Rockwell Automation 1747-ACNR15 User Manual
ControlNet™
Adapter Module
(Catalog Numbers 1747-ACN15,
1747-ACNR15)
User Manual
Important User Information
Because of the variety of uses for the products described in this publication,
those responsible for the application and use of this control equipment 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.
The illustrations, charts, sample programs and layout examples shown in this
guide 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 manual we use notes to make you aware of safety
considerations:
ATTENTION
Identifies information about practices or circumstances that
can lead to personal injury or death, property damage or
economic loss
!!!!
Attention statements help you to:
• identify a hazard
• avoid a hazard
• recognize the consequences
IMPORTANT
ControlNet and SLC 500 are trademarks of Rockwell Automation.
PLC-5 is a registered trademark of Rockwell Automation.
Identifies information that is critical for successful
application and understanding of the product.
Table of Contents
Preface
Introducing the ControlNet
Adapter Module
Installing Your ControlNet Adapter
Module
Who Should Use this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-1
Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-1
Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-1
Common Techniques Used in this Manual. . . . . . . . . . . . . . . . . . . P-1
Rockwell Automation Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-2
Local Product Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P-2
Technical Product Assistance. . . . . . . . . . . . . . . . . . . . . . . . . . . P-2
Your Questions or Comments on this Manual . . . . . . . . . . . . . P-2
Chapter 1
Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Module Description and Features . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Hardware Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Diagnostic Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Network Access Port (NAP) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
ControlNet Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Network Address Switch Assemblies . . . . . . . . . . . . . . . . . . . . . 1-3
Chapter 2
Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Compliance to European Union Directives. . . . . . . . . . . . . . . . . . . 2-1
EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Low Voltage Directive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Determining Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Setting the Network Address Switches. . . . . . . . . . . . . . . . . . . . . . . 2-2
Installing the Adapter Module in the Chassis . . . . . . . . . . . . . . . . . 2-3
Connecting Your Adapter to the ControlNet Network . . . . . . . 2-4
Connecting Programming Terminals to the Network via the NAP . 2-6
Powerup Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Chapter 3
Planning to Use Your ControlNet
Adapter Module
i Publication 1747-UM003 A-EN-P
Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Compatible 1746 and 1747 I/O Modules . . . . . . . . . . . . . . . . . . . . 3-1
Overview of Adapter Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Software Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Rack and Module Connections . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Optimizing SLC ControlNet Adapter Rack Connections . . . . . 3-4
Module Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Output Operation During Fault and Idle Modes . . . . . . . . . . . 3-6
Understanding ControlNet I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Scheduled Data-Transfer Connections on a
ControlNet Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Table of Contents ii
Application Examples
Chapter 4
Example 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Hardware Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Configuring The ControlNet Network with
RSNetWorx™ for ControlNet . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Create a Ladder Logic Program . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Example 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Hardware Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Configuring The ControlNet Network with
RSNetWorx™ for ControlNet . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Create a Ladder Program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Example 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Hardware Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Configuring The ControlNet Network with
RSNetWorx™ for ControlNet . . . . . . . . . . . . . . . . . . . . . . . . 4-22
Create a Ladder Logic Program . . . . . . . . . . . . . . . . . . . . . . . . 4-30
Example 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31
Hardware Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31
Configuring The ControlNet Network with
RSNetWorx™ for ControlNet . . . . . . . . . . . . . . . . . . . . . . . . 4-32
Create Ladder Logic and Basic Module Programs . . . . . . . . . . 4-43
Example 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-46
Hardware Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-46
Configuring The ControlNet Network with
RSNetWorx for ControlNet . . . . . . . . . . . . . . . . . . . . . . . . . . 4-47
Create a Ladder Logic Program . . . . . . . . . . . . . . . . . . . . . . . . 4-57
Troubleshooting
Specifications
Understanding Your SLC 500/1746
Control System
Publication 1747-UM003A-EN-P
Chapter 5
Chapter Objectives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Troubleshooting With the Status Indicators and Status Display . . . 5-1
Health Indicators and Display Mnemonics . . . . . . . . . . . . . . . . 5-2
ControlNet Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Appendix A
Appendix B
Selecting Your SLC 500/1746 Control Power Supply. . . . . . . . . . . B-1
Power Supply Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
SLC 500 System Installation Recommendations . . . . . . . . . . . . . . . B-6
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6
Selecting an Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6
Spacing Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7
Preventing Excessive Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-8
Wiring Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-8
Table of Contents iii
Grounding Guidelines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-9
Master Control Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-11
Emergency-Stop Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-13
Common Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-15
Loss of Power Source. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-16
Input States on Power Down . . . . . . . . . . . . . . . . . . . . . . . . . B-16
Other Types of Line Conditions . . . . . . . . . . . . . . . . . . . . . . . B-16
Power Conditioning Considerations . . . . . . . . . . . . . . . . . . . . B-16
Special Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-18
Output Contact Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . B-20
Mounting Your Control System . . . . . . . . . . . . . . . . . . . . . . . . . . B-21
Mounting Modular Hardware Style Units. . . . . . . . . . . . . . . . B-21
Installing Your I/O Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-25
Features of an SLC 500 I/O Module. . . . . . . . . . . . . . . . . . . . B-25
Definition of Sinking and Sourcing. . . . . . . . . . . . . . . . . . . . . B-26
Inserting I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-28
Removing I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-30
Wiring the I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-31
Using Removable Terminal Blocks . . . . . . . . . . . . . . . . . . . . . B-32
Calculating Heat Dissipation for Your Control System. . . . . . . . . B-34
Module Heat Dissipation: Calculated Watts
vs. Maximum Watts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-34
Calculating the Power Supply Loading . . . . . . . . . . . . . . . . . . B-35
Determining the Power Supply Dissipation. . . . . . . . . . . . . . . B-38
Glossary
Index
Publication 1747-UM003 A-EN-P
Table of Contents iv
Publication 1747-UM003A-EN-P
Preface
Read this preface to familiarize yourself with the rest of the manual. It provides
information concerning:
• who should use this manual
• the purpose of this manual
• related documentation
• conventions used in this manual
• Allen-Bradley support
Who Should Use this Manual
Purpose of this Manual
Use this manual if you are responsible for designing, installing, programming, or
troubleshooting control systems that use the ControlNet Adapter Module.
You should have a basic understanding of electrical circuitry and familiarity with
relay logic. If you do not, obtain the proper training before using this product.
This manual is a reference guide for the ControlNet Adapter Module. It describes
the procedures you use to install, program and troubleshoot your module. This
manual also includes several application examples.
Related Documentation
The following documents contain additional information concerning
Allen-Bradley products. To obtain a copy, contact your local Allen-Bradley office or
distributor.
Publication Publication
Number
ControlNet PLC-5 Programmable Controllers User Manual Phase 1.5 1785-6.5.22
ControlNet Cable System Component List AG-2.2
ControlNet Cable System Planning and Installation Manual 1786-6.2.1
ControlNet Coax Tap Installation Instructions 1786-2.3
ControlNet Network Access Cable Installation Instructions 1786-2.6
ControlNet Repeater Installation Instructions 1786-2.7
Industrial Automation Wiring and Grounding Guidelines 1770-4.1
SLC 500™ Modular Hardware Style User Manual 1747-6.2
ControlNet Scanner Module Reference Manual 1747-6.23
Common Techniques Used in this Manual
1 Publication 1747-UM003 A-EN-P
The following conventions are used throughout this manual:
• Bulleted lists such as this one provide information, not procedural steps.
• Numbered lists provide sequential steps or hierarchical information.
• Italic type is used for emphasis.
Preface 2
Rockwell Automation Support
Rockwell Automation offers support services worldwide, with over 75 Sales/
Support Offices, 512 authorized Distributors and 260 authorized Systems
Integrators located throughout the United States alone, plus Rockwell Automation
representatives in every major country in the world.
Local Product Support
Contact your local Rockwell Automation representative for:
• sales and order support
• product technical training
• warranty support
• support service agreements
Technical Product Assistance
If you need to contact Rockwell Automation for technical assistance, please review
the Troubleshooting appendix in your controller’s User Manual first. Then call your
local Rockwell Automation representative.
Your Questions or Comments on this Manual
If you find a problem with this manual, or you have any suggestions for how this
manual could be made more useful to you, please contact us at the address below:
Rockwell Automation
Control and Information Group
Technical Communication, Dept. A602V
P.O. Box 2086
Milwaukee, WI 53201-2086
or visit our internet page at:
http://www.rockwellautomation.com
Publication 1747-UM003A-EN-P
Chapter
1
Introducing the ControlNet Adapter Module
Chapter Objectives
Module Description and Features
This chapter describes the ControlNet adapter modules (cat. no. 1747-ACN15
and 1747-ACNR15):
• features
• hardware components, including
– diagnostic indicators
– network access port (NAP)
– ControlNet connectors
– network address switch assemblies
The 1747-ACN15 and 1747-ACNR15 adapters control remote 1746 I/O on
the ControlNet network. The ControlNet network is a communication
architecture that allows the exchange of messages between ControlNet
products compliant with the CI specification.
The 1747-ACN15 and 1747-ACNR15 adapters features include:
• high-speed data transfer
• diagnostic messages
• local communication network access through the network access port
(NAP)
• redundant media (1747-ACNR15 only)
Hardware Components
1 Publication 1747-UM003 A-EN-P
The adapter module consists of the following major components:
• ControlNet status indicators
• status display
• network access port (NAP)
• ControlNet connectors (one on 1747-ACN15; two on 1747-ACNR15)
• module net address switch assemblies (on top of module)
1-2 Introducing the ControlNet Adapter Module
Figure 1.1 ControlNet Adapter Module
Module Network Address Switches
(accessible through top of module)
1747-ACN15
ADDRESS/STATUS
OK OK
A
ADDRESS/STATUS
BAA
B
Diagnostic Indicators
Status Display and
Net Address
Health Indicators
ControlNet Status Indicators
Network Access Port (NAP)
1747-ACNR15
A
ControlNet Media Port
ControlNet Redundant Media Port (1747-ACNR15 only)
Diagnostic Indicators
Health indicators are located on the front panel of the adapter module,
See Figure 1.1. They show both normal operation and error conditions in your
remote I/O system.
In addition, an alphanumeric display (net address/status) provides status code
indications when an error occurs during initialization or operation.
A complete description of the diagnostic indicators and status display and how
to use them for troubleshooting is explained in Chapter 5.
Network Access Port (NAP)
The network access port provides a bidirectional electrical interface for
programming, maintenance, and I/O monitoring devices in both redundant
and non-redundant connections. See Figure 1.1 connecting programming
terminals to the network using the NAP above.
Publication 1747-UM003A-EN-P
Introducing the ControlNet Adapter Module 1-3
ControlNet Connectors
Cable connection to the module is through standard BNC connectors on the
module frontplate.
Figure 1.2 Redundant Media System
Terminator
Terminator
trunkline A =
trunkline B =
PLC-5C or SLC 5/02 or later
with 1747-SCNR
(1) End device supporting redundant cabling is a 1747-ACNR15.
A
Terminator
B
Terminator
end device
(1)
end device
(1)
Refer to the ControlNet Cable System Planning and Installation User Manual,
publication 1786-6.2.1 for more information.
Network Address Switch Assemblies
You must set two switch assemblies to configure your adapter module with its
unique network address. You access these switches through the top of the
module. Figure 1.3 shows the location of the switches. These switches are read
on powerup to establish the network address of the module. Network address
switch settings are described in Chapter 2.
For optimum throughput, assign sequential addresses to ControlNet nodes.
Publication 1747-UM003 A-EN-P
1-4 Introducing the ControlNet Adapter Module
Publication 1747-UM003A-EN-P
Chapter
2
Installing Your ControlNet Adapter Module
Chapter Objectives
Compliance to European Union Directives
This chapter describes the procedures for installing your ControlNet adapter
module. These include:
• European Directive compliance
• determining power requirements
• setting the network address switches
• setting the I/O chassis switches
• installing the adapter module in the chassis
• connecting programming terminals to the network via the network access
port (NAP)
• powerup sequence
For general installation guidelines, see SLC 500 System Installation
Recommendations on page B-6. If this product has the CE mark it is approved
for installation within the European Union and EEA regions. It has been
designed and tested to meet the following directives.
EMC Directive
This product is tested to meet Council Directive 89/336/EEC Electromagnetic
Compatibility (EMC) and the following standards, in whole or in part,
documented in a technical construction file:
• EN 50081-2
EMC - Generic Emission Standard, Part 2 - Industrial Environment
• EN 50082-2
EMC - Generic Immunity Standard, Part 2 - Industrial Environment
This product is intended for use in an industrial environment.
1 Publication 1747-UM003 A-EN-P
2-2 Installing Your ControlNet Adapter Module
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC Low Voltage, by
applying the safety requirements of EN 61131-2 Programmable Controllers,
Part 2 - Equipment Requirements and Tests.
For specific information required by EN 61131-2, see the appropriate sections
in this publication, as well as the following Allen-Bradley publications:
•
Industrial Automation Wiring and Grounding Guidelines For Noise
Immunity, publication 1770-4.1
•
Automation Systems Catalog, publication B111
Determining Power Requirements
Setting the Network Address Switches
The ControlNet adapter module requires a maximum backplane current of
900 mA at 5V dc. Remember to add this amount to other current
requirements for your I/O chassis.
The switches on the top of the adapter module determine the network address
of the adapter. The two switches are:
• the ten’s switch
• the one’s switch
The combination of these switches allows selection of network addresses from
01 to 99.
NOTE
Figure 2.1 Setting the Network Address
00 is an invalid number.
Ten ’s
Selection
One’s
Selection
Publication 1747-UM003A-EN-P
Installing Your ControlNet Adapter Module 2-3
Installing the Adapter Module in the Chassis
Power
Supply
Card Guide
Once you’ve set the appropriate switch assemblies for your adapter module,
follow these procedures for installation.
Refer to the Industrial Controller Wiring and Grounding Guidelines, Publication
1770-4.1 for proper grounding and wiring methods to use when installing
your module.
ATTENTION
Remove system power before removing or installing your
module in the I/O chassis. Failure to observe this warning
could damage module circuitry and injure people.
!!!!
1. Remove power from the I/O chassis before inserting (or removing) the
module.
2. Align the circuit board with the chassis card guide in the left slot.
3. Slide the module into the chassis until the top and bottom latches are
Latch
latched. To remove the module, press the releases at the top and bottom
of the module and slide it out.
4. Press firmly and evenly to seat the module in its backplane connectors.
ATTENTION
!!!!
Do not force the module into the backplane connector. If
you cannot seat the module with firm pressure, check the
alignment. Forcing the module can damage the backplane
connector or the module.
Publication 1747-UM003 A-EN-P
2-4 Installing Your ControlNet Adapter Module
Connecting Your Adapter to the ControlNet Network
You connect your 1747-ACN15 or -ACNR15 adapter module to a
ControlNet network via taps. These taps are available:
Straight T-tap
1786-TPS 1786-TPYS
IMPORTANT
1. Remove the tap’s dust cap (located on the straight or right angle
connector).
If your node
supports:
Non-redundant media to the channel A connector on the 1747-ACN15 or
Redundant media • from trunkline A to channel A on the 1747-ACNR15
(1)
While both channels are active, Allen-Bradley recommends using channel A for non-redundant media.
Straight Y-tap
Taps contain passive electronics and must be purchased
from Allen-Bradley for the network to function properly.
Connect the tap’s straight or right angle connector:
1747-ACNR15 (channel B on the 1747-ACNR is not used)
• from trunkline B to channel B on the 1747-ACNR15
Right-angle T-tap Right-angle Y-tap
1786-TPR
1786-TPYR
(1)
Publication 1747-UM003A-EN-P
ATTENTION
!!!!
Do not allow any metal portions of the tap to contact any
conductive material. If you disconnect the tap from the
adapter, place the dust cap back on the straight or right
angle connector to prevent the connector from accidentally
contacting a metallic grounded surface.
Installing Your ControlNet Adapter Module 2-5
segment 1
Tap
dust cap
2. Remove and discard the dust caps from the adapter BNC jacks.
3. Connect this tap’s straight or right angle connector to the BNC
connector on the adapter.
IMPORTANT
To prevent inadvertent reversal of the tap connections
(resulting in incorrect LED displays and troubleshooting),
check the tap drop cable for a label indicating the attached
segment before making your connection.
4. For redundant adapters (1747-ACNR15), remove (and save) the dust
cap located on the straight or right angle connector of the designated tap
on the second segment (segment 2).
segment 2
tap
dust cap
5. Connect this tap’s straight or right angle connector to the BNC
connector on the adapter.
segment 1
tap
segment 2
tap
After terminating your segments, connect the node to the network.
Publication 1747-UM003 A-EN-P
2-6 Installing Your ControlNet Adapter Module
Connecting Programming Terminals to the Network via the NAP
Using 1784-KTC or -KTCx Communication Card and NAP
Programming Terminal
1784-KTC or
-KTCx
ControlNet network
You can connect programming terminals to the ControlNet network by
connecting to the network access port (NAP). Two methods are shown below.
Using 1770-KFC Communication Interface and NAP
Programming Terminal
1770-KFC
(1)
1786-CP
ControlNet
product
(1) The 1786-CP cable can be plugged into any ControlNet product’s NAP to provide
programming capability on the ControlNet network. A programming terminal connected
through this cable is counted as a node and must have a unique address.
Serial or Parallel
Connection
ControlNet Network
1786-CP
ControlNet
product
(1)
ATTENTION
!!!!
Use the 1786-CP cable when connecting a programming
terminal to the network through NAPs. Using a
commercially available RJ-style cable could result in
possible network failures.
Publication 1747-UM003A-EN-P
Installing Your ControlNet Adapter Module 2-7
Powerup Sequence
There are three health indicators on the module. The LED on the right
(labeled “OK”) is the generic module health indicator. The LED in the middle
(labeled “A”) is the health indicator of cable A. On the 1747-ACNR15, the
LED on the left (labeled “B”) is the health indicator for cable B. In addition,
the alphanumeric display can display module status. The following describes
the normal power-up sequence for the adapter module. (Refer
to Troubleshooting With the Status Indicators and Status Display on page 5-1
and ControlNet Status Indicators on page 5-3 for explanation of the LED’s
and alphanumeric display.)
ADDRESS/STATUS
B
A
Status
Health Indicators
Channel A and B
OK
indicators
1. Apply power to the chassis - notice that all three health indicators should
be off and the status window indicates “POST” (Power On Self Test).
2. After “POST”, the status window displays the sequence “0000”, “1111”,
“2222”, through “9999”. During this time, the A and B LEDs are off
and the OK LED toggles between red and green; this happens so fast,
the OK LED appears amber.
3. The series and revision levels are then displayed in the status window. A
series A revision level B module would display “A/B”. During this time,
the A and B LEDs are off and the OK LED toggles between red and
green; this happens so fast, the OK LED appears amber.
4. After the operating system is loaded and initialized, the status window
and the LEDs indicate the status of the module and its connections to
the cable(s). If the module address is not zero and a valid ControlNet
connection is made to either channel A or B, the status window toggles
between “ACTV” (Active) and the module node address (“A#02”, node
address number 2). If there are no active connectors, the status window
displays “IDLE”.
5. If there is a hardware problem of any kind, the health LED turns red and
the status window toggles between “FATL” and up to four alphanumeric
characters. The “FATL” indicates that there was a fatal error and the
characters indicate what the error is.
For detailed information on planning and installing your ControlNet system,
refer to Related Publication on page P-1.
Publication 1747-UM003 A-EN-P
2-8 Installing Your ControlNet Adapter Module
Publication 1747-UM003A-EN-P
Chapter
3
Planning to Use Your ControlNet Adapter
Module
Chapter Objectives
Compatible 1746 and 1747 I/O Modules
This chapter explains how the adapter operates on ControlNet and
provides information to assist in configuring your system. This includes:
• compatible 1746 and 1747 I/O modules
• overview of adapter operation
• software requirements
• rack and module connections
• optimizing SLC ControlNet Adapter connections
• module keying
• output operation during Fault and Idle modes
• understanding ControlNet I/O
• scheduled Data-Transfer connections on a ControlNet network
The majority of 1746 and 1747 discrete, analo g and specialty modules
are compatible with the 1747-ACN15 and 1747-ACNR15 adapters.
Exceptions include any modules that require G file configuration. These
include:
• 1747-SN Remote I/O Scanner module
• 1747-BSN Back-Up Remote I/O Scanner module
• 1746-QV Open Loop Velocity Control module
• 1203-SM1 Scanport module (Class 4 operation) (This module is
compatible when configured for class 1 operation.)
• 1747-SCNR ControlNet Scanner module (G files not required,
however, this module is not supported by the 1747-ACN15/
ACNR15)
A small number of 1746 modules are currently not supported by the
adapter due to lack of an EDS (electronic data sheet) file. These
modules will be supported once EDS development is completed. A
complete list of compatible 1746 and 1747 modules can be found on the
Allen-Bradley Technical Support Knowledge Base at:
http://www.ab.com/support/kbhome.html.
3-2 Planning to Use Your ControlNet Adapter Module
Overview of Adapter Operation
Connections are established between a scanner and an adapter to exchange
input and output data on the network. Status information is transferred along
with the I/O data and status.
1747-ACN15/ACNR15 adapters support connections to individual modules
and rack connections to a group of modules. The adapters support multiple
rack and group connections to the same modules, as long as only one scanner
controls any module’s outputs. Up to 64 connections per adapter are possible
with 240 words (max) supported per connection. An adapter can control up to
30 slots of 1746 I/O (3 chassis max). The input data attributes correspond
directly to the read area of the I/O module’s data table image. The output
attributes correspond directly to the write area of the I/O module’s data table
image.
RSNetWorx is the software tool that is used to schedule network bandwidth
for all scheduled traffic originators that reside on a ControlNet network
segment. RSLinx is the communication software tool used by RSNetWorx to
access the ControlNet network. A 1784-KTCX15 PC card or 1784-PCC
ControlNet card can be used as the hardware interface to the network.
Software Requirements
RSNetWorx for ControlNet version 2.23.00 or greater is required to configure
the 1747-ACN15/ACNR15 adapters. If you only have RSNetWorx for
ControlNet version 2.22.18, it is necessary to add the Service Pack in order to
configure connections with the 1747-ACNR15 adapter. To add the Service
Pack, follow the steps below.
1. Access the Rockwell Software support page at:
http://www.software.rockwell.com/support
2. Click Downloads form the list of choices in the left column.
3. Locate section 2, “Choose a Product”.
4. Click the down arrow and select RSNetWorx from the drop down list.
5. In section 4, click Search.
6. Click Service Pack 1, or click a later version for the Service Pack if it is
not the only Service Pack available.
7. After the download is completed, close all programs and run the
installation of the software. Follow the screen prompts to guide you
through the installation process. If you experience problems performing
the install, contact Rockwell Software Technical Support.
Publication 1747-UM003A-EN-P
When Service Pack 1 is installed, the version of RSNetWorx for ControlNet is
2.23.00 or greater.
Planning to Use Your ControlNet Adapter Module 3-3
Rack and Module Connections
There are two types of scheduled connections supported by the 1747-ACN15,
-ACNR15: the rack connection and the individual module connection.
Rack Connections
For each rack connection, RSNetWorx maps 8, 16, or 32 input and output bits
per slot.
Operation Description
8-bit Rack
Connections
16-bit Rack
Connections
32-bit Rack
Connections
Performed in a deterministic and repeatable manner. This
connection allows a memory and ControlNet bandwidth
efficient way to connect to a rack of 8-bit modules
Performed in a deterministic and repeatable manner. This
connection allows a memory and ControlNet bandwidth
efficient way to connect to a rack of 16-bit modules.
Performed in a deterministic and repeatable manner. This
connection allows a memory and ControlNet bandwidth
efficient way to connect to a rack of 32-bit modules.
The rack connection is used to define a single connection for the discrete
I/O in the SLC backplane. Multiple rack connections, with limitations, are
supported in the SLC adapter. For example, a connection originator might
specify an 8-bit, 16-bit, or 32-bit data size.
IMPORTANT
RSNetWorx allows more than one exclusive owner rack
connection type to be configured to a 1747 adapter (e.g.
8-bit exclusive owner, 16-bit exclusive owner, and 32-bit
exclusive owner), however onl y one exclusive owner rack
connection can be operational at one time. It is
recommended that only one exclusive owner rack
connection type be configured to the adapter to avoid
contention between multiple connections.
IMPORTANT
If a rack connection type is changed to a smaller bit
configuration e.g. 32-bit to 16-bit, or 16-bit to 8-bit, the
unused bits for the new connection are reset to zero.
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3-4 Planning to Use Your ControlNet Adapter Module
Module Connections
Module connections are performed in a deterministic and repeatable manner.
This connection allows a memory and ControlNet bandwidth efficient way to
connect to an individual module with more I/O data than could be attempted
in the above rack connections, or to transfer M0/M1 file data.
Each rack and module connection can be configured with the following
connection types:
1. Exclusive Owner - specifies an independent connection where a single
device controls the output states in the target device. If you have an
existing Exclusive Owner connection to a target device, you cannot
specify another Exclusive Owner or Redundant connection to that same
target device.
2. Input Only - specifies an independent connection where a device
receives inputs fro m the target device and sends c onfiguration data to
the target device. An Input Only connection does not send outp uts; it
only receives inputs. You can specify multiple Input Only connect ions
to the target device from different originators.
3. Listen Only - specifies a dependent connection where a device receives
inputs from the target device, but does not send configuration data with
the target device. A Listen Only connection only functions properly
when another non-Listen Only connection exists to the same target
device. A Listen Only connection does not send outputs; it only receives
inputs. You can specify multiple Listen Only connections to the target
device from different originators.
NOTE
All Listen Only connections are terminated when all
associated independent connections are terminated.
Optimizing SLC ControlNet Adapter Rack Connections
Consider the following example placement of ControlNet devices when you
want to optimize your SLC ControlNet adapter connection:
Node Slot Device
1 1747-SCNR
2 0 1747-ACNR15
1 1746-IB16
2 1746-IB16
3 1746-OB16
4 1746-OB16
5 1746-NIO4I
6 1746-HSCE
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Planning to Use Your ControlNet Adapter Module 3-5
If we change the default number of words for the input and output values (to 4
and 4) when inserting the connection to the 1747-ACNR15 adapter, Node 2
will produce 4 input words over ControlNet and Node 1 will consume and
place those words at addresses I:e.1-4, where the slot 1 inp uts corresp ond to
I:e.3 and the slot 2 inputs correspond to I:e.4. In addition, Node 1 will produce
4 output words over ControlNet originating from addresses O:e.1-4 and Node
2 will consume them. A total of 8 words (4 input and 4 output) are transmitted
on ControlNet.
NOTE
To optimize ControlNet network bandwidth, place the
devices in the following order (left to right on the chassis):
• 1747-ACNR15 adapter
• Discrete input modules
• Discrete output modules
• Any intelligent and/or analog I/O modules that you want
to establish individual module connections to
Consider the following:
• The 1747-SCNR has 31 input words and 31 output words available for
rack connections to 1747-ACNR15 adapters.
• Each 1747-ACNR15 adapter requires 2 input words for status in addition
to the input words assigned to the slots.
• Adjust the rack connection size to match the maximum density I/O
module:
– Discrete 8-bit Exclusive Owner for 4 and 8-point modules
– Discrete 16-bit Exclusive Owner for 16-point modules
– Discrete 32-bit Exclusive Owner for 32-point modules.
Module Keying
Missing or misplaced modules are detected if the module in question is
configured with RSNetWorx as an individual module connection and
“compatible module” is selected for electronic keying. If a module connection
is attempted to a module which is a missing or misplaced module, the
connection will fail. The green OK LED on the initiating scanner will flash
and the module will display “I/O” with a partially filled bar indicating all
connections are not established, as shown below.
I/O
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3-6 Planning to Use Your ControlNet Adapter Module
NOTE
The electronic keying option offered by RSNetWorx for
rack connections applies to the 1747-ACN15 and
-ACNR15 modules only.
Missing or misplaced modules are not detected if the
module in question is configured within a rack connection.
Critical I/O modules that need to be detected when
missing or mispla ced must be configured with indiv idual
module connections.
Output Operation During Fault and Idle Modes
RSNetworx allows configuration to characterize each module connection
activity during certain operational states.
During idle mode and fault modes, outputs are configured for one of the
following operation states:
Output Action
Reset outputs to off
Hold last state
Write Safe State data to outputs
Understanding ControlNet I/O
The ControlNet system is designed to:
• provide high-speed, repeatable, deterministic I/O transmission
• allow control and message information to co-exist on the same physical
media
• make sure that I/O data transfers are not affected by
– programming-terminal message activity
– inter-processor message activity on the network
Scheduled Data-Transfer Connections on a ControlNet Network
Scheduled data transfer on a ControlNet processor:
• is continuous
• is asynchronous to the ladder-logic program scan
• occurs at the actual rate displayed in the Actual Packet Interval field on the
RSNetWorx ControlNet I/O mapping (monitor) screen
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Planning to Use Your ControlNet Adapter Module 3-7
PrivateMemory
Buffers
Scheduled Data Transfers
Scheduled Data Transfer Program Scan
Data Update
DataTab le
Files
Housekeeping
Logic Scan
The ControlNet system places your scheduled transfers in the first part of each
Network Update Interval. Time is automatically reserved for network
maintenance. Unscheduled transfers are performed during the time remaining
in the interval.
You reserve a
specific amount
of time for all
scheduled
operations.
The system
reserves time for
network
maintenance
Any time remaining is used for
unscheduled operations
. . .. . .
Your application and your configuration-number of nodes, application
program, NUT (Network Update Time), amount of scheduled bandwidth
used, etc. determine how much time there is for unscheduled messaging.
IMPORTANT
The ControlNet network reserves time for at least one
maximum-sized unscheduled transfer per update interval.
Depending on how much time there is for unscheduled
messaging, every node may not have a chance to send
unscheduled data every update interval.
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3-8 Planning to Use Your ControlNet Adapter Module
Publication 1747-UM003A-EN-P
Chapter
Application Examples
Table 4.A Table of Contents
Example Number Title Page
1 1747-SCNR ControlNet Scanner Controlling Discrete I/O on
ControlNet via a 1747-ACN15 ControlNet Adapter Using a
Rack Connection
2 1747-SCNR ControlNet Scanner Controlling Discrete and
Analog I/O on ControlNet via a 1747-ACN15 ControlNet
Adapter Using a Rack Connection
3 1747-SCNR ControlNet Scanner Controlling Discrete and
Analog I/O on ControlNet via a 1747-ACN15 ControlNet
Adapter Using Rack and Module Connections
4 1747-SCNR ControlNet Scanner Controlling Discrete I/O and
Serial Data with a 1746-BAS Module on ControlNet via a
1747-ACN15 ControlNet Adapter Using Rack and Module
Connections
5 1747-SCNR ControlNet Scanner Controlling Discrete I/O and
Specialty Modules Requiring M0 File Configuration on
ControlNet via a 1747-ACN15 ControlNet Adapter Using Rack
and Module Connections
4-2
4-11
4-21
4-31
4-46
4
1 Publication 1747-UM003 A-EN-P
4-2 Application Examples
Example 1
1747-SCNR ControlNet Scanner Controlling Discrete I/O on ControlNet via a
1747-ACN15 ControlNet Adapter Using a Rack Connection
This example is organized into the following sections:
• Hardware Setup
• Configuring The ControlNet Network with RSNetWorx™ for
ControlNet, Revision 2.23.02 or later
• Create a Ladder Logic Program
Hardware Setup
The following hardware setup is referenced throughout this example.
Computer with:
• RSLogix 500 Software
• RSLinx Software
• RSNetWorx Software for ControlNet
• 1784-KTCX15 ControlNet PC Card
tap
tap
ControlNet
SLC 5/04
tap
1747-SCNR
1747-ACN15
1746-IA16
1746-OB16
1746-IV16
Publication 1747-UM003A-EN-P
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