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
your local Rockwell Automation
® sales office or online at http://www.rockwellautomation.com/literature/) 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.
available from
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. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
Identifies information that is critical for successful application and understanding of the product.
Rockwell Automation, Allen-Bradley, TechConnect, ControlLogix, GuardLogix, CompactBlock Guard I/O, ControlFLASH, Log ix5000, RSLogix, RSNetWorx, CompactLogix, Compact I/O, DriveLogix, Integrated
Architecture, KwikLink, MicroLogix, PanelView, PhaseManager, POINT Guard I/O, POINT I/O, PowerFlex, Rockwell Software, SLC, and RSLinx are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
Summary of Changes
The information below summarizes the changes to this manual since the last
publication.
To help you find new and updated information in this release of the manual, we
included change bars as shown to the right of this paragraph.
Top icPa ge
Specifications and certifications are in the CompactLogix Controller Specifications Technical
Data, publication 1769-TD005
Added information on using unicast connections for I/O modules on EtherNet/IP networks16, 57
Added installation informationChapter 2
Added information on Run mode protection for the safety task signature36, 90, 91
Updated I/O replacement procedures to include various replacement scenarios65…71
Updated Requested Packet Interval maximum value75
Added DCA_INPUT and DCAF_INPUT data types to list of valid types for safety tags78
Restructured information on produced and consumed safety tags and configuring peer
safety controllers so that all information is together in Chapter 6
Moved status indicator description tables to an appendix and added troubleshooting
information
Added information on changing to a 1756-L7xS controller125
Added History of Changes appendix127
.
—
81
Appendix B
Rockwell Automation Publication 1768-UM002C-EN-P - April 20123
Summary of Changes
Notes:
4Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
8Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
Preface
Top icPa ge
Additional Resources9
Understanding Terminology10
This manual is a guide for using Compact GuardLogix™ controllers. It describes
the Compact GuardLogix-specific procedures you use to configure, operate, and
troubleshoot your controller.
Use this manual if you are responsible for designing, installing, programming, or
troubleshooting control systems that use Compact GuardLogix controllers.
You must have a basic understanding of electrical circuitry and familiarity with
relay logic. You must also be trained and experienced in the creation, operation,
and maintenance of safety systems.
For detailed information on related topics like programming your
Compact GuardLogix controller, SIL 3/PLe requirements, or information on
standard Logix components, see the list of Additional Resources
Additional Resources
These documents contain additional information concerning related products
from Rockwell Automation.
Guard I/O EtherNet/IP Safety Modules User Manual, publication
1791ES-UM001
CompactLogix Controllers User Manual, publication 1768-UM001
Logix5000 Controllers General Instruction Set Reference Manual,
publication 1756-RM003
Logix5000 Controllers Common Procedures Programming Manual,
publication 1756-PM001
EtherNet/IP Modules in Logix5000 Control Systems User Manual,
publication ENET-UM001
ControlNet Modules in Logix5000 Control Systems User Manual,
publication CNET-UM001
Provides specifications, dimensions, and certification information for Compact GuardLogix controllers
Contains detailed requirements for achieving and maintaining SIL 3/PLe with the GuardLogix controller system
Provides information on the GuardLogix Safety ap plication instruction set
Provides information on installing CompactBlock ™ Guard I/O™ EtherNet/IP Safety modules
Provides information on using Guard I/O EtherNet/IP Safety modules
Provides information on using CompactLogix™ controllers in standard applications
Provides information on the Logix5000™ instruction set
Provides access to the Logix5000 Controllers set of programming manuals, which covers managing project files,
organizing tags, ladder logic programming, testing routines, creating Add-On Instructions, controller status
data, handling faults, importing and exporting project components and more
Provides information on using EtherNet/IP communication modules in a Logix5000 control system
Provides information on using the 1756-CNB module in Logix5000 control systems
on page 9.
Rockwell Automation Publication 1768-UM002C-EN-P - April 20129
Preface
ResourceDescription
Logix5000 Controllers Execution Time and Memory Use Reference
Manual, publication 1756-RM087
PhaseManager User Manual, publication LOGI X-U M001
SERCOS and Analog Motion Configuration and Startup Manual,
publication MOTION-UM001
Industrial Automation Wiring and Grounding Guidelines, publication
1770-4.1
Provides information on estimating the execution time and memor y use for instructions
Provides information on using RSLogix™ 5000 Import/Export utility
Provides information on programming the controller to use equipment phases in a standard application
Provides information on configuring the controller for motion axes, coordinate system, and motion modules in
standard applications
Provides in-depth information on grounding and wiring programmable controllers
You can view or download publications at
http://www.rockwellautomation.com/literature
technical documentation, contact your local Allen-Bradley® distributor or
Rockwell Automation sales representative.
. To order paper copies of
Understanding Terminology
This table defines terms used in this manual.
Table 1 - Terms and Definitions
AbbreviationFull TermDefinition
1oo2One Out of TwoRefers to the behavioral design of a multi-processor safety system.
CIPCommon Industrial ProtocolA communication protocol designed for industrial automation applications.
CIP SafetyCommon Industrial Protocol – Safety CertifiedSIL 3/PLe rated version of CIP.
DCDiagnostic CoverageThe ratio of the detected failure rate to the total failure rate.
ENEuropean Norm.The official European standard.
GSVGet System ValueAn instruction that retrieves specified controller-status information and places it in a destination tag.
—MulticastThe transmission of information from one sender to multiple receivers.
PFDProbability of Failure on DemandThe average probability of a system to fail to perform its design function on demand.
PFHProbability of Failure per HourThe probability of a system to have a dangerous failure occur per hour.
PLPerformance LevelISO 13849-1 safety rating.
RPIRequested Packet IntervalThe expected rate in time for production of data when communicating over a network.
SNNSafety Network NumberA unique number that identifies a section of a safety network.
SSVSet System ValueAn instruction that sets controller system data.
—StandardAn object, task, tag, program, or component in your project that is not a safety-related item.
—UnicastThe transmission of information from one sender to one receiver.
10Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
System Overview
Top icPag e
Safety Application Requirements11
Distinguishing Between Standard and Safety Components12
Controller Data Flow Capabilities13
Selecting System Hardware14
Selecting Safety I/O Modules14
Selecting Communication Networks14
Programming Requirements15
Chapter 1
Safety Application
Requirements
The Compact GuardLogix controller system is certified for use in safety
applications up to and including Safety Integrity Level (SIL) 3 and Performance
Level (e) in which the de-energized state is the safe state. Safety application
requirements include evaluating probability of failure rates (PFD and PFH),
system reaction-time settings, and functional-verification tests that fulfill
SIL 3/PLe criteria.
For SIL 3 and PLe safety system requirements, including functional validation
test intervals, system reaction time, and PFD/PFH calculations, refer to the
GuardLogix Controller Systems Safety Reference Manual, publication
1756-RM093
operating a Compact GuardLogix SIL 3, PLe safety system.
Compact GuardLogix-based SIL 3/PLe safety applications require the use of at
least one safety network number (SNN) and a safety task signature. Both affect
controller and I/O configuration and network communication.
Refer to the GuardLogix Controller Systems Safety Reference Manual,
publication 1756-RM093
. You must read, understand, and fulfill these requirements prior to
, for details.
Safety Network Number
The safety network number (SNN) must be a unique number that identifies
safety subnets. Each safety subnet that the controller uses for safety
communication must have a unique SNN. Each CIP Safety device must also be
configured with the safety subnet’s SNN. The SNN can be assigned
automatically or manually.
Rockwell Automation Publication 1768-UM002C-EN-P - April 201211
Chapter 1System Overview
For information on assigning the SNN, see Managing the Safety Network
Number (SNN) on page 39.
Safety Task Signature
The safety task signature consists of an ID number, date, and time that uniquely
identifies the safety portion of a project. This includes safety logic, data, and
configuration. The Compact GuardLogix system uses the safety task signature to
determine the project’s integrity and to let you verify that the correct project is
downloaded to the target controller. Creating, recording, and verifying the safety
task signature is a mandatory part of the safety-application development process.
Distinguishing Between
Standard and Safety
Components
See Generate a Safety Task Signature
Slots in the Compact GuardLogix backplane may be populated with other
CompactLogix I/O modules that are certified to the Low Voltage and EMC
Directives. Refer to http://www.ab.com/certification/ce
certificate for the Programmable Control – CompactLogix Product Family and
determine which modules are certified.
You must create and document a clear, logical, and visible distinction between the
safety and standard portions of the application. To aid in creating this distinction,
RSLogix 5000 programming software features safety identification icons to
identify the safety task, safety programs, safety routines, and safety components.
In addition, the RSLogix 5000 software uses a safety class attribute that is visible
whenever safety task, safety programs, safety routine, safety tag, or safety
Add-On Instruction properties are displayed.
The controller does not allow writes to safety tag data from external HMI devices
or via message instructions from peer controllers. RSLogix 5000 software can
write safety tags when the Compact GuardLogix controller is safety-unlocked,
does not have a safety task signature, and is operating without safety faults.
on page 90 for more information.
to find the CE
The 1768 CompactLogix Controllers User Manual, publication 1768-UM001
provides information on using 1768 CompactLogix controllers in standard
(non-safety) applications.
HMI Devices
HMI devices can be used with Compact GuardLogix controllers. HMI devices
can access standard tags just as with a standard controller. However, HMI devices
cannot write to safety tags; safety tags are read-only for HMI devices.
12Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
,
System OverviewChapter 1
IMPORTANT
Compact GuardLogix Controller
Controller Data Flow
Capabilities
This illustration explains the standard and safety data-flow capabilities of the
Compact GuardLogix controller.
Figure 1 - Data Flow Capabilities
StandardSafety
Standard Tasks
Standard Programs
Standard Routines
Program Data
Controller Standard Tags
Safety Task
Safety Programs
Safety Routines
Program Safety Data
Controller Safety Tags
No.Description
1Standard tags and logic behave the same way they do in the standard Logix platform.
2Standard tag data, program- or controller-scoped, can be exchanged with external HMI devices, personal
3Compact GuardLogix controllers are integrated controllers with the ability to move (map) standard tag data
4Controller-scoped safety tags can be read directly by standa rd logic.
5Safety tags can be read or written by safety logic.
6Safety tags can be exchanged between safety controllers over Ethernet or ControlNet networks, including 1756
7Safety tag data, program- or controller-scoped, can be read by external devices, such as HMI devices, personal
computers, and other controllers.
into safety tags for use within the safety task.
ATT EN TI ON : This data must not be used to directly control a SIL 3/PLe
output.
and 1768 GuardLogix controllers.
computers, or other standard controllers.
Once this data is read, it is considered standard data, not SIL 3/PLe data.
Rockwell Automation Publication 1768-UM002C-EN-P - April 201213
Chapter 1System Overview
Selecting System Hardware
The Compact GuardLogix system supports SIL 3 and PLe safety applications.
Controller
1768-L43S and 1768-L45S controllers feature one built-in serial port. A
keyswitch on the front panel lets you change controller modes: RUN, PROGram
and REMote. The 1768 Compact GuardLogix controllers combine a 1768
backplane with a 1769 backplane. This combination includes all the advantages
of the 1768 architecture for safety applications while retaining the 1769 I/O
support for standard applications.
ControllerAvailable 1768
Slots
1768-L43S2216 Modules in 3 Banks2500.5 MB2 MB
1768-L45S4230 Modules in 3 Banks1 MB3 MB
Number of 1768
Communication
Modules
Maximum Local 1769 I/O Modules
Supported
Number of
Connections
Supported
Safety Task
Memory
In addition, Compact GuardLogix controllers support 1768-M04SE SERCOS
modules for motion control in standard (non-safety) applications. For
information on developing motion applications, refer to the SERCOS and
Analog Motion Configuration and Startup Manual, publication
MOTION-UM001
.
Standard
Memory
Selecting Safety I/O Modules
Selecting Communication
Networks
Safety input and output devices can be connected to CIP Safety I/O on
EtherNet/IP networks, allowing output devices to be controlled by a Compact
GuardLogix controller system via EtherNet/IP communication.
For the most up-to-date information on available CIP Safety I/O catalog
numbers, certified series, and firmware revisions, see
http://www.ab.com/certification/safety
.
The Compact GuardLogix controller supports communication that lets it do the
following:
• Distribute and control Safety I/O on EtherNet/IP networks.
• Produce and consume safety tag data between 1756 and 1768 GuardLogix
controllers across EtherNet/IP or ControlNet networks.
• Distribute and control standard I/O on EtherNet, ControlNet, or
DeviceNet networks.
14Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
System OverviewChapter 1
Use these communication modules to provide an interface between Compact
GuardLogix controllers and network devices.
Use this moduleTo interface between
1768-ENBT, series A, revision 3
1768-CNB, series A, revision 3
(1) This or later.
(1)
(1)
The Compact GuardLogix controller and EtherNet/IP devices
Controllers on the ControlNet network
The Compact GuardLogix controller can connect to RSLogix 5000
programming software via a serial connection, an 1768-ENBT EtherNet module,
or a 1768-CNB ControlNet module.
Programming Requirements
See the Additional Resources
on page 9 for more information on using network
communication modules.
RSLogix 5000 software is the programming tool for Compact GuardLogix
controller applications.
Use Ta bl e 2
to identify the minimum software versions for use with your
Compact GuardLogix controllers.
Table 2 - Software Versi ons
Cat. No.RSLogix 5000 Software
1756-L43S, 1756-L45S18Any version
(1) This version or later.
(2) RSLinx Classic version 2.59 or later is required with RSLogix 5000 software version 20 or later.
Versi on
(1)
RSLinx® Classic Software
(1)
Vers ion
(2)
Safety routines include safety instructions, which are a subset of the standard
ladder logic instruction set, and safety application instructions. Programs
scheduled under the safety task support only ladder logic.
Rockwell Automation Publication 1768-UM002C-EN-P - April 201215
Chapter 1System Overview
Table 3 - Supported Features by RSLogix 5000 Software Version
Add-On instructionsXXXXXX
Alarms and eventsXXX
Constant value tagsXXXXXX
Equipment phase routinesXXX
External AccessXXXXXX
Event tasksXXX
Firmware SupervisorXXXXXX
Function block diagrams (FBD)XXX
Integrated motionXXX
Ladder logicXXXXXX
Language switchingXXXXXX
Online import and export of program componentsXXX
Sequential function char t (SFC) routinesXXX
Structured textXXX
Unicast connections for produced and consumed safety tagsXXXX
Unicast connections for safety I/O modulesXX
Version 18Version 19Version 20
Compact GuardLogix controllers support 1768-M04SE SERCOS modules for
motion control in standard (non-safety) applications. For information on
developing motion applications, refer to the SERCOS and Analog Motion
Configuration and Startup Manual, publication MOTION-UM001
.
Compact GuardLogix controllers also support PhaseManager™ programs, which
let you add equipment phases to standard controller applications. Refer to the
PhaseManager User Manual, publication LOGIX-UM001
, for more
information.
For information on using these features, refer to the Logix5000 Controllers
Common Procedures Programming Manual, publication 1756-PM001
publications listed in the Additional Resources
on page 9, and RSLogix 5000
, the
software online help.
16Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
Install the Controller
Top icPag e
Precautions17
Required System Components20
Clearance Requirements20
Module Placement20
Mount the Controller22
Insert or Remove a Memory Card26
Make Communication Connections26
Update the Controller28
Remove a 1768 or 1769 Module from the DIN Rail30
Chapter 2
Precautions
Read and follow these precautions for use.
Environment and Enclosure Information
ATTENTION: This equipment is intended for use in a Pollution Degree 2 industrial environment, in overvoltage Category II
applications (as defined in IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is considered Group 1, Class A industrial equipment according to IEC/CISPR Publication 11. Without appropriate
precautions, there may be difficulties with electromagnetic compatibility in residential and other environments due to
conducted as well as radiated disturbances.
This equipment is supplied as open-type equipment. It must be mounted within an enclosure that is suitably designed for those
specific environmental conditions that will be present and appropriately designed to prevent personal injury resulting from
accessibility to live parts. The enclosure must have suitable flame-retardant properties to prevent or minimize the spread of
flame, complying with a flame spread rating of 5VA or be approved for the application if non-metallic. The interior of the
enclosure must be accessible only by the use of a tool. Subsequent sections of this publication may contain additional
information regarding specific enclosure type ratings that are required to comply with certain product safety certifications.
In addition to this publication, see the following:
• Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1
• NEMA Standard 250 and IEC 60529, as applicable, for explanations of the degrees of protection provided by enclosures
, for additional installation requirements
Rockwell Automation Publication 1768-UM002C-EN-P - April 201217
Chapter 2Install the Controller
Programmable Electronic Systems (PES)
AT TE NT IO N: Personnel responsible for the application of safety-related
Programmable Electronic Systems (PES) shall be aware of the safety
requirements in the application of the system and shall be trained in using
the system.
North American Hazardous Location Approval
The following information applies when operating this
equipment in hazardous locations:
Products marked "CL I, DIV 2, GP A, B, C, D" are suitable for use in Class
I Division 2 Groups A, B, C, D, Hazardous Locations and nonhazardous
locations only. Each product is supplied with markings on the rating
nameplate indicating the hazardous location temperature code.
When combining products within a system, the most adverse
temperature code (lowest "T" number) may be used to help
determine the overall temperature code of the system. Combinations
of equipment in your system are subject to investigation by the local
Authority Having Jurisdiction at the time of installation.
WARNING: EXPLOSION HAZARD
• Do not disconnect equipment unless power has
been removed or the area is known to be
nonhazardous.
• Do not disconnect connections to this equipment
unless power has been removed or the area is
known to be nonhazardous. Secure any external
connections that mate to this equipment by using
screws, sliding latches, threaded connectors, or
other means provided with this product.
• Substitution of components may impair suitability
for Class I, Division 2.
• If this product contains batteries, they must only be
changed in an area known to be nonhazardous.
Informations sur l'utilisation de cet équipement en
environnements dangereux:
Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne conviennent qu'à
une utilisation en environnements de Classe I Division 2 Groupes A, B,
C, D dangereux et non dangereux. Chaque produit est livré avec des
marquages sur sa plaque d'identification qui indiquent le code de
température pour les environnements dangereux. Lorsque plusieurs
produits sont combinés dans un système, le code de température le
plus défavorable (code de température le plus faible) peut être utilisé
pour déterminer le code de température global du système. Les
combinaisons d'équipements dans le système sont sujettes à
inspection par les autorités locales qualifiées au moment de
l'installation.
AVERTISSEMENT: RISQUE D’EXPLOSION
• Couper le courant ou s'assurer que l'environnement
est classé non dangereux avant de débrancher
l'équipement.
• Couper le courant ou s'assurer que l'environnement
est classé non dangereux avant de débrancher les
connecteurs. Fixer tous les connecteurs externes
reliés à cet équipement à l'aide de vis, loquets
coulissants, connecteurs filetés ou autres moyens
fournis avec ce produit.
• La substitution de composants peut rendre cet
équipement inadapté à une utilisation en
environnement de Classe I, Division 2.
• S'assurer que l'environnement est classé non
dangereux avant de changer les piles.
18Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
Install the ControllerChapter 2
European Hazardous Location Approval
The following applies when the product bears the Ex Marking.
This equipment is intended for use in potentially explosive atmospheres as defined by
European Union Directive 94/9/EC and has been found to comply with the Essential Health and
Safety Requirements relating to the design and construction of Category 3 equipment intended
for use in Zone 2 potentially explosive atmospheres, given in Annex II to this Directive.
Compliance with the Essential Health and Safety Requirements has been assured by
compliance with EN 60079-15 and EN 60079-0.
ATTENTION: This equipment is not resistant to sunlight or other sources of
UV radiation.
WARNING:
• This equipment must be installed in an enclosure providing at least IP54
protection when applied in Zone 2 environments.
• This equipment shall be used within its specified ratings defined by
Rockwell Automation.
• Provision shall be made to prevent the rated voltage from being exceeded by
transient disturbances of more than 40% when applied in Zone 2
environments.
• Secure any external connections that mate to this equipment by using
screws, sliding latches, threaded connectors, or other means provided with
this product.
• Do not disconnect equipment unless power has been removed or the area is
known to be nonhazardous.
Prevent Electrostatic Discharge
ATT EN TI ON : 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.
• Use a static-safe workstation, if available.
• Store the equipment in appropriate static-safe packaging when not in
use.
Rockwell Automation Publication 1768-UM002C-EN-P - April 201219
Chapter 2Install the Controller
IMPORTANT
31609-M
Power
OUT
L1
L2/N
90 mm
(3.54 in.)
105 mm (4.13 in.)
90 mm
(3.54 in.)
105 mm (4.13 in.)
1768 Backplane (local)
1768 Controller, Power Supply, and I/O Modules
Remote Bank
1769 Power Supply and
I/O Modules
1769 Backplane
Required System
Components
Clearance Requirements
You need these parts when installing your controller:
• 1768-L43S or 1768-L45S Compact GuardLogix controller
• 1768-PA3 or 1768-PB3 power supply
• 1769-ECR end cap
• Mounting screws (M4 or #8 panhead) or one of these
EN 50 022 DIN rails:
– 35 x 7.5 mm (1.38 x 0.30 in.)
– 35 x 15 mm (1.38 x 0.59 in.)
• 1756-CP3 serial cable (or make your own)
Allow for the minimum clearance from enclosure walls, wireways, and other
equipment.
Module Placement
20Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
These minimum clearances keep the modules cool enough in most situations.
The operating temperature range is 0…60 °C (32…140 °F).
Install the ControllerChapter 2
IMPORTANT
1768 Backplane
1768 Modules
1768-L43S
Slot 2Slot 1Slot 0
1769 Backplane
1769 Modules
1768-L43S
Slot 2Slot 1Slot 0
CompactLogix System Distance Ratings
Because the 1768 CompactLogix power supply works with the controller to
power a 1768 system, the distance rating in a 1768 CompactLogix system
differs from that in a 1769 CompactLogix system.
In the 1768 system, the distance rating is the distance between 1769 I/O
modules and the controller. In the 1769 system, the distance rating is the
distance between 1769 I/O modules and the power supply.
Follow these requirements to determine proper placement of your 1768
controller, power supply, 1768 I/O modules, and 1769 I/O modules:
• Place the 1768-L4xx controller so that it is the last module (furthest away
from the power supply) in the 1768 backplane.
• The 1768 CompactLogix power supply distributes power from the right
side of the supply and must be the leftmost module in the system.
• The local bank is powered by a 1768 power supply.
• Up to eight 1769 I/O modules can reside in the local bank.
• 1768 slots are numbered right to left, starting with the controller as slot 0.
• Up to two remote banks of 1769 I/O modules may be connected by using
1769-CRLx extension cables.
• Remote banks are powered by a standard 1769 power supply.
• Each I/O bank must have its own 1769 power supply.
• 1769 slots are numbered from left to right, starting with the controller as
slot 0.
Rockwell Automation Publication 1768-UM002C-EN-P - April 201221
Chapter 2Install the Controller
IMPORTANT
IMPORTANT
• Up to eight 1769 Compact I/O modules can reside on each side of a 1769
power supply in a remote bank. Consult the module’s specifications for its
distance rating.
1769 power supplies must be separated from the 1768 series
processor by a bus extension cable. Never put a 1769 power supply in
the 1768 backplane or the controller will generate a major fault that
cannot be cleared until you remove the 1769 power supply.
• The type of controller determines the maximum number of 1768 modules
that can reside in the local bank and the maximum number of 1769 I/O
modules that can reside in one local and up to two remote banks.
ControllerMax Local 1768 ModulesMax 1769 I/O Modules (local and remote)
1768-L43S216
1768-L45S430
Mount the Controller
You can mount the controller to a panel or on a DIN rail.
Do not use screws if using a DIN rail to mount the controller. You can
break the mounting tabs if you screw the controller to a panel while it
is on a DIN rail.
Panel Mount the Controller
Follow these steps to mount your controller by using the panhead screws.
1. Connect the CompactLogix modules together as shown in Mount the
Controller on a DIN Rail on page 23.
2. Use the controller as a template and mark pilot holes on your panel.
3. Drill the pilot holes for M4 or #8 screws.
ATTENTION: During mounting of all devices, be sure that all debris
(such as metal chips or wire strands) is kept from falling into the
controller or I/O modules. Debris that falls into the controller or
modules could cause damage while the controller is energized.
4. Use M4 or #8 screws to mount the controller to your panel with 1.16 N•m
(10 lb•in) of torque.
5. Ground the module on a ground bus with a dedicated earth ground stake.
6. Connect the ground bus to a functional earth ground on the panel or a
DIN rail.
22Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
Mount the Controller on a DIN Rail
31595-M
a.
b.
b.
c.
a.
a.
c.
AT TE NT IO N: This product is grounded through the DIN rail to chassis ground.
Use zinc plated yellow-chromate steel DIN rail to assure proper grounding. The
use of other DIN rail materials (for example, aluminum and plastic) that can
corrode, oxidize, or are poor conductors, can result in improper or intermittent
grounding. Secure DIN rail to the mounting surface approximately every
200 mm (7.87 in.) and use end anchors appropriately.
Mount 1768 Components
Follow these steps to mount the controller.
1. Mount the controller on the DIN rail.
Install the ControllerChapter 2
31596 -M
2. Mount additional 1768 modules to the left of the controller.
31597-M
Rockwell Automation Publication 1768-UM002C-EN-P - April 201223
Chapter 2Install the Controller
31599-M
3. Mount the 1768 power supply and other 1768 modules.
Mount 1769 I/O Modules
Follow these steps to mount 1769 I/O modules to the right of the controller.
1. Align the upper and lower tongue-and-groove slots and slide the module
back toward the DIN rail until the bus levers line up.
2. Close the DIN rail latches.
24Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
Install the ControllerChapter 2
a.
b.
a.
Power
OUT
L1
L2/N
3. Slide the bus lever to the left to lock the modules together.
ATTENTION: When attaching I/O modules, it is very important that the
bus connectors are securely locked together for proper electrical
connection.
4. Attach the end cap by using the tongue and groove slots (a) and locking the
bus lever (b).
Confirm the Installation
After you have installed the controller and applied power, check that the PWR
and I/O PWR status indicators are solid green.
If the indicators are in any other state, see Troubleshoot System Power
page 120.
Rockwell Automation Publication 1768-UM002C-EN-P - April 201225
on
Chapter 2Install the Controller
WorkstationController
1 DCD
2 RDX
3 TXD
4 DTR
COMMO N
6 DSR
7 RTS
8 CTS
9
1 DCD
2 RDX
3 TXD
4 DTR
COMMO N
6 DSR
7 RTS
8 CTS
9
Insert or Remove a Memory
Card
Make Communication
Connections
WARNING: When you insert or remove the memory card when 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.
Follow these steps to insert or remove a CompactFlash
card.
1. Press the memory-card door latch on the
controller front panel and pivot the door down
toward you.
2. Insert or remove the card from the slot.
3. Close the memory card door.
WARNING: If you connect or disconnect the serial cable with power
applied to this module or the serial device on the other end of the cable,
an electrical arc can occur. This could cause an explosion in hazardous
location installations.
Make sure that power is removed or the area is nonhazardous before
proceeding.
Connect the 1756-CP3 serial cable to the controller’s serial port and to your
workstation.
If you make your own cable, follow these guidelines.
• Wire the connectors as shown.
• Limit the cable length to 15.2 m (50 ft).
• Attach the shield to both connectors.
26Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
Install the ControllerChapter 2
Use RSLinx software to configure the driver for serial communication.
1. From the Communications menu, choose Configure Drivers.
2. From the Available Driver Types pull-down menu, choose the RS-232
DF1 devices driver.
3. Click Add New.
4. Type a name for the driver and click OK.
5. From the Comm Port pull-down menu on the Configure Devices dialog
box, choose the serial port on the workstation to which your cable is
connected.
6. From the Device pull-down menu, choose Logix5550/CompactLogix.
7. Click Auto-Configure.
a. Click OK if the Auto Configuration Successful dialog box appears.
b. If the dialog box does not appear, go back to step 5
and verify that you
selected the correct comm port.
8. Click Close.
Rockwell Automation Publication 1768-UM002C-EN-P - April 201227
Chapter 2Install the Controller
IMPORTANT
TIP
Update the Controller
The controllers ship without firmware. Controller firmware is packaged with
RSLogix 5000 programming software. In addition, controller firmware is also
available for download from the Rockwell Automation Technical Support
website at: http://www.rockwellautomation.com/support/
.
When installing or updating controller firmware, do not interrupt the update
process in any way. Interrupting the firmware update may result in an
inoperable controller. Inoperable controllers must be returned to Rockwell
Automation.
To install firmware, you can use any of the following.
MethodPage
ControlFlash, version 8 or later, software that ships with RSLogix 5000 software28
AutoFlash software that runs within RSLogix 5000 software29
A 1784-CF64 or 1784-CF128 CompactFlash card with valid firmware already loaded29
Updating your controller firmware via ControlFlash or AutoFlash software
requires either a serial or other network connection to the controller.
Updating via an Ethernet connection is faster, but you must first install a 1768ENBT Ethernet module to connect to the controller via the Ethernet network.
For information on installing, configuring, and operating a 1768-ENBT module,
refer to the EtherNet/IP Modules in Logix5000 Control Systems User Manual,
publication ENET-UM001
.
Install Firmware via ControlFlash Software
1. Make sure the network is connected.
2. Start ControlFlash software.
3. When the Welcome dialog box appears, click Next.
4. Select the catalog number of the controller and click Next.
5. Expand the network until you see the controller.
If the required network is not shown, first configure a driver for that
network in RSLinx software.
6. Select the controller and click OK.
7. Select the desired revision level and click Next.
8. To start the update, click Finish and then Yes.
9. The OK status indicator flashes red to show that the update is in progress.
The status box indicates when the update is complete and the OK status
indicator is solid green.
10. Click OK.
11. Click Cancel and then Yes to close ControlFlash software.
28Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
Install the ControllerChapter 2
TIP
Install Firmware via AutoFlash Software
1. Make sure the network is connected.
2. Using RSLogix 5000 software, attempt a download to a controller project.
3. AutoFlash software launches if the required firmware is not loaded on the
controller.
4. Select the catalog number of the controller and click Next.
5. Expand the network until you see the controller.
If the required network is not shown, first configure a driver for that
network in RSLinx software.
6. Select the controller and click OK.
7. Select the desired revision level and click Next.
8. To start the update, click Finish and then Yes.
9. The OK status indicator flashes red to show that the update is in progress.
The status box indicates when the update is complete and the OK status
indicator is solid green.
10. Click OK.
11. Click Cancel and then Yes to close AutoFlash software.
Install Firmware via a CompactFlash Card
Follow these steps to use RSLogix 5000 software to store the controller program
and firmware of an already-configured controller to the CompactFlash card. The
firmware is automatically stored on your CompactFlash card when you store the
program.
1. With the CompactFlash card installed on the configured controller, on the
Controller Properties dialog box, click the Nonvolatile Memory tab.
2. Click Load Image On Powerup to save to the card.
3. Remove the card and insert it into the controller onto which you want to
load the firmware and user program.
4. Start the new controller and the image stored on the CompactFlash card
loads.
Rockwell Automation Publication 1768-UM002C-EN-P - April 201229
Chapter 2Install the Controller
IMPORTANT
Power
OUT
L1
L2/N
Off
Power
OUT
L1
L2/N
a.
b.
31607-M
Powe r
OUT
L1
L2/N
c.
d.
c.
a.
Remove a 1768 or 1769
Module from the DIN Rail
If you need to remove a module from the DIN rail, follow these steps.
1. Remove power from the controller and wait for all status indicators on the
power supply and controller to turn off.
If you disconnect any part of the system while the controller is still writing its
program to memory, you will lose your program.
2. Remove the 1768 module.
30Rockwell Automation Publication 1768-UM002C-EN-P - April 2012
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