Allen-Bradley ControlLogix SynchLink 1756-SYNCH User manual

ControlLogix
SynchLink Module
1756-SYNCH
User Manual
Allen-Bradley Parts

Important User Information
Because of the variety of uses for the products described in this
publication, those responsible for the application and use of these
products must satisfy themselves that all necessary steps have been
taken to assure that each application and use meets all performance
and safety requirements, including any applicable laws, regulations,
codes and standards. In no event will Allen-Bradley be responsible or
liable for indirect or consequential damage resulting from the use or
application of these products.
Any illustrations, charts, sample programs, and layout examples
shown in this publication are intended solely for purposes of
example. Since there are many variables and requirements associated
with any particular installation, Allen-Bradley does not assume
responsibility or liability (to include intellectual property liability) for
actual use based upon the examples shown in this publication.
Allen-Bradley publication SGI-1.1, Safety Guidelines for the
Application, Installation and Maintenance of Solid-State Control
(available from your local Allen-Bradley office), describes some
important differences between solid-state equipment and
electromechanical devices that should be taken into consideration
when applying products such as those described in this publication.
Reproduction of the contents of this copyrighted publication, in whole
or part, without written permission of Rockwell Automation, is
prohibited.
Throughout this publication, notes may be used to make you aware of
safety considerations. The following annotations and their
accompanying statements help you to identify a potential hazard,
avoid a potential hazard, and recognize the consequences of a
potential hazard:
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.
ATTENTION
!
Identifies information about practices or
circumstances that can 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.

Rockwell Automation
Support
Before you contact Rockwell Automation for technical assistance, we
suggest you please review the troubleshooting information contained
in this publication first.
If the problem persists, call your local Rockwell Automation
representative or contact Rockwell Automation in one of the
following ways:
Your Questions or Comments on this Manual
If you find a problem with this manual, please notify us of it on the
enclosed How Are We Doing form.
Phone United
States/Canada 1.440.646.5800
Outside United
States/Canada You can access the phone number for your country via the Internet:
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1Publication 1756-UM521B-EN-P - September 2001
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™ Logix 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.
For information about: See page:
Who Should Use This Manual Preface-1
Purpose of This Manual Preface-1
Related Products and Documentation Preface-4
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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Publication 1756-UM521B-EN-P - September 2001
Preface 2
What This Manual Contains
This user manual contains the following sections:
-
Description of the SynchLink module - Description of how the SynchLink module
synchronizes time in the ControlLogix system
-
Description of the SynchLink module
certifications and general features
-
Description of how to install the SynchLink
module and connect the fiber optic cable
-
Description of how to configure the
SynchLink module with RSLogix 5000
-
Description of howto troubleshoot
the SynchLink module
LINK
SYNC
OK
LINK
COMM
SynchLink

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Preface 3
-
Listing of the SynchLink module
specifications
Appendix B - Configuring the Star
Configuration
Example of how to configure the
SynchLink Star Configuration
-
Example of how to configure the
SynchLink Daisy Chain Configuration
-
Example of how to configure the
SynchLink Ring Configuration
Glossary of terms used with the
SynchLink module Indexoftermsand conceptsexplained
thoughout this user manual
Appendix E - Software
Configuration Tags
Complete list of all the input and
output data tags
Allen-Bradley Parts

Publication 1756-UM521B-EN-P - September 2001
Preface 4
Related Products and
Documentation
The following table lists related ControlLogix products and
documentation:
If you need more information on these products, contact your local
Allen-Bradley integrator or sales office for assistance. For more
information on the documentation, refer to the Allen-Bradley
Publication Index, publication SD499.
Table Preface.A
Related Documentation
Catalog
number: Document title: Pub. number:
1756-SYNCH ControlLogix SynchLink Module Installation
Instructions 1756-IN575
1756-A4, -A7,
-A10, -A13 ControlLogix Chassis Installation Instructions 1756-IN080B
1756-PA72,
-PB72 ControlLogixPowerSupplyInstallationInstructions 1756-5.67
1756-PA75,
-PB75 ControlLogixPowerSupplyInstallationInstructions 1756-5.78
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

iPublication 1756-UM521B-EN-P - September 2001
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 . . . . . . . . . . . . . . . . . . . 1-7
Removal and Insertion Under Power . . . . . . . . . . . . . . . . . 1-7
Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . . 1-8
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. . . . . . . . . . . . . 2-6
What are the SynchLink Configurations?. . . . . . . . . . . . . . . 2-8
Star Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Daisy Chain Configuration . . . . . . . . . . . . . . . . . . . . . . 2-9
Ring Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Cable Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . . 2-11
Chapter 3
SynchLink Module Features
General Module Features. . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Removal and Insertion Under Power (RIUP) . . . . . . . . . 3-2
Module Fault Reporting . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Fully Software Configurable . . . . . . . . . . . . . . . . . . . . . 3-3
LED Status Information. . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Class I Division 2 Certification . . . . . . . . . . . . . . . . . . . 3-4
Agency Certification. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Configurable Module Features . . . . . . . . . . . . . . . . . . . . . . 3-4
Communications Format. . . . . . . . . . . . . . . . . . . . . . . . 3-5
Electronic Keying. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Requested Packet Interval . . . . . . . . . . . . . . . . . . . . . . 3-11
SynchLink Transmitted Axes. . . . . . . . . . . . . . . . . . . . . 3-13
Transmitted Direct Words. . . . . . . . . . . . . . . . . . . . . . . 3-14
CST and SynchLink Mastership. . . . . . . . . . . . . . . . . . . 3-16
Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . . 3-16
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Table of Contents ii
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 . . . . . . . . . . . . . . . . . . 4-5
Chapter 5
ConfiguringtheSynchLinkModule
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
Create a New RSLogix 5000 Project. . . . . . . . . . . . . . . . 5-4
Add a SynchLink Module . . . . . . . . . . . . . . . . . . . . . . . 5-5
Configure the SynchLink Module . . . . . . . . . . . . . . . . . 5-6
Download Configuration . . . . . . . . . . . . . . . . . . . . . . . 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
Message Configuration. . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Retrieving and Resetting Diagnostic Counters. . . . . . . . . . . 6-11
Chapter Summary and What’s Next . . . . . . . . . . . . . . . . . . 6-11
Appendix A
Specifications 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

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Table of Contents iii
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
ConfiguringtheRingConfiguration
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
Input Data Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-3
Output Data Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-4
Glossary
Index
Allen-Bradley Parts

Publication 1756-UM521B-EN-P - September 2001
Table of Contents iv

1Publication 1756-UM521B-EN-P - September 2001
Chapter 1
What is the 1756-SYNCH module?
This chapter describes the ControlLogix SynchLink module. It also
describes ìwhat 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 Doesthe 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
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 1-7
Removal and Insertion Under Power 1-7
Chapter Summary and What’s Next 1-8
Allen-Bradley Parts

Publication 1756-UM521B-EN-P - September 2001
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. 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 1-7.
•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.A.
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 2-8.
For more information the hub components available for use with the
SynchLink module, see Table 1.B
For more information on SynchLink fiber optic cable systems, see The
SynchLink Design Guide, publication 1756-TD008.
Table 1.A
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) 2
1403-CF005 5m (16.4ft) 2
1403-CF010 10m (32.8ft) 1
1403-CF020 20m (65.6ft) 1
1403-CF050 50m (164ft) 1
1403-CF100 100m (328ft) 1
1403-CF250 250m (820ft) 1
Table 1.B
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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Publication 1756-UM521B-EN-P - September 2001
1-4 What is the 1756-SYNCH module?
Before you install and use your module you should have already:
•installed and grounded a 1756 chassis and power supply. For
more information, refer to the publications listed in Table 1.C.
Physical Features of the ControlLogix SynchLink Module
Table 1.C
Chassis and Power Supply Documentation
Catalog
number: Document title: Pub. number:
1756-A4, -A7,
-A10, -A13 ControlLogix Chassis Installation Instructions 1756-IN080
1756-PA72,
-PB72 ControlLogixPowerSupplyInstallationInstructions 1756-5.67
1756-PA75,
-PB75 ControlLogixPowerSupplyInstallationInstructions 1756-5.78
1756-PA75R/A,
-PB75R/A ControlLogix Redundant Power Supply Installation Instructions 1756-IN573
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

Publication 1756-UM521B-EN-P - September 2001
What is the 1756-SYNCH module? 1-5
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.
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.D
Module Identification and Status Information
Module Identification: Description:
Product Type Module’s product type, such as Digital I/O or
Analog I/O module
Catalog Code Module’s catalog number
Major Revision Module’s major revision number
Minor Revision Module’s minor revision number
Allen-Bradley Parts

Publication 1756-UM521B-EN-P - September 2001
1-6 What is the 1756-SYNCH module?
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 the RSLinx software. For more information
on how to retrieve module identification information,
see the RSLinx online help.
Table 1.D
Module Identification and Status Information
Module Identification: Description:

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What is the 1756-SYNCH module? 1-7
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.
ATTENTION
!
Preventing Electrostatic Discharge
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.
Allen-Bradley Parts

Publication 1756-UM521B-EN-P - September 2001
1-8 What is the 1756-SYNCH module?
Chapter Summary and
What’s Next
In this chapter, you learned about the ControlLogix SynchLink
module. For information about Time Synchronization in the
ControlLogix System, see Chapter 2.