Rockwell Automation Allen-Bradley SynchLink 1756-SYNCH User manual

ControlLogix
SynchLink Module
1756-SYNCH
User Manual

Important User Information
Solid state equipment has operational characteristics differing from those of
electromechanical equipment. Safety Guidelines for the Application,
Installation and Maintenance of Solid State Controls (Publication SGI-1.1
available from your local Rockwell Automation sales office or online at
http://www.ab.com/manuals/gi) describes some important differences
between solid state equipment and hard-wired electromechanical devices.
Because of this difference, and also because of the wide variety of uses for
solid state equipment, all persons responsible for applying this equipment
must satisfy themselves that each intended application of this equipment is
acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for
indirect or consequential damages resulting from the use or application of
this equipment.
The examples and diagrams in this manual are included solely for illustrative
purposes. Because of the many variables and requirements associated with
any particular installation, Rockwell Automation, Inc. cannot assume
responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to
use of information, circuits, equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without
written permission of Rockwell Automation, Inc. is prohibited.
Throughout this manual, when necessary we use notes to make you aware of
safety considerations.
WARNING Identifies information about practices or circumstances
that can cause an explosion in a hazardous environment,
which may lead to personal injury or death, property
damage, or economic loss.
IMPORTANT Identifies information that is critical for successful
application and understanding of the product.
ATTENTION Identifies information about practices or circumstances
that can lead to personal injury or death, property
damage, or economic loss. Attentions help you:
•identify a hazard
•avoid a hazard
•recognize the consequence
SHOCK HAZARD Labels may be located on or inside the equipment (e.g.,
drive or motor) to alert people that dangerous voltage may
be present.
BURN HAZARD Labels may be located on or inside the equipment (e.g.,
drive or motor) to alert people that surfaces may be
dangerous temperatures.

1Publication 1756-UM521C-EN-P - July 2004
Summary of Changes
Introduction
This release of this publication contains updated information. Change
bars, as shown in the right margin of this page, designate locations in
the publication that contain changed information.
New and Revised
Information
Table Summary of Changes.1 lists the new and revised information included in
this publication.
Other changes have been made throughout this manual and, although
not significant enough to warrant mention in the table above, they are
marked by change bars.
Table Summary of Changes.1
In this section: This information was changed or added:
Chapter 2 The brief description of Configuring Time Mastership
Functionality was changed to reflect changes on the module.
For more information, see page 2-5.
Chapter 3 For 1756-SYNCH modules using firmware revision 2.18 or
greater, the module can now use its last configuration when
its connection to the owner-controller closes.
For more information, see page 3-5.
The electronic keying description has been revised.
For more information, see page 3-11.
The Multiplier description has been revised to describe how
the module may truncate values beyond the decimal point.
For more information, see page 3-17.
The CST and SynchLink Mastership description has
changed significantly.
For more information, see page 3-18.
Chapter 5 New configuration screens are included to reflect the
1756-SYNCH module’s new role in Coordinated System Time
(CST) Mastership.
For more information, see page 5-7.
Chapter 6 The behavior of the 1756-SYNCH module’s status indicators
has changed slightly.
For more information, see page 6-2.
Appendix A Updated specifications are available.
Appendix E A full description of the 1756-SYNCH module’s newly
incorporated Configuration Data Tags is available.
For more information, see page E-3.

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Summary of Changes 2

1Publication 1756-UM521C-EN-P - July 2004
Preface
About This Preface
This preface describes how to use this manual. The following table
describes what this preface contains and its location.
Who Should Use
This Manual
You must be able to program and operate an Allen-Bradley
ControlLogix™ controller and ControlLogix I/O modules to efficiently
use your SynchLink™ module.
We assume that you know how to do this in this manual. If you do
not, refer to Related Documentation, before you attempt to use this module.
Purpose of This Manual
This manual describes how to install, configure, and troubleshoot
your ControlLogix SynchLink module.
Table Preface.1
For information about: See page:
Who Should Use This Manual Preface-1
Purpose of This Manual Preface-1
Using the Latest Module Firmware Preface-2
What This Manual Contains Preface-4
Related Products and Documentation Preface-5
IMPORTANT SynchLink should be used in conjunction with a
standard control network, such as ControlNet or
Ethernet. A standard network is used for general
control interlocking and transfer of diagnostic data
across the system.
SynchLink does not function as a standard control
network (e.g. it broadcasts data in a unidirectional
manner).

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Preface 2
Using the Latest
Module Firmware
This manual describes changes to the 1756-SYNCH module when the
module uses firmware revision 2.18. Some of the features described in
this publication may not be available on modules using previous
firmware revisions.
We recommend that you upgrade your 1756-SYNCH module to
firmware revision 2.18 or greater when possible to use fully the
module’s functionality.
FLASH Upgrade the Module’s Firmware Revision
To update a 1756-SYNCH module’s firmware of a controller, first
install a firmware upgrade kit.
•An upgrade kit ships on a supplemental CD along with RSLogix
5000 software.
•To download an upgrade kit:
1. Go to www.ab.com.
2. Choose Product Support.
3. Choose Firmware Updates.
Update the Module
1. Connect the 1756-SYNCH module to the same network as
your workstation.
2. Start ControlFLASH software.
3. Choose Next >.
4. Select the 1756-SYNCH catalog number and choose Next >.

Publication 1756-UM521C-EN-P - July 2004
Preface 3
5. Expand the network until you see the module. If the required
network is not shown, first configure a driver for the network in
RSLinx software.
6. Select the controller and choose OK.
7. Select the revision level to which you want to update the
1756-SYNCH module and choose Next >.
8. To start the update of the module, choose Finish and then Yes.
After the module is updated, the status box displays
Update complete.
9. Choose OK.
10. To close ControlFLASH software, choose Cancel and then Yes
IMPORTANT If the Revision list is empty, download a new
upgrade kit. Some older upgrade kits do not work
with new modules.

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Preface 4
What This Manual Contains
This user manual contains the following sections:
Table Preface.2
Section: Title: Description:
Chapter 1 What is the 1756-SYNCH
module? Overview of the ControlLogix SynchLink module
Chapter 2 Time Synchronization in the
ControlLogix System Description of how the ControlLogix SynchLink module fits in the
ControlLogix system
Chapter 3 SynchLink Module Features Listing and description of the
ControlLogix SynchLink module’s
features
Chapter 4 Installing the SynchLink
Module Description of how to install the ControlLogix SynchLink module
Chapter 5 Configuring the SynchLink
Module Description of how to use RSLogix 5000 to configure the ControlLogix
SynchLink module
Chapter 6 Troubleshooting the
SynchLink Module Description of how to use module indicators and RSLogix 5000 to
diagnose and correct problems with the
ControlLogix SynchLink module
Appendix A Specifications Listing of the ControlLogix SynchLink
module’s specifications
Appendix B Configuring the Star
Configuration Description of how to set up a star configuration with the ControlLogix
SynchLink module
Appendix C Configuring the Daisy Chain
Configuration Description of how to set up a daisy chain configuration with the
ControlLogix SynchLink module
Appendix D Configuring the Ring
Configuration Description of how to set up a ring configuration with the ControlLogix
SynchLink module
Appendix E Software Configuration Tags Description of the module-defined data
types and tags created in RSLogix 5000
for the ControlLogix SynchLink module

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Preface 5
Related Products and
Documentation
The following table lists related ControlLogix products and
documentation:
For more information on these products, contact your local Rockwell
Automation distributor or sales office. The documentation listed in
Table Preface.3 is available at:
•http://www.ab.com/manuals
•http://www.theautomationbookstore.com
Table Preface.3 Related Documentation
Catalog
number: Document title: Publication number:
1756-SYNCH ControlLogix SynchLink Module Installation
Instructions 1756-IN575
1756-A4, -A7,
-A10, -A13, -A17 ControlLogix Chassis Installation Instructions 1756-IN080
1756-PA72,
-PB72 ControlLogix Power Supply Installation Instructions 1756-5.67
1756-PA75,
-PB75 ControlLogix Power Supply Installation Instructions 1756-5.78
1756-PA75R,
-PB75R ControlLogix Redundant Power Supply Installation Instructions 1756-IN573
1756-Series ControlLogix Module Installation Instructions
(Each module has separate installation document.) Multiple 1756-IN
numbers
1756-Series ControlLogix System User Manual 1756-UM001
Multiple numbers SynchLink Design Guide 1756-TD008
1751-SLBA SynchLink Base Block Installation Instructions 1751-IN001
1751-SL4SP SynchLink 4-port Splitter Block Installation
Instructions 1751-IN002
1751-SLBP SynchLink Bypass Switch Block Installation
Instructions 1751-IN003
1756-DM ControlLogix Drive Module Installation Instructions 1756-IN577
1756-DM ControlLogix Drive Module User Manual 1756-UM522
PowerFlex 700S User Manual 20D-UM001
1756-IB16ISOE,
-IH16ISOE ControlLogix Sequence of Events Module User Manual 1756-UM528

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Preface 6
Notes:

1Publication 1756-UM521C-EN-P - July 2004
Table of Contents
Chapter 1
What is the 1756-SYNCH module?
What is the ControlLogix SynchLink Module?. . . . . . . . . . . . . . . . . . 1-1
What Data Does the SynchLink Module Transfer?. . . . . . . . . . . 1-1
Why Synchronize Time Between Chassis? . . . . . . . . . . . . . . . . . . 1-2
What Are Some of the Features Available On the
ControlLogix SynchLink Module? . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Connecting a SynchLink Module to a SynchLink System . . . . . . . . . 1-3
Physical Features of the ControlLogix SynchLink Module . . . . . 1-4
Using Module Identification and Status Information. . . . . . . . . . . . . 1-5
Preventing Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Removal and Insertion Under Power . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Chapter 2
Time Synchronization in the
ControlLogix System
Using the Coordinated System Time (CST) . . . . . . . . . . . . . . . . . . . . 2-2
Time Synchronization in a Distributed Control System . . . . . . . . . . 2-2
Time Synchronization in the SynchLink System . . . . . . . . . . . . . . . . 2-2
SynchLink Node Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
How Do the CST Clock and SynchLink Node Clock
Work Together? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Configuring Time Mastership Functionality. . . . . . . . . . . . . . . . . . . . 2-5
What are the SynchLink Configurations? . . . . . . . . . . . . . . . . . . . . . . 2-6
Star Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Daisy Chain Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Ring Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Cable Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Chapter 3
SynchLink Module Features
Module Features That Cannot Be Configured . . . . . . . . . . . . . . . . . . 3-2
Removal and Insertion Under Power (RIUP) . . . . . . . . . . . . . . . 3-2
Module Fault Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Full RSLogix 5000 Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Status Indicator (LED) Information. . . . . . . . . . . . . . . . . . . . . . . 3-4
Class I Division 2 Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Agency Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Use Last Configuration When Connection Closes . . . . . . . . . . . 3-5
Module Features That Can Be Configured. . . . . . . . . . . . . . . . . . . . . 3-5
Communications Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Electronic Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
Requested Packet Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
SynchLink Transmitted Axes . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Transmitted Direct Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
CST and SynchLink Mastership . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

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Table of Contents 2
Chapter 4
Installing the SynchLink Module
Noting the Power Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Installing the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Connecting the Fiber Optic Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Removing the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Chapter 5
Configuring the SynchLink Module
RSLogix 5000 Configuration Software . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Overview of the Configuration Process . . . . . . . . . . . . . . . . . . . . . . . 5-2
Choose a SynchLink Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Star Configuration.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Daisy Chain Configuration.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Ring Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Creating a New Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Downloading New Configuration Data . . . . . . . . . . . . . . . . . . . . . . . 5-8
Changing Configuration After Module Operation Has Begun . . . . . 5-9
Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Chapter 6
Troubleshooting the
SynchLink Module
Using the Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Using RSLogix 5000 to Troubleshoot the Module. . . . . . . . . . . . . . . 6-3
Determining Fault Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Using Diagnostic Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Message Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Enter Message Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
Appendix A
Specifications

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Table of Contents 3
Appendix B
Configuring the Star Configuration
Using Remote Axis Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Configure Time Master Chassis - Master Node. . . . . . . . . . . . . . B-2
Configure Time Slave Chassis - End Node . . . . . . . . . . . . . . . . . B-8
Configure Time Slave Chassis - End Node . . . . . . . . . . . . . . . . B-13
Appendix C
Configuring the Daisy Chain
Configuration
Configure Time Master Chassis - Master Node. . . . . . . . . . . . . . C-2
Configure Time Slave Chassis - Center Node . . . . . . . . . . . . . . . C-7
Configure Time Slave Chassis - End Node . . . . . . . . . . . . . . . . C-12
Appendix D
Configuring the Ring Configuration
Configure Time Master Chassis - Master Node. . . . . . . . . . . . . D-2
Configure Time Slave Chassis - Center Node . . . . . . . . . . . . . . D-7
Configure Time Slave Chassis - End Node . . . . . . . . . . . . . . . D-12
Appendix E
Software Configuration Tags
Accessing the Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-2
Configuration Data Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-3
Input Data Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-3
Output Data Tags. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-5
Glossary
Index
Rockwell Automation Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Installation Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
New Product Satisfaction Return . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

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Table of Contents 4

1Publication 1756-UM521C-EN-P - July 2004
Chapter 1
What is the 1756-SYNCH module?
This chapter describes the ControlLogix SynchLink module. It also describes
what you must know and do before using the SynchLink module.
What is the ControlLogix
SynchLink Module?
A ControlLogix SynchLink module, through the use of fiber optic
communication technology, allows you to implement:
•time synchronization
•distributed motion control
•coordinated drive control
based on the ControlLogix and PowerFlex 700S platforms. In distributed
control system, the SynchLink module broadcasts reference data and
synchronizes time from a single ControlLogix chassis to multiple other chassis
at a high speed.
What Data Does the SynchLink Module Transfer?
The SynchLink module transfers multiple types of reference data between
chassis, including:
•Produced axis data for chassis to chassis remote axis control
•High speed drive reference data for chassis to drive control
•General control information that requires transfer at a high speed and in
a synchronized manner
Table 1.1
For information on: See page:
What is the ControlLogix SynchLink Module? 1-1
Connecting a SynchLink Module to a SynchLink System 1-3
Using Module Identification and Status Information 1-5
Preventing Electrostatic Discharge 1-6
Removal and Insertion Under Power 1-6

Publication 1756-UM521C-EN-P - July 2004
1-2 What is the 1756-SYNCH module?
Why Synchronize Time Between Chassis?
In synchronizing time between chassis, the SynchLink module allows you to:
•share motion data from chassis to chassis because a consistent time
reference is available among chassis for interpolation of velocity and
position data.
•timestamp I/O in multiple chassis and have a common time reference
with which to compare the timestamps.
For more information on how the SynchLink module impacts the time
references between ControlLogix chassis, see Chapter 2, Time
Synchronization in the ControlLogix System.
What Are Some of the Features Available On the ControlLogix
SynchLink Module?
The following are some of the features available on the ControlLogix
SynchLink module:
•Support of multiple SynchLink system configurations - Star, daisy chain
and ring
For more information on these functions, see Chapter 2, Time
Synchronization in the ControlLogix System.
For more information on how to configure the module with RSLogix
5000, see Chapter 5, Configuring the SynchLink Module.
•Removal and insertion under power (RIUP) - This system feature allows
you to remove and insert the module while power is applied. For more
information on RIUP, see page 1-6.
•Communication of remote axis data in a timely and
deterministic manner
•Communication of direct and buffered data
•Class I Division 2, UL, CSA, and CE Agency Certification

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What is the 1756-SYNCH module? 1-3
Connecting a SynchLink
Module to a SynchLink
System
ControlLogix SynchLink modules mount in a ControlLogix chassis and
connects to other SynchLink node through a fiber optic cable system.
For more information on the available fiber optic cables, see Table 1.2.
When you install the SynchLink module in a Star Configuration, you need to
use hubs as well as fiber optic cables. A hub is a combination of one base block
with up to four splitter blocks. A bypass switch block is also available for use in
the daisy chain configuration. For more information on the Star
Configuration, see 2-6.
For more information the hub components available for use with the
SynchLink module, see Table 1.3
For more information on SynchLink fiber optic cable systems, see The
SynchLink Design Guide, publication 1756-TD008.
Table 1.2 Fiber Optic Cables Available with the 1756-SYNCH Module
Catalog number: Cable length Cables per box:
1403-CF001 1m (3.28ft) 2
1403-CF003 3m (9.84ft)
1403-CF005 5m (16.4ft)
1403-CF010 10m (32.8ft) 1
1403-CF020 20m (65.6ft)
1403-CF050 50m (164ft)
1403-CF100 100m (328ft)
1403-CF250 250m (820ft)
Table 1.3 Hub Components Available with the 1756-SYNCH Module
Catalog Number: Hub Type:
1751-SLBA SynchLink Fiber Base Block
1751-SL4SP SynchLink Fiber 4-Port Splitter Block
1751-SLBP SynchLink Fiber Bypass Switch Block

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1-4 What is the 1756-SYNCH module?
Physical Features of the ControlLogix SynchLink Module
Figure 1.1
Table 1.4 lists descriptions of the physical features shown in Figure 1.1.
Backplane
Connector- Interface
to the ControlLogix
system backplane
Status
Indicators
42744
LINK
SYNC
OK
Module side view Module front view
LINK
COMM
Transmit
Fiber Port
Receive
Fiber Port
Table 1.4
Physical Feature: Description:
Backplane connector The backplane connector connects the
module to the ControlLogix chassis
backplane.
Status indicators The status indicators display the module’s
communications and SynchLink system
status.
Transmit fiber port The transmit fiber port allows connection
(via fiber optic cables) to other SynchLink
modules so the module can send data.
Receive fiber port The receive fiber port allows connection (via
fiber optic cables) to other SynchLink
modules so the module can receive data.

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What is the 1756-SYNCH module? 1-5
Using Module
Identification and Status
Information
Each ControlLogix SynchLink module maintains specific identification
information that separates it from all other modules. This information assists
you in tracking all the components of your system.
For example, you can track module identification information to be aware of
exactly what modules are located in any ControlLogix rack at any time. While
retrieving module identity, you can also retrieve the module’s status.
Each module maintains the following information:
Table 1.5 Module Identification and Status Information
Module Identification: Description:
Product Type Module’s product type, such as Digital I/O or Analog I/O
module
Product Code Module’s catalog number
Major Revision Module’s major revision number
Minor Revision Module’s minor revision number
Status Module’s status. Returns the following information:
•Controller ownership (if any)
•Whether module has been configured
•Device Specific Status, such as:
–Self-Test
–Flash update in progress
–Communications fault
–Not owned (outputs in program mode)
–Internal fault (need flash update)
–Run mode
•Minor recoverable fault
•Minor unrecoverable fault
•Major recoverable fault
•Major unrecoverable fault
Vendor ID Module manufacturer vendor, for example Allen-Bradley
Serial Number Module serial number
Length of ASCII Text String Number of characters in module’s text string
ASCII Text String Module name
IMPORTANT To retrieve this information, you can use the WHO service
in RSLinx. For more information on how to retrieve
module identification information, see the RSLinx online
help.

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1-6 What is the 1756-SYNCH module?
Preventing Electrostatic
Discharge
This module is sensitive to electrostatic discharge.
Removal and Insertion
Under Power
These modules are designed to be installed or removed while chassis power is
applied.
Repeated electrical arcing causes excessive wear to contacts on both the
module and its mating connector. Worn contacts may create electrical
resistance that can affect module operation.
Chapter Summary and
What’s Next
In this chapter, you read about the ControlLogix SynchLink module. For
information about Time Synchronization in the ControlLogix System, see
Chapter 2.
ATTENTION This equipment is sensitive to electrostatic discharge, which
can cause internal damage and affect normal operation.
Follow these guidelines when you handle this equipment:
•Touch a grounded object to discharge potential static.
•Wear an approved grounding wriststrap.
•Do not touch connectors or pins on component
boards.
•Do not touch circuit components inside the equipment.
•If available, use a static-safe workstation.
•When not in use, store the equipment in appropriate
static-safe packaging.
WARNING When you insert or remove the module while backplane
power is on, an electrical arc can occur. This could cause an
explosion in hazardous location installations. Be sure that
power is removed or the area is nonhazardous before
proceeding.