTH
005-DH017-DH518-DH002-DTH
505-DH 517-DH 528-DH 003-DTH
FEATURES
Fast, full curve data acquisition
Free-run to locked rotor in seconds.
1 - Introduction1 - Introduction
1 - Introduction1 - Introduction
1 - Introduction
High-speed data acquisition
120 torque and speed points per second via IEEE
(GPIB) bus.
Speed and torque operating modes
Each mode provides independent PID settings for
improved dynamometer control.
Programmable digital PID values
Controlled and stored either with Magtrol M-Test
software or manually.
Single point or programmed load control
Single or multi-point torque and speed stabilized testing
using Magtrol M-Test software.
Two standard computer interfaces
RS-232 and IEEE-488.
Additional analog input
Accepts any ± 5 VDC transducer.
Vacuum fluorescent display
Displays torque, speed, power, auxiliary input and PID
values.
Many torque measurement options
Includes English, metric, and SI torque readings as
standard.
Closed box calibration of torque and auxiliary input
Eliminates need to open box for adjustments.
The DSP6000 is designed to work with any personal
computer using an IEEE-488 or an RS-232 interface,
or as a stand-alone unit. In a computer-controlled
environment, the DSP6000 provides the following
motor testing capabilities:
•Proportional (P), plus Integral (I), plus
Derivative (D) closed loop control (PID loop).
•Torque (Q) and Speed (N) data acquisition at a
rate of up to 120 readings per second.
•Automatic progressive loading in either
decreasing or increasing speed mode.
•Ability to remove the Effects of Inertia from
dynamically obtained data. (See Appendix B)
•Complete curve capability for most motor
types, including single/poly phase induction,
AC/DC series, PMDC, brushless DC, air and
internal combustion (if suitably coupled).

2
Magtrol Model DSP6000 Dynamometer ControllerChapter 1 - Introduction
SPECIFICATIONS
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3
Magtrol Model DSP6000 Dynamometer Controller Chapter 1 - Introduction
FRONT PANEL
Figure 1. Front Panel
MODEL DSP6000
DYNAMOMETER CONTROLLER
The front panel provides a power switch, eight control
buttons, a Decrease/Increase Dial, and Vacuum
Fluorescent Display (VFD). The front panel controls
and buttons, from left to right, are:
•Power switch
•Six double-function control buttons:
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•Three single-function control buttons:
•SHIFT (to enable secondary functions printed
in blue above control buttons)
•Up/Left arrow
! (scroll up, increase
magnitude)
•Down/Right arrow
" (scroll down,
decrease magnitude)
•Decrease/Increase Dial
NOTE: Refer to the table, “Front Panel
Controls and Buttons”later in
this chapter for further
explanation of button features
and use.
ENABLING SECONDARY FUNCTIONS
To enable the secondary function of the double-function
control buttons:
1. Press the blue SHIFT button and release it. (The
word SHIFT appears in the display.)
2. Press a control button to enable the function shown
in blue letters above the control button:
POWER UNITS, TORQUE UNITS, AUX SETUP,
COM SETUP or DYNO SETUP.
3. Press the SHIFT button again to exit the secondary
function.

4
Magtrol Model DSP6000 Dynamometer ControllerChapter 1 - Introduction
FRONT PANEL CONTROLS AND BUTTONS
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5
Magtrol Model DSP6000 Dynamometer Controller Chapter 1 - Introduction
VACUUM FLUORESCENT DISPLAY (VFD)
The VFD provides information about the control
functions, the motor under test, and an auxiliary input
device (if connected). The displays, from left to right,
are:
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The DSP6000 is shipped with the Contrast setting at
zero (lowest) in order to prolong display life. If it is
necessary to increase the contrast for improved
readability, use the lowest possible setting to achieve
that result. Using a setting higher than necessary may
cause display segments to burn-in over a period of time,
resulting in uneven illumination from segment to
segment.
STATUS DISPLAY MESSAGES
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DISPLAYING DESIRED INFORMATION
Local control:
1. Press SHIFT and release; then press POWER
UNITS to see UNITS displayed.
2. Press UP
! or DOWN " to scroll through
available choices.
3. Press SHIFT to exit.
4. Press SHIFT and release; then press TORQUE
UNITS to see UNITS displayed.
5. Press UP
! or DOWN " to scroll through
options for units.
6. Press SHIFT to exit.
7. Press RECALL to view memory contents; last in =
first out.
8. Press SHIFT to exit.
Remote control:
Refer to “DSP6000 Command Set”in Chapter 4 - The
DSP6000 with a PC for a list of commands recognized
by the DSP6000.
Auxiliary Input:
1. Press SHIFT and release; then press AUX SETUP.
2. Rotate Decrease/Increase Dial to select scale.
3. Press SHIFT to exit.

6
Magtrol Model DSP6000 Dynamometer ControllerChapter 1 - Introduction
REAR PANEL
The rear panel provides connectors and receptacles for connecting to appropriate equipment.
Figure 2. Rear Panel
For use with Magtrol Readouts
only. Connecting another device
to this output may cause
equipment failure.
Figure 3. Brake Connector
1
2
3
4
5
6
7
8
9
10
11
12
13
14
COMMON
D.P.
TACH. SIGNAL
N/C
D.P.
TORQUE COMMON
TORQUE SIGNAL
N/C
N/C
+
-
+
-
TACH. +5.0 VDC
ISOLATED
22 VDC
ISOLATED
22 VDC
CONNECTOR SHELL
& CABLE SHIELD
Figure 5. Dynamometer Connector
67
13
45
2
D.P.
D.P.
N/C
TORQUE
OUTPUT
TORQUE
COMMON
TACH.
COMMON
TACH.
SIGNAL
Figure 4. Accessory Torque/Speed Output

7
Magtrol Model DSP6000 Dynamometer Controller Chapter 1 - Introduction
REAR PANEL FUNCTIONS
The rear panel, from left to right, provides the following functions:
Label Function
BRAKE Connect dynamometer brake cable here
BRAKE FUSE
Contains brake fuse (5 x 20mm)
UL/CSA 1.25A 250V SB
IEC 1A 250V T
CTRL OUT Connect to Model 5241 Power Amplifier when usin
g
HD-825
Dynamometer
ACCESSORY TORQUE-SPEED OUTPUT
Connect accessory output cable here (optional).
For use with Ma
g
trol Readouts only. Connectin
g
another device to
this output may cause equipment failure.
DYNAMOMETER Connect dynamometer si
g
nal cable here
AUX INPUT Connect auxiliary instrument cable here
RS-232C Use this socket for RS-232 connector cable
GPIB/IEEE-488 Use this socket for GPIB cable (meets IEEE-488 specifications)
POWER Attach power cord here
EARTH GROUND Attach earth
g
round here

8
2 - About the PID L2 - About the PID L
2 - About the PID L2 - About the PID L
2 - About the PID Loopoop
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The DSP6000 has PID adjustment capability for both
the speed and torque modes to provide you with the
best system response. The PID Loop comprises the
following three variables:
P = Proportional Gain
I = Integral
D = Derivative
The setpoint is the desired load or speed. Error is the
difference between the setpoint and the actual
measurement.
P (PROPORTIONAL GAIN)
With proportional gain, the controller output is
proportional to the error or to a change in measurement.
Deviation from the setpoint is usually present.
Increasing proportional gain will make the PID loop
unstable. Increasing integral value eliminates this
instability. For best loop control, set the proportional
gain as high as possible without causing the loop to
become unstable.
I (INTEGRAL)
With integral, the controller output is proportional to
the amount of time the error is present. Increasing the
integral value eliminates the offset from the setpoint. If
the response becomes oscillatory, increase the derivative
value.
D (DERIVATIVE)
With derivative, the controller output is proportional to
the rate of change of the measurement or error.
Derivative can compensate for a changing measurement.
Derivative takes action to inhibit more rapid changes
of the measurement than proportional gain.
When a setpoint change occurs, the derivative causes
the controller gain to go the "wrong" way when the
measurement gets close to the setpoint. Derivative can
be used to control overshoot. If derivative is used, higher
gain and integral values are usually necessary.
Magtrol offers a comprehensive motor-test program
which would satisfy most of your needs. Call Magtrol
Sales at 1-800-828-7844 or 1-716-668-5555 to request
your custom software.
NOTE: To set PID values, see Chapter 3
- Installation.
Figure 6. PID Loop
SETTING THE CORRECT PID'S FOR
YOUR MOTOR
NOTE: Each type of motor may have it's
own optimum PID setting.
NOTE: The PID settings are scaled to the
maximum speed setting;
therefore the maximum speed
setting should be adjusted to just
higher than the free-run speed of
the motor being tested.
When testing a new motor where the optimal PID's are
unknown:
1. Begin with the Proportional Gain (P) and the
Integral (I) both set to a low value and the Derivative
(D) set to zero. This will allow the best opportunity
for finding the optimum in the lowest amount of
steps.
2. Using the DSP6000 in the speed mode: Set the
speed target at approximately 90% of the free-run
speed.

9
Magtrol Model DSP6000 Dynamometer Controller Chapter 2 - About the PID Loop
The larger the I value the faster the DSP6000 will move
to the target number, but an I value too large will cause
instability (oscillation). Once the optimum values are
found, these steps should be repeated at different
percentages of speed to ensure that they are the best
combination for the entire speed range.
NOTE: The PID values for a speed
stabilized test and a ramp test
will vary. Therefore, PID
adjustments may be needed when
changing from a stabilized test to
ramp testing with the same
motor.
The D value has little or no effect on this type of testing,
therefore the D value can remain at zero.
3. Turn the brake to the ON position and observe how
the actual speed moves toward the target speed.
4. If the speed moves slowly or not at all, increase the
P until the target speed is achieved.
5. Turn the brake OFF.
6. Turn the brake ON and note how fast the free-run
speed changes to the target speed.
7. If the speed conversion does not happen quickly,
increase the I value.
8. Repeat steps 4-7 until the motor moves from the
free-run to the target speed as quickly as possible
without excessive overshoot.
Example:
Motor type: AC
Free-Run speed: 1750
1. Set maximum speed to 1800
2. Set P = 5 I =5 D = 0
3. Set target speed to 1600
4. Turn brake ON—no response
5. Move P value to 10—still slow, not reaching 1600
Note: Increasing the P more will not
increase the operating
characteristics without first
increasing the I value.
6. Turn brake OFF
7. Move I value to 10
8. Turn brake ON—Reaching 1600 very slowly
9. With the brake OFF, adjust the P to 15
10. Turn the brake ON—never reaching 1600
11. Turn the brake OFF. Decrease the P to 10 and
increase the I to 15
12. Turn the brake ON—reaches 1600 Faster
13. Turn the brake OFF. Increase I to 20
14. Turn the brake ON—reaches 1600 Faster
15. Turn the brake OFF. Increase I to 25
16. Turn the brake ON—reaches 1600 Faster
17. Turn the brake OFF. Repeat

10
Before installing your DSP6000, you should become
familiar with the front and rear panels, as outlined in
Chapter 1-Introduction.
Make sure the DSP6000 is earth
grounded before starting!
SETTING UNIT FOR LINE VOLTAGE
The DSP6000 will operate with either of the following
power sources:
•120V 50/60 Hz
•240V 50/60 Hz
1. Find the line cord receptacle on rear panel. The
line cord is a detachable NEMA Standard 3 wire.
2. Make sure the selector matches the power source
(numbers should match the line voltage).
If not:
•Locate the power entry module.
•Remove the line cord.
•Insert a screwdriver into the slot and open the
cover.
•Slide the voltage selector so the desired line
voltage appears in the window.
•Install the appropriate fuses for that voltage.
Figure 7. Cover for Voltage Selector, Fuses
CHECKING YOUR DSP6000
Do not overload or stall the motor.
Prolonged overload can cause the motor
to overheat.
NOTE: To ensure that the DSP6000 is
operational, a Magtrol
Dynamometer with a test motor
installed must be connected to
the DSP6000. It is not required
that the DSP6000 be connected
to a computer.
1. Connect the DSP6000 to the dynamometer using
the following cables:
•14-pin signal cable
•2-pin brake power cable
2. Turn on DSP6000 power.
Desired results:
•The display panel will show all segments of
the VFD (series of rectangles), indicating that
the DSP6000 is executing a self-test routine.
•Message "MAGTROL MODEL DSP6000"
appears.
•Next screen “INPUT UNITS/ENCODER”
appears.
NOTE: The dynamometer torque units
and the speed encoder can be
selected now, or after the normal
display panel appears.
•Normal display panel appears.
3. Press P button and set to 20% with Decrease/
Increase Dial.
4. Press I button and set to 30% with Decrease/Increase
Dial.
5. Press TORQUE SET button.
6. Adjust torque value so that it equals zero.
3 - Installation3 - Installation
3 - Installation3 - Installation
3 - Installation

11
Magtrol Model DSP6000 Dynamometer Controller Chapter 3 - Installation
7. Start the test motor.
8. Allow the motor speed to stabilize at its no-load
speed for a few seconds.
9. Press the BRAKE ON/OFF button to ON.
10. Press the TORQUE SET button.
11. Turn the Decrease/Increase Dial clockwise.
Desired results:
•The torque reading will increase.
As brake power is applied, load is applied to
the motor. The applied torque increases as the
Decrease/Increase Dial is turned clockwise. For
most motors, loading is indicated by motor
speed reduction.
12. Reduce the torque load to zero by turning the
Decrease/Increase Dial counterclockwise.
Desired results:
•The torque reading will decrease.
13. Press the BRAKE ON/OFF Button to OFF.
14. Use the SHIFT button to enable the MAX SPEED
function.
15. Turn the Decrease/Increase Dial clockwise until the
MAX speed reading is slightly greater than the
motor’s free-run speed.
16. Press the SPEED SET button - Turn the
DECREASE/INCREASE DIAL until speed
setpoint no longer increases (max. speed setting).
17. Press P button and set to 10%.
18. Press I button and set to 15%.
19. Press the BRAKE ON/OFF button ON.
20. Press the SPEED SET button.
21. Turn the Decrease/Increase Dial counterclockwise.
Desired results:
•The motor speed will decrease.
NOTE: Adjust the motor’s stability by
adjusting the PID values. See
Chapter 2 - About the PID Loop.
22. Turn off power to the test motor.
NOTE: If the desired results did not
occur, please see Chapter 7 -
Troubleshooting.

12
NOTE: Although the DSP6000 can be
used without a computer, it will
only perform at a fraction of its
capability.
SETTING DESIRED OPERATING
PARAMETERS
NOTE: See Appendix C: Front Panel/
Display Menu Flow Charts.
SET DISPLAY TO DESIRED POWER UNITS (WATTS
OR HP)
1. Press and release SHIFT.
2. Press POWER UNITS.
SET DISPLAY TO DESIRED TORQUE UNITS
1. Press and release SHIFT.
2. Press TORQUE UNITS.
3. Continue pressing TORQUE UNITS until the
desired unit of measure is displayed.
4. Press SHIFT to exit.
SET UPDISPLAY FOR DYNAMOMETER
1. Press and release SHIFT.
2. Press DYNO SETUP.
3. Press TORQUE UNITS until input unit matches
dynamometer.
4. Press ENCODER until selection matches encoder
installed on dynamometer (60 bit = standard).
5. Press SHIFT to exit.
SET UPCOMMUNICATIONS WITH PC
(If necessary)
1. Press and release SHIFT.
2. Then press COM SETUP.
3. Select GPIB ADDRESS. Press GPIB ADDRS until
appropriate address appears. (See “Changing the
GPIB Primary Address”in Chapter 5 - The
DSP6000 with a PC (Remote Control.)
4. Select baud rate. Press RS-232 BAUD until
appropriate baud rate appears.
5. Press SHIFT to exit.
SET UPAUXILIARY INPUT
(If necessary)
See “Displaying Desired Information”in Chapter 1 -
Introduction.
SET TORQUE CONTROL
NOTE: See Chapter 2 - About the PID
Loop.
1. Press the TORQUE SET button.
2. Use the UP ! and DOWN " buttons and the
Decrease/Increase Dial to adjust the setpoint to zero.
3. Press the P button.
4. Use the Decrease/Increase Dial to preset an initial
value of 20.
5. Press the I button.
6. Use the Decrease/Increase Dial to preset an initial
value of 30.
7. Press the D button.
8. Use the Decrease/Increase Dial to preset an initial
value of 0.
9. Use the BRAKE ON/OFF button to turn the brake
ON.
10. Start your motor under test.
11. Press the TORQUE SET button and adjust the
setpoint to the desired load.
12. Check the torque display to make sure that the
dynamometer loads the motor under test to that
torque load.
NOTE: If the response is too slow or
oscillatory, adjust the values for
P, I, and D.
4 - The DSP6000 as a Stand-4 - The DSP6000 as a Stand-
4 - The DSP6000 as a Stand-4 - The DSP6000 as a Stand-
4 - The DSP6000 as a Stand-Alone Unit (LAlone Unit (L
Alone Unit (LAlone Unit (L
Alone Unit (Local Control)ocal Control)
ocal Control)ocal Control)
ocal Control)

13
Magtrol Model DSP6000 Dynamometer Controller Chapter 4 - The DSP6000 as a Stand-Alone Unit (Local Control)
Desired results:
•The dynamometer should load the motor under test
to the load point quickly with little or no overshoot
when the BRAKE function cycles ON or OFF.
Do not exceed the capabilities of the
dynamometer or the power source in use.
Motors draw very large currents when
held at locked rotor, and overheating may
result.
When using torque control, you cannot
test induction motors beyond breakdown,
except at locked rotor.
SET SPEED CONTROL
When using speed control, motors between 0 and 100
RPM cannot be tested unless the dynamometer is
equipped with an optional speed encoder.
1. Use the SHIFT button to enable the MAX SPEED
function.
2. Use the UP
! and DOWN " buttons and the
Decrease/Increase Dial to set a value equal to or
slightly greater than the free-run speed of the motor
under test.
3. Press the SHIFT button to exit the MAX SPEED
function.
4. Press the SPEED SET button.
5. Use the UP
! and DOWN " buttons and the
Decrease/Increase Dial to set a speed equal to the
max. speed.
6. Press the P button.
7. Use the Decrease/Increase Dial to preset a value of
10.
8. Press the I button.
9. Use the Decrease/Increase Dial to preset a value of
15.
10. Press the D button.
11. Use the Decrease/Increase Dial to preset a value of
0.
12. Use the BRAKE ON/OFF button to turn the brake
ON.
13. Start your motor under test.
14. Press the SPEED SET button and adjust the setpoint
to the desired speed.
Desired results:
•The dynamometer should load the motor under test
to the desired speed quickly with little or no
overshoot when the BRAKE button is cycled ON
or OFF.
NOTE: If the response is too slow or
oscillatory, adjust the values for
P, I and D.
SET OPEN LOOP CONTROL
1. Use the BRAKE ON/OFF button to turn the brake
ON.
2. Press and hold the TORQUE SET button until you
hear a second beep.
3. The TORQUE SET POINT display will now
indicate 0.00%.
4. Use the UP
! and DOWN " buttons and the
Decrease/Increase Dial to set a value of current
equal to the percent of full scale output (1 Amp).
5. To exit the Open Loop Control mode, press any of
the PID buttons or the SPEED SET button.
Desired results:
•The dynamometer should load the motor under test.
Because the mode is open loop, the controller will
not stabilize on speed or torque, but will apply a
constant current to the dynamometer brake. The
actual loading will change as the brake heats up or
as other external factors change. The PID's have no
effect in this mode.
SET UPI/O PARAMETERS
1. Press and release SHIFT.
2. Press SETUP.
3. Press the DOWN
" button twice.
4. Press SHIFT.
5. Press UP ! or DOWN " until you see the
desired contrast level.

14
Magtrol Model DSP6000 Dynamometer Controller
Chapter 4 - The DSP6000 as a Stand-Alone Unit (Local Control)
6. Press SHIFT.
7. Press UP
! or DOWN " until you see the
desired GPIB address.
8. Press SHIFT.
9. Press UP ! or DOWN " until you see the
desired RS-232 baud rate.
10. Press SHIFT to exit.
SETTING DYNAMOMETER LOAD
1. Press the UNITS DISPLAY button.
2. Use the Decrease/Increase Dial to adjust the current
output to 0%.
3. Use the BRAKE ON/OFF button to turn the brake
ON.
4. Start the motor under test.
5. Use the UP
! and DOWN " buttons and the
Decrease/Increase Dial to adjust the loading on the
motor.
Do not exceed the capabilities of the
dynamometer or the power source in use.
Motors draw very large currents when
held at locked rotor, and overheating may
result. When using open loop current
control, induction motors cannot be
tested beyond breakdown, except at
locked rotor.
USING INTERNAL MEMORY
STORING DATA POINTS
1. Press and release STORE. The VFD will indicate
STORE followed by a number. This indicates the
memory location that contains the data.
2. Continue pressing STORE at each desired point.
RECALLING DATA POINTS
1. Press and release RECALL. The VFD will indicate
RECALL followed by a number. This number
indicates the memory location that is being
displayed. The order of recalled data is LAST IN =
FIRST OUT (LIFO). A "M" also appears to the
right of the SPEED display to let the user know
that the displayed data is from memory and not real
time data.
2. Continue pressing RECALL until all the desired
data is retrieved. Once data has been recalled, it is
lost from internal memory.
EXITING THE MEMORY MODE
1. Press and release SHIFT.
CLEARING THE MEMORY
1. Press and release SHIFT.
2. Then press CLR MEM.