Information furnished by Control Techniques Drives Inc. (Control Techniques) is believed to be
accurate and reliable. However, no responsibility is assumed by Control Techniques for its use.
Control Techniques reserves the right to change the design or operation of the equipment described
herein and any associated motion products without notice. Control Techniques also assumes no
responsibility for any errors that may appear in this document. Information in this document is subject
to change without notice.
reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose,
without the express written permission of Control Tech niques.
The following are trademarks of Control Techniques and may not be reproduced in any fashion
without written approval of Control Techniques: EMERSON Motion Co ntrol,
EMERSON Motion Control PowerTools, AXIMA, “Motion Made Easy.”
Control Techniques is a division of EMERSON Co.
Control Techniques, Inc. is not affiliated with Microsoft Corporation, owner of the Microsoft,
Windows, and Windows NT tr ademarks.
This document has been prepared to conform to the current released version of the product. Because
of our extensive development efforts and our desire to further improve and enhance the product,
inconsistencies may exist between the product and documentation in some instances. Call your
customer support representative if you encounter an inconsistency.
ii
Customer Support
Control Techniques
12005 Technology Drive
Eden Prairie, Minnesota 55344-3620
U.S.A.
Telephone: (952) 995-8000 or (800) 893-2321
It is Control Techniques’ goal to ens ure your g reatest poss ible satisfacti on with the o peration
of our products. We are dedicated to providing fast, friendly, and accurate assistance. That is
why we offer you so many ways to get the support you need. Whether it’s by phone, fax or
modem, you can access Control Techniques support in for mation 2 4 ho urs a day, seve n days
a week. Our wide range of services include:
FAX (952) 995-8099
You can FAX questions and comments to Control Techniques. Just send a FAX to the number
listed abov e.
Website and Emailwww.emersonct.com
Website: www.emersonct.com
Email: info@emersonct.com
If you have Internet capabilities, you also have access to technical support using our website.
The website includes technical notes, frequently asked questions, release notes and other
technical documentation. This direct tec hnical support conn ection lets you reques t assistance
and exchange software files electronically.
Technical Support(952) 995-8033 or (800) 893-2321
Email: service@emersonct.com
Control Techniques’ “Motion Made Easy” products are backed by a team of professionals
who will service your installation. Our technical support center in Eden Prairie, Minnesota is
ready to help you solve those occasional problems over the telepho ne. Our technical support
center is available 24 hours a day for emergency service to help speed any problem solving.
Also, all hardware replacement parts, if needed, are available through our customer service
organization.
When you call, please be at your co mputer, with your documentation easily av ailable, and be
prepared to provide the following information:
•Product version number, found by choosing About from the Help menu
•The type of controller or product you are using
iii
•Exact wording of any messages that appear on your screen
•What you were doing when the problem occurred
•How you tried to solve the problem
Need on-site help? Control Techniques p rovides service, in most cases, the n ext day. Just call
Control Techniques’ technical support center when on-site service or maintenance is
required.
Training Services(952) 995-8000 or (800) 893-2321
Email: training@emersonct.com
Control Techniques maintains a highly trained staff of instructors to familiarize customers
with Control Techniques’ “Motion Made Easy” products and t heir applications. A number of
courses are offered, many of which can be taught in your plant upon request.
Application Engineering(952) 995-8000 or (800) 893-2321
Email: applengr@emersonct.com
An experienced staff of f actory application engineers provides complete customer support for
tough or complex applications. Our engineers offer you a broad base of experience and
knowledge of electronic motion control applications.
Customer Service (Sales)(952) 995-8000 or (800) 893-2321
Email: customer.service@emersonct.com
Authorized Control Techniques distributors may place orders directly with our Customer
Service department. Contact the Customer Service department at this number for the
distributor nearest you.
Document Conventions
Manual conventions have been established to help you learn to use this manual quickly and
easily. As much as possible, these conventions correspond to those found in other Microsoft®
Windows® compatible software documentation.
Menu names and options are printed in bold type: the File menu.
Dialog box names begin with uppercase letters: the Axis Limits dialog box.
Dialog box field names are in quotes: “Field Name.”
Button names are in italic: OK button.
Source code is printed in Courier font: Case ERMS.
iv
In addition, you will find the following typographic conventions throughout this manual.
EN
ThisRepresents
bold
italic
ALL CAPITALSDirectory names, file names, key names, and acronyms.
SMALL CAPSNon-printable ASCII control characters.
KEY1+KEY2
example: (Alt+F)
KEY1,KEY2
example: (Alt,F)
Characters that you must type exactly as they appear. For example, if you are directed to type
a:setup, you should type all the bold characters exactly as they are printed.
Placeholders for information you must provide. For example, if you are directed to type
filename, you should type the actual name for a file instead of the word shown in italic type.
A plus sign (+) between key names means to press and hold down the first key while you press
the second key.
A comma (,) between key names means to press and release the keys one after the other.
Note
For the purpose of this manu al and prod uct, “Note” indicates es sential information about
the product or the respective part of the manual.
EN Only
For the purpose of this manu al and product, the “E N” symbol indicates information about
the EN drive specifically.
Throughout this manual, the word “drive” refers to an EN or MDS drive.
“Warning” indicates a potentially hazardous situation that, if not avoided , could re sult in
death or serious injury.
“Caution” indicates a potentially hazardous situation that, if not avoided, may result in
minor or moderate injury.
“Caution” used without the safety alert symbol indicates a potentially hazardous situation
that, if not avoided, may result in property damage.
v
Safety Instructions
General Warning
Failure to follow safe installation guidelines can cause death or serious injury. The voltages
used in the product can cause severe electr ic shock and/or burns and could be lethal. Extreme
care is necessary at all times when working with or adjacent to the product. The installation
must comply with all relevant safety legislation in the country of use.
Qualified Person
For the purpose of this manual and product, a “qualified person” is one who is familiar with
the installation, construction and operation of the equipment and the hazards involved. In
addition, this individual has the following qualifications:
•Is trained and authorized to energize, de-energize, clear and ground and tag circuits and
equipment in accordance with established safety practices.
•Is trained in the proper care and use of protective equipment in accordance with
established safety practices.
•Is trained in rendering first aid.
Reference Materials
The following related reference and installation manuals may be useful with your particular
system.
•Epsilon Eb and EN Drives Reference Manual (P/N 400501-01)
•PowerTools Software User’s Guide (P/N 400503-01)
•FM-3 and FM-4 Connectivity Modules Reference Manual (P/N 400508-04)
•Modular Drive System (MDS) Reference Manual (P/N 400525-01)
vi
Safety Considerations
Safety Precautions
This product is intended for professional integration into a complete system. If you install the
product incorrectly, it may present a safety hazard. The product and system may use high
voltages and currents, carry a high level of stored electrical energy, or control mechanical
equipment that can cause injury.
You should give close attention to the electrical installation and system design to avoid
hazards either in normal operation or in the event of equipment malfunction. Sy stem des ign,
installation, commission ing and mai ntenance mu st b e carried out by per sonnel wh o have t he
necessary training and experience. Read and follow this safety information and the ins truction
manual carefully.
Enclosure
This product is intended to be mounted in an enclosure which prevents access except by
trained and authorized personnel, and which prevents the ingress of contamination. This
product is designed for use in an environment classified as pollution degree 2 in accordance
with IEC664-1. This means that only dry, non-conducting contamination is acceptable.
Setup, Commissioning and Main tenan ce
It is essential that you give careful consideration to changes to drive settings. Depending on
the application, a change could have an impact on safety. You must take appropriate
precautions against inadvertent changes or tampering. Restoring default parameters in certain
applications may cause unpredictable or hazardous operation.
Safety of Machinery
Within the European Union all machinery with which this product is used must comply with
Directive 89/392/EEC, Safety of Machinery.
The product has been designed and tested to a high standard, and failures are very unlikely.
However the level of integrity offered by the product’s control function – for example stop/
start, forward/reverse and maximum speed – is not sufficient for use in safety-critical
applications without additional independent channels of protection. All applications where
malfunction could cause injury or los s of life mu st be subject to a risk as sessment, and f urther
protection provided where needed.
General warning
Failure to follow safe inst allation guide lines can c ause death or serious in jury. The v oltages used in
this unit can cause severe electric shock and/or burns, and could be lethal. Extreme care is necessary
at all times when workin g with or adja cent to this equ ipment. The in stallation must comply with all
vii
relevant safety legislation in the country of use.
AC supply isolation device
The AC supply must be removed from the drive using an approved isolation device or discon nect
before any servicing work is performed, other than adjustments to the settings or parameters
specified in the manual. The driv e contain s capacito rs which re main charge d to a p otentially lethal
voltage after the supply has been removed. Allow at least 3 minutes after removing the supply
before carrying out any work which may in volve contact with electrical connections to the drive.
Products connected by plug and sock et
A special hazard may exist where the drive is incorporated into a product which is connected to the
AC supply by a plug and s ocket. When unplugged, the pins of the plug may be connected to t he
drive input, which is only separated from the charge stored in the bus capacitor by semiconductor
devices. To avoid any possibility of electric shock from the pins, if they are accessible, a means
must be provided for automatically disconnecting the plug from the drive (that is, a latching
contactor).
Grounding (Earthing, equipotential bonding)
The drive must be grounded by a conductor sufficient to carry all possible fault current in the event
of a fault. The ground connections shown in the manual must be followed.
Fuses
Fuses or over-current protection must be provided at the input in accordance with the instructions
in the manual.
Isolation of control circuits
The installer must ensure that the exte rnal control circuits are isolated from human contact by at
least one layer of insulation rated for use at the applied AC supply voltage.
The FM-3 module is a compact and rugged function module that attaches to the front of the
drive. It provides eight digital input lines and four digital output lines, in addition to the four
input and three output lines available on the drive.
Unlike other function modules, the FM-3 module offers complex motion profiling. A
complex motion profile consists of two or more indexes that are executed in sequence such
that the final velocity of each index except the last is non-zero. Logical instructions between
index statements can provide a powerful tool for altering motion profiles "on the fly". The
FM-3 module defines complex motion by a configuration file that includes setups, function
assignments and programs. The co nfiguration file is created using PowerTools Pro software
Setup views have the same look and feel as dialog boxes. The wiring of input and output
functions is done through assignments in the software . PowerTools Pro is an easy-to-use
Microsoft® Windows® based setup and diagnostics tool.
1
.
Figure 1: EN Drive with FM-3 Function Module
Note that the drive’s firmware is disabled whenever a Function Module such as the FM-3
module is attached. Therefore, if the drive’s hardware is FM compatible, then the drive’s
firmware can be any version because the programming features reside in the function
module’s flash memory. Flash files used for firmware up grades are available on the Control
Techniques webpage.
The FM-3 module stores drive setup parameters within the module itself. This allows you to
transfer the FM-3 module to another drive without losing setup parameters.
1.In this manual, Emerson Mot io n Control PowerTools Pro software will be referred to as PowerTools Pro.
1
FM-3 Programming Module Reference Manual
Figure 2:FM-3 Programming Module Features
2
FM-3 Programming Module Reference Manual
Operational Overview
This section provides a complete functional description of the FM-3. It is intended to provide
you with a thorough understanding of all operations. The description includes references to
many FM-3 module and drive parameters which can be displayed and/or edited using
PowerTools Pro software, or through any Modbus interface.
The FM-3 module augments the drive by providing the ability to implement programs written
using PowerTools Pro. When a FM-3 module is attached to an drive, it overrides the operation
and user accessible features of th e d rive. The dr ive’s b asic oper ating mod es (Puls e, Velocity
and Torque) are not available when a FM-3 module is attached.
The FM-3 module stores drive setup parameters within the module itself. This allows you to
transfer the FM-3 module to another drive without losing setup parameters.
The FM-3 module allows you to set up 55 different indexes, Jog functions and multiple
Homes. It also provides eight digital input lines and four digital output lines in addition to the
four input and three output lines available on the drive.
Software Interface
The FM-3 module is set up using PowerTools Pro software. PowerTools Pro is an easy-to-use
Windows® based setup and diagnostics tool. It provides you with the ability to create, edit
and maintain your drive’s setup. You can download or upload your setup data to or from a
device. You can also save it to a file on your PC or print it for review or permanent storage.
PowerTools Pro Setup Software
PowerTools Pro is designed to be the easiest to use software available for single axis motion
controllers.
Features
•“Hierarchy View” for quick navigation to any setup screen
•Simple I/O function assignments
•Powerful online diagnostic capabilities
•Programming
3
FM-3 Programming Module Reference Manual
Figure 3:Hierarchy View
The “Hierarchy View” (shown above) contains expandable groups of parameters. The groups
can be expanded and contracted just like folders in Windows Explorer. Left clicking on a
view name in the Hierarchy view displays that View on the righ t side of the computer screen.
To setup a drive the user simply steps through the Hierarchy View from top to bottom.
Simple applications can be setup i n a matter of minutes. Man y of the views have Assignment
tabs that display the assign ments pertaining to the vi ew (i.e. on the Position view, t he position
assignments are displayed).
Keypad Interface
The keypad on the fron t of the FM-3 modul e provides navig ation through a menu of common
parameters and displays of current functions. Navigation through the menu is accomplished
with the six keys located below the display. The top two keys are called the "soft keys"
because they relate to the commands lo cated directly above each key on the LCD. These keys
are used to select the operation (e.g. Modify, Ok, C ancel), parameter group, an d/or to validate
information. The four arrow keys are used to navigate through parameter groups, select a
specific parameter to be modified, and to modify digital and numeric data.
The operation of the arrow keys is dependent upon the type of parameter which is being
modified.
4
Figure 4:FM-3 Display Screen and Keypad
Operation al Overview
On the Menu screen, the drive type and axis address are always shown on the top line of the
display. The second line shows the motor type. If a user defined motor is selected, the user
defined motor name will appear. The third line shows two parameter group names, one above
each of the soft keys.
From the Menu screen, the user selects a group of dr ive parameters to work with. The g rou p
names are scrolled using the left/right direction keys. The groups correspond roughly to the
tabs used by the PowerTools software. The groups are shown cyclically and wrap around.
The drive parameters available with the FM-3 keypad are arran ged into seven groups (see list
below). Upon power-up the FM-3 module will display the default parameter groups
“SECUR” (left soft key) and “QUICK” (right soft key).
•QUICK (Quick)
•PROG (Program)
•INDEX (Index)
•HOME (Home)
•JOG (Jog)
•RAMPS (Ramps)
•SECUR (Security)
5
FM-3 Programming Module Reference Manual
Security: 1
EN-204 Adr01
MG-316
SECUR
Menu
Screen
PBus-
Group
Slave Address
MODIF MENU
Security: 1
Baud Rate
MENU
Security: 0
Network Sts
MENU
Security: 0
Module Sts
MODIF MENU
Security: 0
MasterAddr
MENU
Security: 0
MsgProcessed
MENU
Security: 0
DVNET+
Group
MacID
MODIF MENU
Security: 1
Baud Rate
MODIF MENU
Security: 1
Security: 1
Network Sts
MENUMODIF
Security: 0
Module Sts
MENU
Security: 0
Net OK
MENU
Security: 0
Conn Type
MENU
Security: 0
Mster MacID
MENU
Security: 0
Transmit Cntr
MENU
Security: 0
Receive Cntr
MENU
Security: 0
SECUR
Group
Auto Log Out
MODIF MENU
Security: 3
Password 1
MODIF MENU
Security: 3
RAMPS
Group
Stop
MODIF MENU
Security: 0
Stop.Decel
MODIF MENU
Security: 1
Password 2
MODIF MENU
Security: 3
Log Out Now?
OK
Security: 0
* Jog Group contains 2 Jogs (Jog.0 and Jog.1)
Index Group contains 7 Indexes (Index.0 to Index.7)
Prog Group contains 4 Programs (Prog.0 to Prog.3)
JOG*
Group
<Jog.0.Vel>
MODIF MENU
Security: 1
<Jog.0.Accl>
MODIF MENU
Security: 1
<Jog.0.Decl>
MODIF MENU
Security: 1
<Jog.0.Plus>
MODIF MENU
Security: 1
<Jog.0.Mius>
MODIF MENU
Security: 1
Posn Fdbk Ct
MENU
Security: 0
HOME
Group
Home.0.Vel
MODIF MENU
Security: 1
Home.0.Accl
MODIF MENU
Security: 1
Home.0.Decl
MODIF MENU
Security: 1
Home.0.Init
MODIF MENU
Security: 1
Calc Offset
MENU
Security: 1
Spec Offset
MODIF MENU
Security: 1
Select Offst
MODIF MENU
Security: 1
+ DeviceNet Group is only available on FM-3DN and FM-4DN modules
- Profibus Group is only available on FM-3PB and FM-4PB modules
On all screens with < > symbols, scroll left and right to select the specific Instance
INDEX*
Group
<Ind.0.Vel>
MODIF MENU
Security: 1
<Ind.0.Accl>
MODIF MENU
Security: 1
<Ind.0.Decl>
MODIF MENU
Security: 1
<Ind.0.Dist>
MODIF MENU
Security: 1
<Ind.0.Init>
MODIF MENU
Security: 1
PROG*
Group
<Prg.0.Init>
MODIF MENU
QUICK
Group
Posn Fdbk
GRAPH MENU
Security: 0
Vel Fdbk
GRAPH MENU
Security: 0
Following Er
GRAPH MENU
Security: 0
Axis Address
MODIF MENU
Security: 0
Baud Rate
MODIF MENU
Security: 3
DriveInput
MENU
Security: 0
ModuleInput
MENU
Security: 0
DriveOutput
MENU
Security: 0
ModuleOutput
MENU
Security: 0
Fault Sts 1
MENU
Security: 3
Fault Sts 2
MENU
Security: 0
Clear Fault?
OK MENU
Security: 0
Module Rev
MENU
Security: 0
Boot Rev
MENU
Security: 0
Parameter Screens
After selecting a group using one of the soft keys, the FM-3 module will display a Parameter
screen for that group. This screen co uld be either the first screen in the group or the last screen
you used in that group. The FM-3 module keeps track of the last Parameter screen viewed in
6
each group and returns to that screen when you come back to the group. This is reset on
power-up and the FM-3 keypad displays the first Parameter screen in the group.
In this screen, the parameter name is shown on the first line of the display. The up/down arrow
keys are used to scroll through the parameters available in the selected group.The second line
displays the condition or value of parameters. The third line displays the soft key actions.
The left/right arrow keys are used to scroll through the parameters when the “<“ and “>”
symbols are shown.
Numeric parameter units are sometimes shown before the actual value, because the parameter
value and the units cannot be displayed on one line. The unit of measure will appear on the
second line for about one second. Then the actual parameter value will appear. The parameter
value is updated about five times a second.
How Motion Works
The FM-3 module provides four types of motion: jogging, homing, indexing, and gearing.
Only one index, jog, home, or gear may be in process at any given moment (exclusionary
motion types). Through assignments and programs, the FM-3 module can sequentially run
various motion routines. The Positive direction parameter affects all motion types by
specifying which direction of motor revolution (CW or CCW) is considered motion in the “+”
direction.
How Jogging Works
Operation al Overview
Jogging produces rotation of the motor at controlled velocities in a positive or neg a tive
direction.
Assignments to jogs are level sensitive such that when the jog input is turn ed on, jogging
begins and continues jogging until the jog input is removed .
Each jog has its own acceleration and deceleration ramp along with a specified velocity.
Jogging has no distance parameter associated with it. If trying to move a specific distance
or to a known position, then an index is used.
7
FM-3 Programming Module Reference Manual
Figure 5:Jog Tab
How Home Works
The Home is used in applications in which the axis must be precisely aligned with some part
of the machine. The Home is initiated in one of three ways: with the Initiate Destination
function found in the Assign ments view, through a pr ogram, or with the Online t ab. A Home
or Define Home is required to set the Absolute Position Valid so that any ind e x to absolute
position can work.
The FM-3 module can home the motor to an external sensor, the motor’s encoder marker
pulse, or to a sensor and then to the encoder marker pulse.
8
Figure 6:Basic Home Function, Example
The figure above show a basic home function us ing a ball screw. This example uses most of
the setup features in the PowerTools Pro Home tab.
Home Sequence
1.Back off the sensor (if on the sensor. This step is optional).
Operation al Overview
2.Move to the external home sensor to establish a home reference point.
3.Next it will move to the Offset position.
4.Then the command and feedback positions are set to the value entered into the End of
Home Position.
Homing to the motor’s encoder marker will establish the most accurate and repeatable home
position. This method will position the motor relative to the location of the rising edge of the
encoder marker pulse. Most applications will use a sensor and marker to find an accurate
home position in the vicinity of the home sensor.
Several parameters affect how the Home function operates. Each of these parameters are
explained in detail on the following pages.
Note
The Home function will NOT be initiated when any other mot ion command is in progress.
Establishing a Home Reference Position
The first step in setting up a home is to select the desired home reference type. The Home
Reference parameter selected determines how the Home Reference Position is established.
9
FM-3 Programming Module Reference Manual
PowerTools Pro allow s selection of on e of three different Hom e References: Sensor, Marker,
or Sensor and Marker.
Sensor
Selecting Sensor means the rising edge of the Home Sensor input functi on is used to establish
the home reference position.
Figure 7:Sensor Home Reference Position
Marker
Selecting Marker means the rising edge of the motor’s encoder marker channel is used to
establish the reference position.
10
Figure 8:Marker Home Reference Position
Sensor and Marker
Selecting Sensor and Marker means the reference position is established using the firs t
marker rising edge after the device sees the rising edge of the Home Sensor input function.
Figure 9:Sensor and Marker Home Reference Position Example 1
Accuracy and Repeatability
The amount of accuracy your application requires will determine the Home Reference option
you select. Homing to an external sensor only will establish a repeatable home position within
0.04 revolutions at 3000 RPMs (800 µsec sensor capture interval).
Operation al Overview
Note
The data above assumes the use of a perfectly repeatable home sensor.
In Sensor and Marker applications, the marker mus t be at least 800 µsec after the rising edge
of the sensor input to be considered a valid marker pulse.
Note
At 1000 RPM, the motor will travel 0.0133 revolutions (or 4.8°) in 800 µsec.
11
FM-3 Programming Module Reference Manual
Sensor Min.
800 µsec
Sensor
Marker
Direction of Travel
Figure 10:Sensor and Ma rker Home Re ference Po si tion Example 2
The Home Sensor must be “On” for at least 800 µsec to guarantee that it will be recognized.
Sensor
On Time
Home Offset
12
800 µsec
Figure 11:Sensor and Ma rker Home Re ference Po si tion Example 3
The Home Offset is the distance from the Reference Position to the final stopping point at the
end of the homing sequence. Regardless of the value you enter for the Offset or which Home
Reference you choose, there is always an offset inherent in the homing process.
The user may either specify a desired offset or allow the drive to calculate an offset
automatically. The drive calculates an offset that guarantees that the motor will not have to
backup to get to the offset position. This is very convenient for unidirectional applications.
The calculated offset is the distance travelled during deceleration ramp from the home
velocity to a stop plus the distance travelled at the home velocity for 800 µsec. This extra
distance is used to guarantee that the motor will not need to backup after the deceleration
ramp.
Operation al Overview
Calculated
The Specified Offset allows the user to choose an exact offset from the Home Reference.
Once the home reference is detected, the device will do whatever is necessary to reach the
offset position. This may be as simple as a deceleration to a stop, a continuation at speed
followed by a deceleration to a stop, or a deceleration followed by a move in the opposite
direction.
To enter a specified home offset, select the Specifi ed Offs et radio butt on. PowerTo ols Pro
always displays the calculated offset value as a reference. If the home reference is detected
before the axis has reached its peak velocity, the axis will still continue to the precise off set
position.
Figure 12:Calculated Home Offset, Peak Velocity Not Reached
If the Home Reference is detected after the axis has reached its peak velocity, the axis will
decelerate to the precise offset position.
Home Offset
Figure 13:Calculated Home Offset, Peak Velocity Reached
13
FM-3 Programming Module Reference Manual
Two examples below show operation when the specified offset is greater or less than the
calculated offset. This causes the axis to continue on at speed before decelerating and
stopping at the offset position, or backing up after the home sensor.
Figure 14:Specified Home Offset, Greater than Calculated Offset
Specified
Offset
Specified
Offset
Figure 15:Specified Home Offset, Backup Required
End of Home Position
The End of Home Position (End Posn) defines the home position in relation to the machine’s
coordinate system. At the completion of the home, the value of the End of Home Position is
put into the command position.
14
Home Limit Distance
This parameter places an upper limit on the incremental distance the motor will travel during
the home.
If no reference is found, the system will decelerate and stop at the limit distance. The Home
Limit Distance Hit function will be activated if the home stops at the limit distance witho ut
finding the reference. Additionally, the Home.CommandComplete function will not turn
“On” if the limit distance is hit.
Home Examples
Example 1: Linear Application
In this example, the system uses an external sensor and the motor’s encoder marker channel
to establish a Home Reference Position. This is the most accurate and most common way to
home.
Operation al Overview
Figure 16:Home to Sensor and Mark er, Example
When the FM-3 module sees the Home Initiate, it accelerates the motor to the Home Velocity.
The motor continues at that velocity until it first senses the Home Sensor input. It continues
at the same velocity until the motor’s encoder marker channel is sensed. The rising edge of
the motor’s encoder marker channel is used to establish the reference position. Once the
home reference is detected, the motor decelerates to a stop and moves to the offset position.
15
FM-3 Programming Module Reference Manual
n
Home Sequence
1.If on sensor then back off (if enabled)
2.Search for sens or
3.Search for marker
4.Go to offset (2.0 Revs)
5.Set feedback position equal to End of Home Position
Velocity
+ 100
Back off
Sensor
- 100
Figure 17:Home Velocity Profile
Start of Home
Marker
4
Offset Move
2.0 Revs
2
Sensor
+ 100
Sensor
Final Position = End of Home Positio
Marker
1
Back Off Sensor
Home Move
5
Time
16
Offset
Figure 18:Home Move Sequence
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