AMCI PowerFlex 750 Series User manual

MICRO CONTROLS INC.
ADVANCED
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Manual #: 940-0E013

ADVANCED MICRO CONTROLS INC.
GENERAL INFORMATION
Important User Information
The products and application data described in this manual are useful in a wide variety of different applica-
tions. Therefore, the user and others responsible for applying these products described herein are responsible
for determining the acceptability for each application. While efforts have been made to provide accurate infor-
mation within this manual, AMCI assumes no responsibility for the application or the completeness of the
information contained herein.
UNDER NO CIRCUMSTANCES WILL ADVANCED MICRO CONTROLS, INC. BE RESPONSIBLE OR
LIABLE FOR ANY DAMAGES OR LOSSES, INCLUDING INDIRECT OR CONSEQUENTIAL DAM-
AGES OR LOSSES, ARISING FROM THE USE OF ANY INFORMATION CONTAINED WITHIN THIS
MANUAL, OR THE USE OF ANY PRODUCTS OR SERVICES REFERENCED HEREIN.
No patent liability is assumed by AMCI, with respect to use of information, circuits, equipment, or software
described in this manual.
The information contained within this manual is subject to change without notice.
This manual is copyright 2013 by Advanced Micro Controls Inc. You may reproduce this manual, in whole or
in part, for your personal use, provided that this copyright notice is included. You may distribute copies of this
complete manual in electronic format provided that they are unaltered from the version posted by Advanced
Micro Controls Inc. on our official website: www.amci.com. You may incorporate portions of this documents
in other literature for your own personal use provided that you include the notice “Portions of this document
copyright 2013 by Advanced Micro Controls Inc.” You may not alter the contents of this document or charge a
fee for reproducing or distributing it.
Standard Warranty
ADVANCED MICRO CONTROLS, INC. warrants that all equipment manufactured by it will be free from
defects, under normal use, in materials and workmanship for a period of [18] months. Within this warranty
period, AMCI shall, at its option, repair or replace, free of charge, any equipment covered by this warranty
which is returned, shipping charges prepaid, within eighteen months from date of invoice, and which upon
examination proves to be defective in material or workmanship and not caused by accident, misuse, neglect,
alteration, improper installation or improper testing.
The provisions of the "STANDARD WARRANTY" are the sole obligations of AMCI and excludes all other
warranties expressed or implied. In no event shall AMCI be liable for incidental or consequential damages or
for delay in performance of this warranty.
Returns Policy
All equipment being returned to AMCI for repair or replacement, regardless of warranty status, must have a
Return Merchandise Authorization number issued by AMCI. Call [phone] with the model number and
serial number (if applicable) along with a description of the problem during regular business hours, Monday
through Friday, 8AM - 5PM Eastern. An "RMA" number will be issued. Equipment must be shipped to
AMCI with transportation charges prepaid. Title and risk of loss or damage remains with the customer until
shipment is received by AMCI.
24 Hour Technical Support Number
24 Hour technical support is available on this product. If you have internet access, start at www.amci.com.
Product documentation and FAQ’s are available on the site that answer most common questions.
If you require additional technical support, call [phone]. Your call will be answered by the factory dur-
ing regular business hours, Monday through Friday, 8AM - 5PM Eastern. During non-business hours an auto-
mated system will ask you to enter the telephone number you can be reached at. Please remember to include
your area code. The system will page an engineer on call. Please have your product model number and a
description of the problem ready before you call.
We Want Your Feedback
Manuals at AMCI are constantly evolving entities. Your questions and comments on this manual are both wel-
comed and necessary if this manual is to be improved. Please direct all comments to: Technical Documenta-
tion, AMCI, 20 Gear Drive, Terryville CT 06786, or fax us at [phone]. You can also e-mail your
questions and comments to [email protected]

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TABLE OF CONTENTS
General Information
Important User Information ..................... 2
Standard Warranty ................................... 2
Returns Policy .......................................... 2
24 Hour Technical Support Number ........ 2
We Want Your Feedback ......................... 2
About this Manual
Audience .................................................. 5
Trademark Notices ................................... 5
Revision Record ....................................... 5
Previous Revisions ........................ 5
Navigating this Manual ............................ 5
Manual Conventions ................................ 6
Where To Go From Here ......................... 6
Introduction to the RD750
The RD750 ............................................... 7
R-D Converter ............................... 7
Encoder Output .............................. 8
Software Configuration ................. 8
Additional Notes on
Reversing Count Direction ............ 9
Status LED’s .................................. 10
LED1: Host Drive 
Connection State ........................ 10
LED2: Resolver State .................. 11
Compatible Sensors ................................. 12
Resolver Transmitters .................... 12
Resolver Control Transformers ..... 12
Single and Multi-Speed 
Resolvers ..................................... 13
Resolver Tracking Speed ............... 13
Specifications
RD750 Specifications ............................. 14
Installing the RD750
Setting Encoder Jumper and 
DIP Switches .......................................... 15
RD750 Orientation ........................ 15
Setting the Encoder Jumper .......... 15
DIP Switch Settings ...................... 16
Settings for Common Resolvers ... 17
Determining Settings for 
Other Resolvers .......................... 17
Frequency Setting ......................... 17
TR Setting for Transmitter 
Resolvers .................................... 18
TR Setting for Control 
Transformer Resolvers ............... 18
Installing the RD750 ................................ 19
Wiring the Resolver Input ........................ 20
Reversing Count Direction ........... 20
Encoder Output Wiring ............................ 20
Determining the TR Setting of a 
Control Transformer Resolver ............... 21
With a True RMS 
Meter or Scope ............................ 21
With the Resolver 
Status LED (LED2) .................... 21
Option Module Parameters
Parameter List .......................................... 22
Troubleshooting
Faults and Alarms .................................... 25
Software Configuration
Drive Add On Profiles ............................. 26
Integrated Motion ..................................... 26
Connected Components Workbench ........ 26
DriveTools / DriveExecutive ................... 26

Table of Contents
ADVANCED MICRO CONTROLS INC.
4
Notes

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ABOUT THIS MANUAL
Audience
This manual explains the set-up, installation, and operation of AMCI’s RD750 Resolver Feedback Option
Module for the Allen-Bradley PowerFlex 750-Series AC Drives. It is written for the engineer responsible for
incorporating these modules into a design, as well as the engineer or technician responsible for its actual
installation.
Trademark Notices
The AMCI logo is a trademark of Advanced Micro Controls Inc.
All other trademarks contained herein are the property of their respective holders.
Revision Record
This manual, 940-0E013, is the fourth release of this manual. It adds additional information about not remov-
ing or installing the resolver connector under power. It was initially released on November 13th, 2013.
Previous Revisions
940-0E012: Third Release. 9/16/2013. Added information on the encoder emulator and its outputs.
940-0E011: Second Release. 9/3/2013. Added information on using control transformer resolvers.
940-0E010: Initial Release. 8/15/2013.
Navigating this Manual
This manual is designed to be used in both printed and on-line formats. Its on-line form is a PDF document,
which requires Adobe Acrobat Reader version 7.0+ to open it. Bookmarks of all the chapter names, section
headings, and sub-headings were created in the PDF file to help navigate it. The bookmarks should have
appeared when you opened the file. If they didn’t, press the F5 key on Windows platforms to bring them up.
Throughout this manual you will find blue text that functions as a hyperlink in HTML documents. Clicking
on the text will immediately jump you to the referenced section of the manual. If you are reading a printed
manual, most links include page numbers. You will also find red text that functions as a hyperlink. These
links will bring you to the AMCI website. Note that after clicking on a red link, the program may ask for con-
firmation before connecting to the Internet.
The PDF file is password protected to prevent changes to the document. You are allowed to select and copy
sections for use in other documents and, if you own Adobe Acrobat version 7.0 or later, you are allowed to
add notes and annotations.
Read this chapter to learn how to navigate through this manual and familiarize
yourself with the conventions used in it. The last section of this chapter high-
lights the manual’s remaining chapters and their target audience.

ABOUT THIS MANUAL
ADVANCED MICRO CONTROLS INC.
6
Manual Conventions
Three icons are used to highlight important information in the manual:
NOTES highlight important concepts, decisions you must make, or the implications of those
decisions.
CAUTIONS tell you when equipment may be damaged if the procedure is not followed
properly.
WARNINGS tell you when people may be hurt or equipment may be damaged if the pro-
cedure is not followed properly.
The following table shows the text formatting conventions:
Where To Go From Here
This manual contains information that is of interest to everyone from engineers to operators. The table below
gives a brief description of each section’s contents to help you find the information you need to do your job.
Format Description
Normal Font Font used throughout this manual.
Emphasis Font Font used the first time a new term is introduced.
Cross Reference When viewing the PDF version of the manual, clicking on
the cross reference text jumps you to referenced section.
HTML Reference When viewing the PDF version of the manual, clicking on
the HTML reference text will open your default web
browser to the referenced web page.
Section Title Starting
Page Intended Audience
Introduction to the
RD750 7Anyone new to the RD750 Resolver Feedback Option Module.
This section gives a basic overview of the features available on the
unit and status LED blink patterns.
Specifications 14 Specifications table for the RD750.
Installing the RD750 15 Anyone that must install an RD750. Includes information on DIP
switch settings, mounting, grounding, and wiring.
Option Module
Parameters 22 Anyone that needs a listing of the parameters available when using
the 20-750-ENC-1 software profile and how the RD750 uses these
settings.
Troubleshooting 25 Anyone that needs a listing of the fault codes available when using
the 20-750-ENC-1 software profile and when the RD750 will gen-
erate these codes.
Software
Configura-
tion 26 Anyone that needs basic information on the Rockwell Automation
software packages that can be used to configure a PowerFlex 750-
Series AC Drives with an RD750.

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INTRODUCTION TO THE RD750
The RD750
For over twenty years, Rockwell Automation and
Advanced Micro Controls Inc. have partnered
together to offer the most advanced sensor interface
technology on the market. Based on this long
standing relationship, AMCI is proud to announce
the first and only resolver interface module for the
PowerFlex 750-Series AC Drives from Rockwell
Automation.
Utilizing advanced resolver to digital conversion
technology, the RD750 can interface with a wide
variety of resolvers, including those from AMCI,
Moog, Reliance, and Tamagawa, as well as many
others.
R-D Converter
The heart of the resolver-to-digital converter is a
monolithic IC that utilizes a ratiometric, Type II
tracking loop converter for high speed data acquisi-
tion without velocity induced errors.
To be as accurate as possible, the monolithic R/D converter requires a very specific return voltage from the
sine and cosine windings, as well as minimal phase shift between the reference voltage and these return sig-
nals. The RD750 has additional hardware to guarantee R/D conversion accuracy.
Analog Buffer: The analog buffer presents a specific load to the resolver. This load prevents the mag-
netic cores of the resolver from saturating if it is operated at a voltage higher than its published specifi-
cation. (A resolver can always be operated at a lower voltage without accuracy concerns.)
Analog Multiplier: On power up, or when the RD750 receives a reset signal from the drive, the card
reads the sine and cosine return voltages multiple times for approximately sixty milliseconds. With
these readings, the RD750 calculates the proper coefficient for an analog multiplier that adjusts the sine
and cosine signals so they are optimized for the monolithic R/D converter.
Phase Compensator: The readings that are used to set the analog multiplier are also used by the
RD750 to determine the phase shift between the reference voltage and the return signals. Once this
value is known, the RD750 generates a second reference signal that is identical in frequency to the first
reference, but phase shifted by the proper amount. The first reference voltage signal drives the resolver.
The second reference is fed into the R/D converter. To the R/D converter, the reference and return sig-
nals appear to be in phase, yielding a more accurate conversion.
The RD750 offers multi-turn position feedback with a single turn position resolution of up to 65,536 counts
per turn and a tracking rate of up to 150,000 RPM. In addition to the single resolver interface, the RD750
offers an A/B quadrature output with Z pulse, powered by differential output drivers. These drivers are
jumper selectable for 5 or 12 Vdc operation.
The module’s basic configuration is accomplished with a bank of ten DIP switches located on the board. The
parameters set with these switches are:
Transformation Ratio: Thirteen settings that cover a range of 0.15 to 1.75†
Reference Frequency: Fifteen settings from 2.0 to 20.0 kHz
Resolver Position Resolution: Settings of 10, 12, 14, or 16 bits per turn
† In order to control the level of the return signals, Transformation Ratio is a more important setting to the RD750 then
setting the level of the reference voltage. Setting the TR sets the reference voltage between 3.75 and 15.00 Vrms.

Introduction to the RD750
ADVANCED MICRO CONTROLS INC.
8
The RD750 (continued)
Encoder Output
In addition to the position, velocity, and status information available over the backplane, the RD750 offers the
resolver position data as an incremental quadrature encoder output. The RD750 offers differential ±A, ±B,
and ±Z outputs. The outputs have a factory default output voltage of 5 Vdc, but can be changed to 12 Vdc
outputs with a single jumper.
The resolver position resolution also sets the resolution of the encoder output. As shown in the figure below,
the encoder outputs make one quadrature state change for every one count change in resolver position. The
equipment you attach to the RD750 must be capable of X4 decoding to achieve the same resolution as the
resolver position.
Figure 1 Encoder Output Waveforms
Software Configuration
Software configuration is simplified by closely emulating the Rockwell Automation 20-750-ENC-1 Single
Incremental Encoder Option Module. In any Rockwell Automation software that supports the PowerFlex
750-Series Drives, such as RSLogix 5000 or Studio 5000 software, simply select the 20-750-ENC-1 module
for the slot that the RD750 is plugged into and position and status information from the RD750 will be trans-
ferred to and from the drive.
The 20-750-ENC-1 module supplies captured position data to the drive during homing operations. With the
ENC-1 module, homing can be done to the marker (Z) pulse of the encoder or to a discrete input. The RD750
does not have a discrete home input. If you issue a homing command to the drive that uses the marker pulse,
the RD750 emulates the result by using the electrical zero position of the resolver. If you issue a homing
command to the drive that uses the discrete input, the RD750 will respond, but it will still use the electrical
zero position of the resolver.
A
B
Z
123405
Resolver Count
Encoder
O
utputs

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Introduction to the RD750
9
The RD750 (continued)
Software Configuration (continued)
Most of the programmable settings on the 20-750-ENC-1 are not applicable to a resolver module. However,
the following parameters do affect the operation of the RD750 and must be set correctly.
Z Chan Enable: If this bit is reset to “0”, the RD750 will not generate Marker Events, which indicate
that the resolver position has passed through electrical zero. If set to “1”, Marker Events are generated.
Note that the RD750 always generates Z-pluses on the encoder outputs as well as in the Encoder Status
bits reported to the drive.
Direction: Setting this bit reverses the count direction of the resolver. It is strongly recommended that
you issue a software reset or cycle power to the drive after the count direction is reversed. See addi-
tional notes below.
Encoder PPR: Configures the drive for the number of Pulses Per Revolution (encoder lines) emulated
by the RD750. This parameter must be set to ({Resolver Position Resolution x Resolver Speed} / 4).
Resolver Position Resolution is set by the DIP switches on the RD750. Resolver Speed is an inherent
property of the resolver and is equal to the number of electrical cycles generated per mechanical rota-
tion of the resolver’s shaft. For example, when using 14 bit position resolution and a 2X speed resolver,
the Encoder PPR must be set to ({16,384 x 2} / 4) = 8,192.
Other parameters are emulated by the RD750 so it appears to be a 20-750-ENC-1 module to Rockwell Auto-
mation software. All ENC-1 parameters, and how the RD750 emulates them, are listed in the Option Module
Parameters section starting on page 22.
Additional Notes on Reversing Count Direction
There are two ways to reverse the count direction when using resolvers. The first is to reverse the connec-
tions of the sine winding at the resolver input connector on the RD750. The second method is by setting a
parameter bit in the software configuration registers.
Unlike the quadrature encoder, the resolver is an absolute position device. Because of
this, using either of the two methods to reverse count direction will result in a change in
position value reported to the PowerFlex drive by the RD750. In some cases, this
change in position value may cause erratic movement or behavior when the drive is
commanded to power a motor. Because of this, it is strongly recommended that you
issue a software reset or cycle power to the drive after the count direction is reversed.
Do not, under any circumstances, insert or remove the resolver connector or change
resolver connections while power is applied to the RD750. Doing so may result in a
voltage spike that can damage the reference voltage op-amp.

Introduction to the RD750
ADVANCED MICRO CONTROLS INC.
10
The RD750 (continued)
Status LED’s
As shown in figure 2, two bi-color status LED's on the
RD750 offer visual feedback to simplify troubleshooting.
LED1 shows the status of the connection to the host drive
while LED 2 shows the status of the resolver. Each LED
has several blink patterns that are shown in the following
figures. Each column in the figure represents one eighth of
a second, which means the table shows the LED’s state for
two seconds. For example, Host Connection Lost is indi-
cated by blinking LED1 red at a 1 Hz rate.
LED1: Host Drive Connection State
Figure 3 LED1 (Host Connection) Blink Patterns
Errors in communication with the host may occur if the slot the RD750 occupies is not configured as a Rock-
well Automation 20-750-ENC-1 Single Incremental Encoder Option Module. Errors may also occur due to
environmental conditions such as electrical noise. When an error does occur:
Verify that the slot is configured as a 20-750-ENC-1 Single Incremental Encoder Option Module in
your software
Issue a drive reset command or cycle power to the drive.
If the error still exists, contact AMCI technical support for additional assistance.
Backplane Gold Fingers
LED1
LED2
Figure 2 RD750 Status LED’s
No Active Host Connection
Host Connection Lost
Red LED on When both are on, the LED may
appear to be orange in color.
Green LED on
Both LED’s off
Host Connection Time Out
Data Transfer Overrun
Unsupported Data Size
Host Connection OK
1 Second 1 Second
}

20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786
Tel: [phone] Fax: [phone] http://www.amci.com
Introduction to the RD750
11
The RD750 (continued)
Status LED’s (continued)
LED2: Resolver State
Figure 4 LED2 (Resolver State) Blink Patterns
The Hardware Fault condition can occur at any time. If it does occur, check over the installation and
cabling and reset the card by either issuing a software reset or cycling power to the drive. If the error
remains, contact AMCI technical support for further assistance.
The five red LED blink patterns, Resolver Phase Shift Measurement Fault through Resolver Phase Shift
Fault and Resolver TR Is Higher Than Expected, will only occur when the RD750 is testing the connec-
tion to the resolver on power up. If they occur, check your cable type, cable and resolver wiring, and
resolver specifications and adjust the DIP switch settings as suggested. DIP switch settings are only
read on power up, so you must issue a software reset command or cycle power to the drive before the
RD750 will accept the changes.
Excessive Phase Shift Error should rarely occur, and only if the resolver or cable characteristics change
significantly during drive operation. Consider this a warning of an installation issue or a failure of the
resolver or RD750.
Resolver Fault occurs when there is an error with the resolver signals. The RD750 checks the symme-
try of the sine and cosine voltages as well as their actual values. A resolver fault is typically caused by
cabling issues or improper DIP switch settings on the RD750. In the case of a transient fault, such as
electrical noise on the resolver cable, the Resolver Fault condition will clear itself and begin to transmit
valid data again. The occurrence of the fault is latched and is shown on this status LED as well as by
bits in the backplane data. This bit can be cleared with a Clear Faults command from the drive.
A Resolver Tracking Error may rarely occur during times of apparent extremely high acceleration. The
error is non-fatal and will clear itself once the acceleration rate decreases.
Hardware Fault
When both are on, the LED may
appear to be orange in color.
Red LED on
Green LED on
Both LED’s off
Resolver TR Is Higher Than Expected
(Increase TR setting on RD750)
Resolver Phase Shift Fault and
Resolver TR Is Lower Than Expected
Resolver Phase Shift Fault and
Resolver TR Is Higher Than Expected
Resolver Phase Shift
Measurement Fault
Resolver TR Is Lower Than Expected
(Decrease TR setting on RD750)
Resolver OK
Latched Faults that are now clearable
Excessive Phase Shift Error
Resolver Fault
Resolver Tracking Error
Resolver OK
1 Second 1 Second
}
Start-up Events Only

Introduction to the RD750
ADVANCED MICRO CONTROLS INC.
12
Compatible Sensors
The RD750 is compatible with a broad range of resolvers and variable reluctance transducers including those
listed below that are commonly used in VFD and servo systems.
Table 1 Common Resolver Sensors
Resolver Transmitters
Resolver transmitters have the rotor as their primary winding. The excitation voltage is applied to the primary
and the return signals are read off of the sine/cosine stators. The RD750 is designed to be compatible with all
common 1 kHz to 20 kHz resolver transmitters.
Resolver Control Transformers
Resolver control transformers have the stators as their primary windings. Two voltages are applied to the
resolver that defines an electrical angle. The rotor output voltage and phase is equal to the difference between
the electrical angle supplied through the stators and the mechanical angle of the resolver’s shaft.
When using the RD750, it is possible to operate a control transformer “backwards” by applying the signal to
the rotor and reading the resulting stator waveforms. You must be aware of the following when using con-
trols transformers:
The operating frequency remains the same.
The transformation ratio will not be what is stated on the resolver’s label or its specifications sheet.
Most likely, it won’t even be the reciprocal of the specification. If you have an oscilloscope, you can
easily measure and calculate the TR, or you can use the RD750 to determine settings that will work for
the module.
Positional accuracy will suffer. The final accuracy will depend on the resolver you use, but 10 bit accu-
racy or better (20 min) is typical.
Repeatability, as opposed to accuracy, will remain extremely high, typically ±1 count regardless of your
resolution setting.
Manufacturer Model # Speed Specified
Freq. Specified TR Specified Voltage
AMCI R11X-C10/7 1X 1 kHz 0.45 6.0 Vac
AMCI R11X-J10/7 1X 5 kHz 0.95 7.0 Vac
Moog /
Poly-Scientific JSSB-21-B-02J 1X 6.6 kHz 1.00 7.5 Vac
Reliance/
Tamagawa 800123-2R/ TS-2014N181E32 1X 2.4 kHz 0.45 26 Vac
Reliance/
Tamagawa 800123-2S/ TS-2014N182E32 2X 2.4 kHz 0.45 26 Vac
Reliance/
Tamagawa 800123-2T/ TS-2014N185E32 5X 2.4 kHz 0.45 26 Vac
Reliance/
Tamagawa 800123-R/ TS-2087N1E9 1X 2.4 kHz 0.45 26 Vac
Reliance/
Tamagawa 800123-S/ TS-2087N2E9 2X 2.4 kHz 0.45 26 Vac
Reliance/
Tamagawa 800123-T/ TS-2087N5E9 5X 2.4 kHz 0.45 26 Vac
Reliance/
Tamagawa 800123-1R/ TS-2087N11E9 1X 2.4 kHz 0.45 26 Vac
Reliance/
Tamagawa 800123-1S/ TS-2087N12E9 2X 2.4 kHz 0.45 26 Vac

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Introduction to the RD750
13
Compatible Sensors (continued)
Single and Multi-Speed Resolvers
The most common resolver is known as a single speed resolver. It is manufactured in such a way that one
turn of the resolver’s shaft produces one sinusoidal cycle on the sine and cosine output windings. Multi-speed
resolvers are wound with additional poles so that one rotation of the resolver’s shaft produces multiple sinu-
soidal cycles on the outputs. This is important in three ways in RD750 applications:
Z-Pulse Output: The RD750 Encoder Output emulates the electrical cycles of the resolver. For exam-
ple, if a 5-speed resolver is used, the RD750 will output five Z-pulses for every mechanical rotation of
the resolver’s shaft.
Maximum Position Resolution: The RD750 emulates the 20-750-ENC-1 option module in Rockwell
Automation software. The ENC-1 module has a resolution limit of 80,000 counts per turn. If this value
is exceeded, velocity data and motor commutation angle calculations will be incorrect.
Resolver Tracking Speed: As explained in the following section, Resolver Tracking Speed is the
maximum rotational speed at which the resolver position can still be accurately decoded. This refers to
the rate at which the sinusoidal outputs change, which is the mechanical rotational rate of the resolver’s
shaft multiplied by the resolver’s speed. For example, a 5X speed resolver whose shaft is rotating at a
rate of 2,000 RPM will have an apparent rotational rate of 10,000 RPM (2,000 RPM x 5).
Resolver Tracking Speed
Resolver Tracking Speed is the maximum rotational speed at which the resolver position can still be accu-
rately decoded. Exceeding these speeds can affect positional accuracy. Resolver Tracking Speed is based on
the operating frequency and desired position resolution.
: Maximum operating frequency for 16 bit resolution is 10 kHz
: Maximum operating frequency for 14 bit resolution is 12 kHz
: Maximum operating frequency for 12 and 10 bit resolutions is 20 kHz
Table 2 Resolver Tracking Speeds
A resolver tracking error may be reported by the RD750 during times of apparent extremely high accelera-
tion. The error is rare, non-fatal, and will clear itself once the acceleration rate decreases. The Resolver
Tracking Speed refers to the rate at which the sinusoidal outputs are changing. For single speed resolvers,
this is equal to the rotational rate of the resolver’s shaft. For multi-speed resolvers, this is equal to the rota-
tional rate of the resolver’s shaft multiplied by the speed of the resolver.
Operating
Frequency Position Resolution Resolver Tracking Speed (Single speed resolver)
2.0 to 2.5 kHz OR 16 bit7,500 RPM
3.0 to 5.0 kHz OR 14 bit30,000 RPM
6.0 to 8.0 kHz OR 12 bit60,000 RPM
10.0 to 20.0 kHz OR 10 bit150,000 RPM

ADVANCED MICRO CONTROLS INC.
14
SPECIFICATIONS
Sensor Type
Resolver Transmitters and similar sensors with
sine/cosine stator outputs such as variable 
reluctance transducers.
Number of Resolver Input Channels
One
Installation Locations
Slots 4 or 5 of the PowerFlex 750 backplane
Weight
0.167 lbs. (0.076 kg.) with mating connectors
Input Power
All power is drawn from the 750-Series backplane
Current Draw
+12 Vdc: 145 mA without sensor
170 mA with AMCI R11X-J resolver
240 mA with reference shorted by 5 
(Fault Condition)
–12 Vdc: 60 mA without sensor
90 mA with AMCI R11X-J resolver
160 mA with reference shorted by 5 
(Fault Condition)
+24 Vdc: 10 mA with no load on encoder outputs
Measurement Method
Ratiometric. Compensates for and eliminates most
sources of error, including phase shift, voltage
drift, electrical noise, and temperature changes.
Maximum Cable Length
1000 ft. with proper cable and installation
Belden 9730 recommended for lengths < 100 ft.
Belden 9730 recommended for lengths > 100 ft.
Reference Output Frequency
Programmable from 2 kHz to 20 kHz
Factory Default of 2.5 kHz
Sensor Transformation Ratio
Programmable from 0.15 to 1.75
Factory Default of 0.45
Reference Output Voltage
Set by Sensor Transformation Ratio Setting. 
Programmable from 3.75 to 15.0 Vrms
Factory Default of 10.30 Vrms
Reference Output Current
50 mArms maximum
Resolver Position Resolution
10, 12, 14, or 16 bits per turn. (1,024, 4,096 16,384
or 65,536 steps over a single turn)
Factory Default of 14 bits per turn
Encoder Resolution
Set by Resolver Position Resolution setting
Encoder Output Type
Differential. Jumper selectable to 5 or 12 Vdc
Encoder Output Current
25 mA per channel
Environmental Specifications
Ambient Operating Temperature
........... 0° to 50° C (32° to 122° F)
Storage Temperature
........... -40° to 70° C (-40° to 158° F)
Product designed for operation in EN 61800-5-1
Pollution Degree 1 and 2 environments
Status LED’s
See Status LED’s starting on page 10
Connectors
Mating connectors are included with the RD750
and are available separately under the following
AMCI part numbers
Assuming a single-speed resolver. Multi-speed
resolvers will produce these counts over a single
electrical cycle of the resolver’s outputs. Care in pro-
gramming must be exersiced to ensure the total num-
ber of counts per mechanical rotation do not exceed
80,000 counts.
Connector AMCI Part # Wire Strip Length Max. Tightening Torque Weidmueller #
Resolver MW-9 28 - 14 AWG 0.236" (6 mm) 2.21 lb-in (0.25 Nm) 1615710000
Encoder MW-7 28 - 14 AWG 0.236" (6 mm) 2.21 lb-in (0.25 Nm) 1610190000

20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786
Tel: [phone] Fax: [phone] http://www.amci.com 15
INSTALLING THE RD750
Setting Encoder Jumper and DIP Switches
RD750 Orientation
Figure 5shows you how the card must be ori-
ented before using the rest of this section to set
the encoder jumper and the bank of DIP switches
that configure the resolve interface. The figure
also shows the location of the jumper and the
bank of DIP switches.
In this orientation, the white silkscreen writing on
the RD750 is upside down. However, this orien-
tation makes the DIP switches follow a binary
pattern, and this is the orientation that the RD750
will have once it is installed in the drive.
Setting the Encoder Jumper
The encoder jumper selects the output voltage of the encoder
signals generated by the RD750. The two choices are 5 Vdc
or 12 Vdc outputs. Figure 6is a close up of the Encoder
Jumper. This image shows the two pin jumper on the pins
that select the 5 Vdc outputs. This setting is the factory
default. To make the encoder outputs operate at 12 Vdc,
move the two pin header to the “12V” and center pins.
Verify the input voltage range of any
equipment you attach to the encoder
outputs. Operating the encoder outputs
at 12 Vdc can potentially damage equip-
ment that is designed for a 5 Vdc signal.
If the jumper is missing, the encoder outputs
will operate at 5 Vdc.
Figure 5 RD750 Orientation
Figure 6 Encoder Output Voltage Jumper

Installing the RD750
ADVANCED MICRO CONTROLS INC.
16
Setting Encoder Jumper and DIP Switches (continued)
DIP Switch Settings
Figure 7below shows the DIP Switch settings for selecting the resolver and encoder resolution, the reference
frequency, and the resolver’s transformation ratio.
Figure 7 DIP Switch Settings
Toggle switches are white. Image
to the right shows all switches in
the off (Logic 0) position.
10 bit (1,024 counts/turn)
Reserved
Reserved
0.61 to 1.751.18
0.49 to 1.501.00
0.40 to 1.250.83
0.35 to 1.070.71
0.30 to 0.940.62
0.27 to 0.840.56
0.24 to 0.750.50
0.22 to 0.680.45
0.20 to 0.630.42
0.19 to 0.580.39
0.17 to 0.540.36
0.16 to 0.500.33
0.15 to 0.470.32
3.5 kHz
4.70 Vrms
7.0 kHz
8.45 Vrms
14.0 kHz
12.20 Vrms
12 bit (4,096 counts/turn)
2.0 kHz
Reserved
4.0 kHz
5.65 Vrms
8.0 kHz
9.40 Vrms
15.0 kHz
13.15 Vrms
14 bit (16,384 counts/turn)
2.5 kHz
Reserved
5.0 kHz
6.60 Vrms
10.0 kHz
10.30 Vrms
17.5 kHz
14.10 Vrms
16 bit (65,536 counts/turn)
3.0 kHz
3.75 Vrms
6.0 kHz
7.50 Vrms
12.0 kHz
11.25 Vrms
20.0 kHz
15.00 Vrms
2 kHz to 20 kHz
2 kHz to 20 kHz
2 kHz to 12 kHz
2 kHz to 10 kHz
Backplane Gold Fingers
LED1
SW1
LED2
Reference
Frequency
Resolver and Encoder
Position Resolution
Resulting
Reference Voltage
TR
Range
Optimal
TR
Reference
Frequency Range

20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786
Tel: [phone] Fax: [phone] http://www.amci.com
Installing the RD750
17
Setting Encoder Jumper and DIP Switches (continued)
Settings for Common Resolvers
Maximum Resolution is based on the 20-750-ENC-1 limit of 80,000 counts per turn. Exceeding this value
will cause errors in velocity feedback and the motor commutation angle calculations. Total counts from a
resolver equals the resolution multiplied by the speed of the resolver. For 2X resolvers, the maximum total
count is 214 X 2 = 32,768. For 5X resolvers, the maximum total count is 212 X 5 = 20,480.
Operating at 3.0 kHz instead of 2.5 kHz increases the Resolver Tracking Speed from 3,750 RPM to 15,000
RPM for 2X speed resolvers. See Resolver Tracking Speed on page 13 for more information.
Operating at 3.0 kHz instead of 2.5 kHz increases the Resolver Tracking Speed from 1,500 RPM to 6,000
RPM for 5X speed resolvers. See Resolver Tracking Speed on page 13 for more information.
Table 3 Suggested Settings for Common Resolvers
Determining Settings for Other Resolvers
Frequency Setting
For most applications, simply determine your resolver’s rated operating frequency and choose the closest
available setting on the RD750. This includes using the 2 kHz setting for any resolver that has an operating
frequency rating of 1 kHz to 2 kHz. (The RD750 is not compatible with 400 Hz resolvers.) Generally speak-
ing, a ±20% shift in operating frequency will have a negligible effect on the resolver’s outputs.
RD750
Suggested Settings
Manufacturer Model # Speed Specified
Freq. Specified TR Specified Voltage Reference Frequency TR Setting Maximum
Resolution
(bits)
AMCI R11X-C10/7 1X 1 kHz 0.45 6.0 Vac 2 kHz 0.45 16
AMCI R11X-J10/7 1X 5 kHz 0.95 7.0 Vac 5 kHz 1.00 16
Moog /
Poly-Scientific JSSB-21-B-02J 1X 6.6 kHz 1.00 7.5 Vac 7 kHz 1.00 16
Reliance/
Tamagawa 800123-2R/ TS-2014N181E32 1X 2.4 kHz 0.45 26 Vac 2.5 kHz 0.45 16
Reliance/
Tamagawa 800123-2S/ TS-2014N182E32 2X 2.4 kHz 0.45 26 Vac 3.0 kHz

0.45 14
Reliance/
Tamagawa 800123-2T/ TS-2014N185E32 5X 2.4 kHz 0.45 26 Vac 3.0 kHz

0.45 12
Reliance/
Tamagawa 800123-R/ TS-2087N1E9 1X 2.4 kHz 0.45 26 Vac 2.5 kHz 0.45 16
Reliance/
Tamagawa 800123-S/ TS-2087N2E9 2X 2.4 kHz 0.45 26 Vac 3.0 kHz

0.45 14
Reliance/
Tamagawa 800123-T/ TS-2087N5E9 5X 2.4 kHz 0.45 26 Vac 3.0 kHz

0.45 12
Reliance/
Tamagawa 800123-1R/ TS-2087N11E9 1X 2.4 kHz 0.45 26 Vac 2.5 kHz 0.45 16
Reliance/
Tamagawa 800123-1S/ TS-2087N12E9 2X 2.4 kHz 0.45 26 Vac 3.0 kHz

0.45 14

Installing the RD750
ADVANCED MICRO CONTROLS INC.
18
Setting Encoder Jumper and DIP Switches (continued)
Determining Settings for Other Resolvers (continued)
TR Setting for Transmitter Resolvers
Referring back to figure 7, DIP Switch Settings on page 16, the “Optimal TR” column is the median value of
the range listed in the “TR Range” column. If your resolver’s TR falls within the listed range, the setting will
work with the RD750. For example, if your resolver has a TR of 0.45, any “Optimal TR” setting in the table
from 0.83 to 0.32 will work, but the setting that is optimized for 0.45 gives the RD750 the widest range of
adjustment to compensate for variations in the resolver’s TR.
Note that the TR setting also sets the value of the RD750’s reference voltage. Operating a resolver at a volt-
age below its specified value never affects the accuracy of the resolver. Operating a resolver at a voltage
above its specified value rarely affects the accuracy of the resolver and this only occurs if the input power sat-
urates the cores of the resolver. The RD750’s Analog Buffer minimizes the risk of this happening when you
operate the resolver above its specified reference voltage. If you have concerns about operating your resolver
at a higher reference voltage, you can choose your TR setting based on the reference voltage. However, the
TR of your resolver must fall within the TR Range listed for that reference voltage.
TR Setting for Control Transformer Resolvers
Determining the TR setting for a control transformer resolver requires powering the system and either mea-
suring the resolver signals or using the resolver status LED as feedback. For now, set the TR DIP switches to
a value of 0.5. The procedure for setting the TR of a control transformer resolver is presented at the end of
this chapter in the Determining the TR Setting of a Control Transformer Resolver section starting on page
21.

20 Gear Drive, Plymouth Ind. Park, Terryville, CT 06786
Tel: [phone] Fax: [phone] http://www.amci.com
Installing the RD750
19
Installing the RD750
Installation of the RD750 follows the same procedure shared by all Allen-Bradley option modules:
1) Firmly press the module edge connector into the desired port. Note that the RD750 can only be
installed in ports 4 or 5.
2) Tighten the top and bottom retaining screws.
Recommended torque = 4.0 lb•in (0.45 N•m)
Recommended screwdriver = T15 Hexalobular
Important: Do not over-tighten retaining screws.
Figure 8 Installing the RD750

Installing the RD750
ADVANCED MICRO CONTROLS INC.
20
Wiring the Resolver Input
Do not, under any circumstances, insert or remove the resolver connector or change
resolver connections while power is applied to the RD750. Doing so may result in a
voltage spike that can damage the reference voltage op-amp.
When wiring the resolver to the RD750, cabling suggestions from your resolver’s manufacturer should be fol-
lowed with the possible exception of grounding the cable shield at the resolver. The RD750 connects the
shields of the cable to the chassis of the PowerFlex drive, and grounding the cable shields at the resolver or at
any cable junction can lead to ground loops that may affect system performance.
If your resolver’s manufacturer does not recommend an extension cable, AMCI suggests Belden 9873 for
cable lengths less than 100 feet, or Belden 9730 for any length. These cables are low capacitance cables with
three individually shielded twisted pairs. They have been used in thousands of AMCI installations without
issue. Figure 9below shows how to wire the Belden 9873 or 9730 cable to the resolver input connector on
the RD750.
Figure 9 Resolver Input Wiring
Reversing Count Direction
There are two ways to reverse count direction. One option is with the “Direction” configuration data bit. The
other is by reversing the ±SIN (S2-S4) connections on the resolver input connector. In figure 9above, you
would reverse the connections of the WHT/BLK pair.
Encoder Output Wiring
Figure 8 below shows the suggested wiring from the encoder output connector of the RD750 to your equip-
ment. Belden 9873 and 9730 are the same cables suggested for use as the resolver extension cables. Alpha
6053C and 6317 are the three pair versions of the cables suggested by Rockwell Automation for use with
their incremental encoders.
Figure 10 Encoder Output Wiring
REF+
REF–
SHLD
SIN+
S4
S2
S3
S1
R1 BLK
R2 RED SHILEDS
GRN
BLK
WHT
SHIELD
BLK
SHIELD
SIN–
SHLD
COS+
COS–
SHLD
R2 (Blk/Wht)
Rotary
Transformer
Belden 9873, 9730 or exact equivalents.
For cable lengths greater than 100' (30 meters) use
Belden 9730 or exact equivalent.
A+
A–
B+
B–
WHT A+
BLK A–
RED B+
GRN Z+
BLK Z–
SHIELDS
BLK B–
Z+
Z–
SHLD
Belden 9873, Alpha 6053C or exact equivalents.
For cable lengths greater than 100' (30 meters) use
Belden 9730, Alpha 6317 or exact equivalents.
Connected
Equipment