Rockwell Automation 1771-ACNR15 User Manual

Allen-Bradley
ControlNet Adapter Module
User
(Cat. No. 1771-ACN15 and
-ACNR15)
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 in part, without written permission of Allen-Bradley Company, Inc., 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 the hazard recognize the consequences
Important: Identifies information that is critical for successful application and understanding of the product.

Preface
es

Objectiv
Audience
Vocabulary
What This Manual Contains
Chapter
Read this preface to familiarize yourself with this manual and to learn how to use it properly and efficiently.
We assume that you have previously used an Allen-Bradley programmable controller, that you are familiar with its features, and that you are familiar with the terminology we use. If not, read the user manual for your processor before reading this manual.
In this manual, we refer to:
the individual ControlNet adapter module as the “adapter” or
the “module.”
the programmable controller as the “controller” or the
“processor.”
The contents of this manual are as follows:
What This Manual Contains
Title What’s Covered
Introducing the ControlNet Adapter
1
Modules
Installing Your ControlNet Adapter
2
Module
3 Addressing Modes for Your I/O Hardware addressing and configuration options
Planning to Use Your ControlNet
4
Adapter
5 Troubleshooting
Appendix
A Specifications Module specifications
A Practical Example of ControlNet
B
Concepts
Describes features, capabilities, and hardware components.
Procedures and guidelines for installing the module; including power requirements, location, setting switches, and actual installation.
How the adapter operates on ControlNet and information to assist in configuring your system.
Troubleshooting aids, including status display, health indicators and ControlNet status indicators
An example program and description thereof
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Terminology Used in This Manual
Use this term To describe
complementary module Configuration Manager node node responsible for distributing ControlNet configuration data to all nodes on the
ControlNet network a communication architecture that allows the exchange of messages between connection an opened communication path between two nodes on a ControlNet network
ControlNet status indicators channel A and channel B indicators on your node indicating status on the ControlNet DF1 protocol a peer-to-peer link-layer protocol that combines features of ANSI X3.28-1976
DH+ network (Data Highway Plus) discrete I/O data transfer type of data transfer in which single units of I/O have discrete relationships with values
drop cable a cable that connects a node to the trunk cable (this is an integral part of frame single data transfer on a ControlNet link
half–slot addressing a method of addressing where the processor can address its I/O in 1/2–slot I/O groups high–density i/o module a module that provides 16 input or 16 output terminals I/O Group an addressing unit that can contain up to 16 input terminals and 16 output terminals
I/O map table table that you configure using the programming software to map data from an I/O
link collection of nodes with unique addresses (in the range of 1-99). Segments map-table entry one entry in the I/O map table that you configure using the programming software to
maximum scheduled node node with highest network address that can use scheduled time on a ControlNet link maximum unscheduled node node with highest network address that can use unscheduled time on a ControlNet link network access port (NAP) port that provides a temporary network connection through an RJ-45 connector network a series of nodes connected by some type of communication medium. The
network address a node’s address on the network (this replaces MAC ID and node address). node port of a physical device connecting to the network which requires a network address
network update interval (NUI) single occurrence of the network update time (NUT) network update time (NUT) repetitive time interval in which data can be sent on the ControlNet network non-discrete I/O data transfer type of data transfer in which blocks of data transferred to or from I/O modules use
one–slot addressing A method of addressing where the processor can address its I/O in 1–slot I/O groups. parallel port an input/output port for a device that transmits multiple data and control bits over wires
PC An Allen–Bradley programmable controller, such as the PLC–5 PCCC Programmable Controller Communication Commands, an application-level command
processor a term used to mean an Allen–Bradley programmable controller quad–density i/o module a module that provides 32 input or 32 output terminals
redundant media dual cable system that allows you to receive the best signal over a network
The following list defines common terms used in this manual.
a module that performs an opposite function; an input module complements an output module and vice versa
network Allen-Bradley Company, Inc. products and certified third-party products
link specification subcategories D1 (data transparency) and F1 (two-way simultaneous
transmission with embedded responses) an Allen-Bradley local area network made up of one or more token-passing baseband links
in the processor’s data table; uses the processor’s input- and output-image tables (I and O files); configured on a per-node basis in the ControlNet I/O map table
1786 taps)
chassis and other devices on the ControlNet network to particular data-table file addresses
connected by repeaters make up a link; links connected by bridges make up a network map data from one I/O chassis (or other device on a ControlNet link) to particular
data-table file addresses
connection paths between any pair of nodes can include repeaters, routers, bridges and gateways
in order to function on the network — a link may contain a maximum of 107 nodes
integer input and output data-table files that you specify; cannot use the processor’s input- and output-image tables (I and O files); scheduled transfers are configured in the ControlNet I/O map table, unscheduled transfers make use of ControlNet I/O (CIO) transfer instructions
connected in parallel
set that Allen-Bradley programmable controllers use to communicate across networks
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Use this term To describe
repeater two-port active physical-layer device that reconstructs and retransmits all traffic it remote I/O link a serial link for carrying I/O data between a PLC or SLC processor/scanner and RS-232-C port a serial port that complies with accepted industry standard for serial binary scheduled transfers deterministic and repeatable transfers that are continuous and asynchronous to the segment trunk-cable sections connected via taps with terminators at each end; serial port a port that transmits/receives data and control bits sequentially over a single
standard–density i/o module a module that provides up to 8 input terminals or 8 output terminals tap a component that connects products to the ControlNet trunk cable. A tap is required
terminator a 75-ohm resistor (mounted in a BNC plug) placed on the ends of segments to prevent trunk cable bus or central part of a cable system.
trunk-cable section length of trunk cable between any two taps two–slot addressing a method of addressing where the processor can address its I/O in 2–slot I/O groups unscheduled transfers non-deterministic data transfers through ladder-initiated communication or
hears on one segment to another segment remote I/O adapters communication circuits in a point-to-point link ladder-logic program scan a segment does not include repeaters transmission line (see RS-232-C port)
for each node and for both sides of each repeater. reflections from occurring at the ends of cables.
programming devices
Conventions
We use these conventions in this manual:
In this manual, we show: Like this:
that there is more information about a topic in another chapter in this manual
that there is more information about the topic in another manual
More
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Product Compatibility
Product name
Processors PLC–5/20C15, PLC-5/40C15 and PLC-5/80C15 processors 1785-L20C15, 1785-L40C15,
Communication Devices
Universal I/O Chassis
I/O Modules Block transfer modules
Power Supplies System power supply
The 1771-ACN15 and 1771-ACNR15 adapter modules are two of many hardware components that make up a programmable controller system. The table below lists the hardware components and products with which you can use the adapter module.
Compatible Hardware Products
Description Catalog number
L80C15
ControlNet KTCx Communication Card ControlNet Serial/Parallel Communication Interface Flex I/O ControlNet Adapter 1771 ControlNet Adapter Module
4–slot 8–slot 12–slot 16–slot
8–point I/O Standard density I/O modules 16–point I/O High density I/O modules 32–point I/O Quad–Density I/O modules
Auxiliary power Supply Auxiliary Power Supply module (120V ac input, 3A) Auxiliary Power Supply module (120V ac input, 8A) Redundant Power Supply module Auxiliary Power Supply module (24V dc input, 8A) Auxiliary Power Supply module (220/240V ac input, 8A) Auxiliary Power Supply module (120/220V ac input, 16A) PLC–2 Power Supply (115V ac input) PLC–2 Power Supply (24V dc input) Local Power Supply Auxiliary Power Supply (24V dc input)
1784-KTC15x 1770-KFC 1794-ACN15, ACNR15 1771-ACN15, -ACNR15
1771–A1, –A1B 1771–A2, –A2B 1771–A3B, A3B1 1771–A4, –A4B
All modules that use the 1771 I/O structure
1771–P1 1771–P2 1771–P3 1771–P4, –P4S, –P4S1 1771–P4R 1771–P5 1771–P6S, –P6S1 1771–PS7 1772–P1 1772–P4 1774–P1 1777–P4
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Related Publications
Summary
For additional information on planning and installing your ControlNet system, see the following publications:
Publication
ControlNet PLC-5 Programmable Controllers (Phase 1.5) User Manual 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 for Noise
Immunity
Publication Number
1770-4.1
This preface gave you information on how to use this manual efficiently. Chapter 1 introduces you to the ControlNet remote I/O adapter module.
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Table of Contents
Introducing the ControlNet Adapter Module
Installing Your ControlNet Adapter Module
Chapter 1
Chapter Objectives Module
Description and Features Hardware Components Chapter Summary
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Chapter 2
Chapter Objectives Compliance
EMC Directive
Low V Determining Power Requirements Determining Setting
Address Switches
Setting the I/O Chassis Switches
Backplane Switch Assembly Setting Installing
Connecting Y Connecting Programming T Powerup Chapter Summary
to European Union Directives
oltage Directive
the Module Location and Keying the I/O Chassis
the Network
the I/O Chassis Power Supply Configuration Plug
the Adapter Module in the Chassis
Sequence
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our Adapter to the ControlNet Network
erminals to the Network via the NAP
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1–1 1–1 1–1 1–4
2–1 2–1 2–1 2–1 2–2 2–2
2–4 2–5 2–5 2–6 2–6 2–7
2–9 2–10 2–10
Addressing Modes for Your I/O
Chapter 3
Chapter Objectives Addressing Y
Using
I/O Using Using
Using
I/O
Using Addressing Summary Chapter Summary
our I/O 2-Slot Addressing Module Combinations
Standard-density I/O (8 point) Modules
High-density (16 point) I/O Modules 1-Slot Addressing Module Combinations 1/2- Slot Addressing
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3–1 3–1 3–3 3–3 3–4 3–6 3–7 3–9
3–9 3–1 3–1
1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Table of Contentsii
Planning to Use Your ControlNet Adapter Module
Troubleshooting
Chapter 4
Chapter Objectives Overview Discrete Configuring Discrete I/O Data Transfers Nondiscrete
Configuring Configuring Your ControlNet System Chapter Summary
of Adapter Operation
I/O Data T
I/O Data T Using ControlNet I/O (CIO) Instructions Mapping Directly Into Processor Memory Example: Example: Nondiscrete Output Module Communications
Nondiscrete I/O Data T
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ransfer
Nondiscrete Input Module Communications
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ransfers
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ransfers
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Chapter 5
Chapter Objectives Troubleshooting
OK Indicator and Display Mnemonics ControlNet
Chapter Summary
Status Indicators
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With the Status Indicators and Status Display
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4–1 4–1 4–2 4–2 4–3 4–3 4–4 4–4 4–5 4–6 4–6 4–6
5–1 5–1 5–2 5–3 5–3
Specifications
Appendix A
Specifications
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A–1
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Chapter Objectives
Module Description and Features
Chapter
1
Introducing the ControlNet Adapter Module
This chapter describes the ControlNet adapter modules’ (cat. no. 1771-ACN15 and -ACNR15):
features
hardware components, including
diagnostic indicators
communication reset pushbutton
network access port (NAP)
ControlNet connectors
network address switch assemblies
The 1771-ACN15 and -ACNR15 adapters control 1771 remote I/O on the ControlNet network. The ControlNet network is a communication architecture that allows the exchange of messages between Allen-Bradley products and certified third-party products.
Hardware Components
The 1771-ACN15 and -ACNR15 Adapters features include:
high speed data transfer
diagnostic messages
local communication network access through the network access
port (NAP)
redundant media (1771-ACNR15 only)
The adapter module consists of the following major components:
ControlNet status indicators
status display
communication reset pushbutton
network access port (NAP)
ControlNet connectors (one on the 1771-ACN15; two on the
1771-ACNR15)
module net address switch assemblies (on top of module)
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Introducing the ControlNet Adapter Module
Figure 1.1 ControlNet
Adapter Module
Module Network Address Switches (accessible thru top of module)
NET
ADDRESS
STATUS
OK OK
NET
ADDRESS
STATUS
Status Display and Net Address
OK Indicator
Diagnostic Indicators
Communication Reset Pushbutton
ControlNet Status Indicators Network Access Port (NAP)
A
ALLEN-BRADLEY
1771-ACN15
A
B
ALLEN-BRADLEY
1771-ACNR15
ControlNet Media Port
ControlNet Redundant Media Port (1771-ACNR15 only)
1771-ACN15 1771-ACNR15
Diagnostic Indicators
The OK indicator is located on the front panel of the adapter module (Figure 1.1). It shows both normal operation and error conditions in your remote I/O system.
Publication
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.
Communication Reset Pushbutton
This pushbutton is active whenever the status display shows RSET or PRL. PRL is active only when the I/O chassis backplane switch is in the PRL position. If the above conditions are met, you can use the reset pushbutton (Figure 1.1) to reset the adapter module and resume communication after a communication error occurs.
Network Access Port (NAP)
The network access port (Figure 1.1) provides a bidirectional electrical interface for programming, maintenance, and I/O
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Introducing the ControlNet Adapter Module
2
1–3
monitoring devices in both redundant and non-redundant connections. Connecting programming terminals to the network using the NAP is described in Chapter 2.
ControlNet Connectors
Cable connection to the module is through standard BNC connectors on the module frontplate.
Example
Terminator
of a Redundant System
Terminator
More
trunkline A =
trunkline B =
PLC-5/20C or PLC-5/40C
➊ End device supporting redundant cabling is a 1771-ACNR15.
A
B
end device
end device
Refer to the ControlNet Cable System Planning and Installation user manual, pub. no. 1786-6.2.1 for more information.
Terminator
Terminator
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’s Selection
Introducing the ControlNet Adapter Module
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 1.2 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.
Figure 1.2 Assigning
Address Switch Assemblies
the Network Number
One
Ten’s Selection
"
Chapter Summary
For optimum throughput, assign addresses to your ControlNet nodes in a sequential order starting with 02. Address 01 is reserved for the controlling processor on the network
In this chapter we discussed the functions and hardware components of the ControlNet Adapter Module.
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Chapter Objectives
Chapter
2
 
This chapter describes the procedures for installing your ControlNet adapter module. These include:
CE compliance
determining power requirements
determining the module location and keying the I/O chassis
setting the network address switches
setting the I/O chassis switches
setting the I/O chassis power supply configuration plug
installing the adapter module in the chassis
connecting programming terminals to the network via the
network access port (NAP)
powerup sequence
Compliance to European Union Directives
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 50081-2EMC – Generic Emission Standard, Part 2 –
Industrial Environment
EN 50082-2EMC – Generic Immunity Standard, Part 2 –
Industrial Environment
This product is intended for use in an industrial environment.
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.
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Installing Your ControlNet Adapter Module
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
Guidelines for Handling Lithium Batteries, publication AG-5.4
Automation Systems Catalog, publication B111
Determining Power Requirements
Determining the Module Location and Keying the I/O Chassis
The ControlNet adapter module requires a backplane current of 1.0A at 5V dc. Remember to add this amount to other current requirements for your I/O chassis.
The ControlNet adapter module must be installed in the leftmost slot of the I/O chassis.
The I/O chassis backplane connectors are keyed to accept only one type of module. This prevents accidental insertion of other modules in the wrong module slot.
Position the keying bands (Figure 2.1) in the backplane connectors to correspond to the key slots on the module. This prevents you from inserting the wrong module in this slot. For the ControlNet adapter module, position the keying bands:
between 54 and 56 on the upper connector, and
between 16 and 18 on the lower connector
ATTENTION: Observe the following precautions when inserting or removing keys:
!
insert or remove keys with your fingers
make sure that key placement is correct
Incorrect keying or the use of a tool can result in damage to the backplane connector and possible system faults.
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Installing Your ControlNet Adapter Module
You can change the position of these bands if subsequent system design and rewiring makes insertion of a different type of module necessary.
Figure 2.1 Keying
Band Positions
2–3
Place keying bands between:
54 and 56 on the upper connector
16 and 18 on the lower connector
I/O chassis
ATTENTION: Insert or remove
keying bands with your fingers.
Upper Connector
Keying Bands
Lower Connector
11022-I
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Installing Your ControlNet Adapter Module
Setting the Network Address Switches
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.
Use a small bladed screwdriver to rotate the switches.
Figure 2.2 Setting
the Network Address
Ten’
s Selection
Ten’
s Selection
NET ADDRESS
One’
For example, the 10’s selection switch is set to 10, and the 1’s selection switch is set to 5.
10 5
Then,
NOTE:
00 is an invalid number
plus
= 15
.
One’
s Selection
s Selection
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Installing Your ControlNet Adapter Module
2–5
Setting the I/O Chassis Switches
Processor Restart Lockout (PRL) – ON Processor can restart the I/O chassis
after a communication fault. Set this switch to ON if you plan to use I/O rack auto-configuration.
OFF The I/O chassis must be restarted at
the chassis.
Always OFF
You must set the I/O chassis backplane switches and power-supply configuration plug.
Backplane Switch Assembly
This switch assembly is located on the backplane of the I/O chassis. You use it to select:
the last state of all outputs
the processor restart lockout feature
1/2-, 1- or 2-slot addressing
Figure 2.3 I/O
Chassis Backplane Switch Assembly Settings for ControlNet
Adapter Module in PLC-5/20C and PLC-5/40C Processor Systems
O
O
N
F
F
12345678
Last State Switch ­ON Outputs of this chassis remain in last state when a
communication fault is detected by the adapter.
OFF Outputs of this I/O chassis are deenergized when a
communication fault is detected by this adapter
Always OFF
ATTENTION:
connected to this chassis remain in their last state when a fault occurs and machine motion may continue after fault detection. We recommend that you set switch 1 to the OFF position to deenergize outputs wired to this chassis when a fault is detected.
Addressing Switches 5 6
OFF ON You select 1/2-slot addressing ON OFF You select 1-slot addressing OFF OFF You select 2-slot addressing ON ON Not allowed
If switch 1 is set to the ON position, outputs
10802-I
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Installing Your ControlNet Adapter Module
Setting the I/O Chassis Power Supply Configuration Plug
Set the I/O chassis power-supply configuration plug (Figure 2.4) to identify the type of power supply you are using with your remote chassis. This configuration plug is located on the backplane of 1771-A1B through -A4B or later I/O chassis.
Figure 2.4 1771
I/O Chassis Power Supply Configuration Plug Settings
For Use With: Set Chassis Configuration Plug to:
YNN
power supply module installed in chassis
external power supply in your remote system
“Y” position
Y
“N” position
I/O Chassis
Power Supply
Configuration
Plug
YN
USING
SUPPL
POWER MODULE IN THIS CHASSIS?
Y
Installing the Adapter Module in the Chassis
More
locking-bar pins
front of chassis
12453-I
Once you’ve determined the power requirements and keying for your adapter module, and have set the appropriate switch assemblies, you can use the following procedure to install it.
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. On chassis equipped with a chassis locking bar, pull the
locking-bar pins to release the locking bar and swing it up. If installing in an earlier chassis, lift the module locking latch up.
3. Place the module in the plastic tracks on the top and bottom of the
leftmost slot. These tracks guide the module into position.
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4. Press firmly and evenly to seat the module in its backplane
connectors.
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Installing Your ControlNet Adapter Module
2–7
ATTENTION: Do not force the module into the backplane connector. If you cannot seat the module
!
with firm pressure, check the alignment and keying. Forcing the module can damage the backplane connector or the module.
5. Snap the chassis locking bar (or locking latch on earlier chassis)
over the top of the module to secure it. Make sure the locking pins on the locking bar are fully engaged.
Note: The chassis locking bar will not close if all modules are not properly seated.
Connecting Your Adapter to the ControlNet Network
You connect your 1771-ACN15 or -ACNR15 adapter module to a ControlNet network via taps. These taps are available:
Straight T-tap Straight Y-tap Right-angle T-tap Right-angle Y-tap
1786-TPS 1786-TPYS 1786-TPR 1786-TPYR
Important: Taps contain passive electronics and must be purchased
from Allen-Bradley for the network to function properly.
1. Remove the tap’s dust cap (located on the straight or right
angle connector).
If
your node supports: Connect the tap’s straight or right angle connector:
Non-redundant media to the channel A connector on the 1771-ACN15 or 1771-ACNR15
(channel B on the 1771-ACNR15 is not used)
Redundant media
While
both channels are active, Allen-Bradley recommends using channel A for non-redundant media.
from trunkline A to channel A on the 1771-ACNR15
from trunkline B to
channel B on the 1771-ACNR15
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segment 1
segment 2
Installing Your ControlNet Adapter Module
!
dust
cap
2. Remove and discard the dust caps from the adapter BNC jacks.
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.
tap
20093-I
3. Connect this tap’s straight or right angle connector to the
A
BNC connector on the adapter.
segment 1
tap
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.
20093-I
4. For redundant adapters (1771-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).
tap
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dust cap
20093-I
Installing Your ControlNet Adapter Module
5. Connect this tap’s straight or right angle connector to the B
BNC connector on the adapter.
2–9
Connecting Programming Terminals to the Network via the NAP
segment 1
tap
segment 2
tap
20093-I
After terminating your segments, you connect your node to the network.
You can connect programming terminals to the ControlNet network by connecting to the network access port (NAP). Two methods are shown below.
Using 1784-KTC or -KTCx communication card and NAP Using 1770-KFC communication interface and NAP
Programming Terminal
OK
Programming Terminal
1784-KTC15 or -KTCx15
1786-CP
A
B
ALLEN-BRADLEY
1771-ACNR
Serial or Parallel Connection
1770-KFC
1786-CP
ControlNet
product
ControlNet Network
The
1786-CP cable can be plugged into any ControlNet product’ programming capability on the ControlNet network. A programming terminal connected through this cable is counted as a node and must have a unique address.
ControlNet Network
s NAP to provide
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.
ALLEN-BRADLEY
ControlNet
product
OK
A
B
1771-ACNR
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Installing Your ControlNet Adapter Module
Powerup Sequence
NET
ADDRESS
STATUS
Status
OK
OK Indicator
Reset pushbutton Channel A and B
indicators
Look carefully at the status display and OK indicator when powering up the module. These indicators provide meaningful information on proper module operation.
1. Apply power to the chassis – the OK indicator should not light.
2. The module runs a power on self test (POST). During this test,
the status displays 0000 through 8888.
3. If the OK indicator is red, and the display shows POST-RSET,
then POST has failed. a. Press the reset pushbutton to reset.
The module reruns the POST program. If POST-RPLC appears on the status display again, POST has failed again.
b. Replace the module.
4. If: a. the OK indicator begins to blink green, and
b. the series/revision level of the module is displayed in the
status window (e.g. A/A, A/B, etc.), and
c. the channel A and B indicators blink alternately, the module
has passed POST.
INIT A#nn
IDLE A#nn
If the indications are neither of those indicated in 3 or 4, refer to chapter 5, “Troubleshooting.”
5. The module status displays INIT-A#nn (where nn is the node number of module).
6. The channel indicators indicate network condition as shown in the indicator table in chapter 5.
7. Then the display shows IDLE-A#nn (where nn is the node number of module), indicating a successful configuration by the ControlNet Configuration Manager.
For detailed information on planning and installing your ControlNet system, see the following publications:
More
Publication Publication Number
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
Chapter Summary
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In this chapter you learned how to install your adapter module. Chapter 3 tells you how to address your I/O.
ЙЙЙЙЙЙ
Chapter Objectives
Addressing Your I/O
Chapter
3

In this chapter, you will learn:
addressing your I/O
using 2-slot addressing, including:
I/O module combinations
using standard-density I/O (8 point) modules
using high-density (16 point) I/O modules
using 1-slot addressing, including:
I/O module combinations
using 1/2- slot addressing
addressing summary
Programmable controllers that use the ControlNet adapter module can address their I/O in 2-slot, 1-slot or 1/2 slot I/O groups. These three addressing methods are referred to as 2-slot addressing, 1-slot addressing and 1/2-slot addressing.
You select the addressing method with switch 5 and 6 in the I/O chassis backplane switch assembly. You make this selection for each chassis independently with only one method of addressing for each chassis.
For each I/O chassis in your system, you must define how many I/O chassis slots make up an I/O group (1 word each in the input image table and output image table); this choice is the chassis’ addressing mode. Choose from among these available modes:
2-slot addressing
2 I/O chassis slots = 1 I/O group = 1 input image word and 1 output image word = 16 input bits and 16 output bits.
1-slot addressing
1
I/O chassis slot = 1 I/O group = 1 input image word and 1 output image word = 16 input bits and 16 output bits.
1/2-slot addressing
1/2
of an I/O chassis slot = 1 I/O group = 1 input image word and 1 output image word = 16 input bits and 16 output bits.
16
bits input
16 bits input and 16 bits output
16 bits input and 16 bits output
16 bits output
Processor Memory
Rack #
Output Image Table
Word #
x x x x x x x x
Input Image Table
Word #
x x x x x x x x
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Addressing Modes for Your I/O
I/O groups are made up of I/O terminals (Figure 3.1). An I/O group is an addressing unit that can contain up to 16 input terminals and 16 output terminals. You select an I/O chassis to have either 2-slot, 1-slot or 1/2-slot I/O groups.
Figure 3.1 An
Input Terminals
00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17
I/O Group - Up to 16 Input T
erminals and 16 Output T
Output or
00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17
Input Terminals
00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17
Output Terminals
erminals
2-slot
I/O Group
1-slot I/O Group
13073
I/O racks are made up of I/O groups (Figure 3.2). An I/O rack is an addressing unit that can contain up to eight I/O groups.
Figure 3.2 An
I/O Rack - Up to Eight I/O Groups
01234567
Power
Source Not Indicated
13074
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Addressing Modes for Your I/O
3–3
Using 2-Slot Addressing
Definition: The processor addresses two I/O module slots as one I/O group.
Concept: Each physical 2-slot I/O group is represented by a word in the input image table and a word in the output image table. Each input terminal corresponds to a bit in the input image table word and each output terminal corresponds to a bit in the output image table word.
The maximum number of bits available for one 2-slot I/O group is 32: 16 bits in the input image table and 16 bits in the output image table. The type of module you install (either 8 or 16-point I/O) determines the number of bits in the words that are used.
You select 2-slot addressing by setting switches 5 and 6 of the I/O chassis backplane switch assembly to the OFF position as shown in Chapter 2.
I/O Module Combinations
The combination of I/O modules you can use depends on the addressing method and I/O chassis you select.
Table 3.A lists acceptable I/O module combinations with 2-slot addressing.
T
able 3.A
I/O
Module Combinations W
I/O Chassis
Series
A, B 2 8-point input modules 16 0
B or later only 1 16-point input and output module 16 16
I/O Module Combinations Per I/O Group
2 8-point output modules 0 16 1 8-point input and output module 8 8 1 8-point input and 1 nondiscrete module 16 8 1 nondiscrete and 1 8-point output module 8 16 2 nondiscrete modules 16 16
1 16-point input and 1 8-point output module 16 8 1 8-point input and 1 16-point output module 8 16
ith 2-slot Addressing
Data Table Bits Used
Input Image Table Output Image Table
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Addressing Modes for Your I/O
Using Standard-density I/O (8 point) Modules
Standard-density I/O modules provide eight input terminals or eight output terminals. Figure 3.3 illustrates the 2-slot I/O group concept with two 8-point input modules. Figure 3.4 shows an 8-point input module and an 8-point output module in a 2-slot I/O group.
Figure 3.3 Two Table
8-point Input Modules Using One Word of the Input Image
2-slot I/O Group
Input Terminals
00 01 02 03 04 05 06 07
Output image table word corresponding to the I/O group.
17 16 15 14 12
Input image table w ord corresponding to the I/O group.
17 16 15 14 12
13
13
11
unused
11
10
10
07
07
06
06
Input Terminals
10 11 12 13 14 15 16 17
04
05 03
04
05 03
02 01
00
02 01 00
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Addressing Modes for Your I/O
Figure 3.4 8-point
Input and Output Modules Using Eight Bits of the Input
Image Table W
ord and Eight Bits of the Output Image T
2-slot I/O Group
able W
3–5
ord
Input Terminals
00 01 02 03 04 05 06 07
Output image table word corresponding
17 16 15 14 12
Output bits used
Input image table w ord corresponding
17 16 15 14 12
13
13
11
11
10
10
Output Terminals
06
07
06
07
10 11 12 13 14 15 16 17
05 03
04
unused
04
05 03
to the I/O group.
02 01 00
to the I/O group.
02 01
00
Always 0
Input bits used
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Addressing Modes for Your I/O
Using High-density (16 point) I/O Modules
16-point I/O modules provide 16 input terminals or 16 output terminals. 16-point I/O modules use a full word in the input or output image table when they are addressed as a 2-slot I/O group (Figure 3.5). Two 16-point modules (one input and one output) can be used in a 2-slot I/O group.
Figure 3.5 16-point
Input and Output Modules Using T
wo W
ords of the Image T
2-slot I/O Group
able
Inp ut Terminals
00 01 02 03 04 05 06 07 10 11 12 13 14 15 16
17
Output image table w ord corresponding to the I/O g r ou p .
06
07
17
16 15 14 12
Input image table word corresponding to the I/O g ro u p .
17 16 15 14 12
13
13
11
11
10
10
07
06
Output Terminals
05 03
04
04
05 03
00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17
02 01 00
02 01
00
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Because these modules use a full word in the image table, the only type of module you can use in a 2-slot I/O group with a 16-point module is one that performs the opposite (complementary) function; an input module complements an output module and vice-versa.
You can use an 8-point module with a 16-point module in a 2-slot group; it must perform the opposite function. However, eight bits in the I/O image table are unused.
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Addressing Modes for Your I/O
3–7
Using 1-Slot Addressing
Definition: The processor addresses one I/O module slot as one I/O group.
Concept: The physical address of each I/O group corresponds to an input and output image table word. The type of module you install (8, 16, or 32-point) determines the number of bits in these words that are used.
You select 1-slot addressing by setting switches 5 and 6 of the I/O chassis backplane switch assembly as shown in Chapter 2:
switch 5 to the ON position
switch 6 to the OFF position
With 1-slot addressing, because 16 input AND 16 output bits are available in the processor’s image table for each I/O slot, you can use any mix of 8-point, 16-point or nondiscrete I/O modules in the I/O chassis.
To use 32-point I/O modules with 1-slot addressing, you must install, as a pair, an input module and an output module in 2 adjacent slots of the I/O chassis beginning with I/O slot 0 (Figure 3.6). If you cannot pair the modules in this way, one of the two slots of the pair must be empty. For example, if I/O slot 0 holds a 32-point input module, I/O slot 1 can hold an 8, 16, or 32-point output module (or a module that uses the backplane for power only); otherwise, it must be empty.
Figure 3.6 Using
32-point I/O Modules with 1-slot Addressing
Input/Output Pairs
I/O
I/O
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
I/O I/O
I/O Chassis Slot Number
I/O I/O
I/O
I/O
14973
Thirty-two-point I/O modules need 32 input or 32 output bits in the processor’s image table. Because only 16 input and 16 output bits are available for each I/O group, to address a 32-point I/O module, the ControlNet adapter module uses the unused input or output word associated with the adjacent I/O slot.
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Addressing Modes for Your I/O
When the 1771-ACN15/ACNR15 ControlNet adapter module addresses a 1-slot I/O group containing a 32-point I/O module, the adapter module uses the unused word assigned to the adjacent I/O module slot. For example, the adapter module uses the unused input word associated with I/O slot 1 (because that slot must hold an output module and does not use its input word).
Figure 3.7 illustrates the concept of 1-slot addressing with two 32-point I/O modules.
Figure 3.7 1-slot
I/O Group Concept With 32-point I/O Modules
32–point I/O M odules
Image Table Wor ds Allo c ated for I/O Gro u p 0
Inp u t Wo rd 0
Slot 0
Input Module
I/O G ro u p 0
Slot 1
Output M odule
I/O G ro u p 1
Output W ord 0
Image Table Wor ds Allo c ated for I/O Gro u p 1
Inp u t Wo rd 1 Output W ord 1
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Addressing Modes for Your I/O
I/O Module Combinations
The combination of I/O modules you can use depends on the addressing method and I/O chassis you select.
The table below lists acceptable I/O module combinations with 1-slot addressing.
T
able 3.B
I/O
Module Combinations W
ith 1-slot Addressing
3–9
I/O Chassis
Series
A, B 1 8-point input module 8 0
B or later only
I/O Module Combinations Per I/O Group
1 8-point output module 0 8 1 8-point input and output module 8 8 1 8-point input and 1 nondiscrete output module 16 8 1 nondiscrete input and 1 8-point output module 8 16 1 nondiscrete module 8 8 any mix of 8, 16 and 32-point input and output
modules (when using 32 point modules, install in pairs – input and output in each group)
any mix of 8 and 16-point modules, and nondiscrete or intelligent modules
Data Table Bits Used
Input Image Table Output Image Table
16 16
16 16
Using 1/2- Slot Addressing
Definition: The processor addresses one-half of an I/O module slot as one I/O group.
Concept: The physical address of each I/O slot corresponds to two input and two output image table words. The type of module you install (8-, 16-, or 32-point) determines the number of bits in these words that are used.
You select 1/2-slot addressing by setting switches 5 and 6 of the I/O chassis backplane switch assembly as shown in Chapter 2:
switch 5 to the OFF position
switch 6 to the ON position
With 1/2-slot addressing, since 32 inputs bits AND 32 output bits are available in the processor’s image table for each I/O group, you can mix 8-point, 16-point, 32-point and nondiscrete modules in any order in the I/O chassis.
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32–pointInput M odul
Addressing Modes for Your I/O
Figure 3.8 illustrates the 1/2-slot addressing concept with a 32-point I/O module. A 32-point I/O module (with 1/2-slot I/O groups) uses two words of the image table. When you use 8 and 16-point I/O modules with 1/2-slot addressing, you get fewer total I/O points.
Figure 3.8 1/2-slot
Input
#
01 03 05
1/2–slot
I/O Group
0
1/2–slot
I/O Group
1
07
– 11 13 15 17
– 01 03 05
07
– 11 13 15 17
Addressing Concept
e
Input
#
00 02 04 06
1/2–slot
I/O G ro up
10 12 14 16
00 02 04 06
10 12 14 16
0
1/2–slot
I/O G ro up
1
Input Word 0
17 010 7
Output W ord 0
17 10 07
Unused
Input Word 1
17 10 07
Output W ord 1
17 10
Unused
Image Table W ords A llocated for I/O G r o up 0
Image Table W ords A llocated for I/O G roup 1
07
T
able 3.C
I/O Chassis
Series
I/O Module Combinations W
I/O Module Combinations Per I/O Group
ith 1/2-slot Addressing
Data Table Bits Used
Input Image Table Output Image Table
A, B 1 8-point input module 8 0
1 8-point output module 0 8 1 8-point input and output module 8 8 1 8-point input and 1 nondiscrete output module 16 8 1 nondiscrete input and 1 8-point output module 8 16 1 nondiscrete module 8 8
B or later only any mix of 8, 16 and 32-point input and output modules,
16 16
nondiscrete modules, and intelligent modules
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1Addressing Modes for Your I/O
Addressing Summary
Use this table as a quick reference for addressing.
Addressing
Mode
2-slot
1-slot
1/2-slot
Two I/O module slots = 1 group
Each physical 2-slot I/O group corresponds to one word (16 bits) in the
input image table and one word (16 bits) in the output image table
When you use 16-point I/O modules, you must install as a pair an input module and an output module in an I/O group; if you use an input module in slot 0, you must use an output module in slot 1 (or it must be empty). This configuration gives you the maximum use of I/O.
You cannot use a nondiscrete module and a 16-point module in the same I/O group because nondiscrete modules use 8 bits in both the input and output table. Therefore, 8 bits of the 16-point module would conflict with the nondiscrete module.
You cannot use 32-point I/O modules.
One I/O module slot = 1 group
Each physical slot in the chassis corresponds to one word (16 bits) in the
input image table and one word (16 bits) in the output image table
When you use 32-point I/O modules, you must install as a pair an input module and an output module in an even/odd pair of adjacent I/O group; if you use an input module in slot 0, you must use an output module in slot 1 (or it must be empty). This configuration gives you the maximum usage of I/O.
Use any mix of 8- and 16-point I/O modules, nondiscrete or intelligent modules in a single I/O chassis. Using 8-point modules results in fewer total I/O.
One half of an I/O module slot = 1 group
Each physical slot in the chassis corresponds to two words (32 bits) in the
input image table and two words (32 bits) in the output image table
Use any mix of 8-, 16-, and 32-point I/O or nondiscrete and intelligent modules. Using 8-point and 16-point I/O modules results in fewer total I/O.
With the processor-resident local rack set for 1/2-slot addressing, you cannot force the input bits for the upper word of any slot that is empty or that has an 8-point or 16-point I/O module. For example, if your have an 8-point or a 16-point I/O module in the first slot of your local rack (words 0 and 1 of the I/O image table, 1/2-slot addressing), you cannot force the input bits for word 1 (I:001) on or of However, in a remote chassis using a 1771-ACN15 or -ACNR15 adapter, all points can be forced, including those not physically present. In the example above, chassis word I:001 can be forced on or off.
Guidelines
f.
Chapter Summary
In this chapter we discussed how to address your hardware and the various remote I/O configurations and options you can use in your remote system.
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Addressing Modes for Your I/O
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es
er
Chapter Objectiv
Chapter
4
Planning to Use Your ControlNet Adapter Module
This chapter explains how the adapter operates on ControlNet and provides information to assist in configuring your system. This includes:
overview of adapter operation
discrete I/O data transfer
configuring discrete I/O data transfers
nondiscrete I/O data transfers
using ControlNet I/O (CIO) instructions
mapping directly into processor memory, including examples of
nondiscrete input module and output module communication
configuring nondiscrete I/O data transfers
Overview of Adapt Operation
The controlling processor (network address 01) on ControlNet contains an I/O map table. This map table stores the information necessary for communications to be established. Each map table entry corresponds to 1 transfer of data between the processor and an I/O rack, or between the processor and another ControlNet processor. The information in each map table is used to open a logical “connection” between 2 devices.
Connections are established between the processor and each adapter to exchange input and output data on the network. Status information is transferred along with the I/O data and is stored in a separate status file in the specified processor. Refer to the ControlNet PLC–5 Programmable Controller (Phase 1.5) User Manual, publication 1784-6.5.22, for more on status information available.
Important: The processor compares the specified module type (in
the map table) with the device with which communication is being attempted. Therefore, when changing from a 1771-ACN15 to a 1771-ACNR15, or vice versa, you must specify the new module type in the map table.
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Discrete I/O Data Transfer
Planning to Use Your ControlNet Adapter Module
All 1771 discrete I/O data is mapped into the processor’s I/O image table according to the user-configurable I/O map table stored in the processor. This image table location is specified on the ControlNet configuration screen.
Configuring Discrete I/O Data Transfers
ControlNet provides significant flexibility when configuring discrete I/O data transfers. The following are important factors to consider as you plan and configure your system.
I/O is not automatically mapped into the processor’s I/O image
file based on the network address of the adapter. If you manually configure your system, I/O from an adapter is mapped into the I/O image file based on the I/O image file address that you enter into your configuration. If you automap your system, I/O is mapped into the first available I/O image space outside of the local rack image space.
For example, if your local chassis is 12 slots and is using 1-slot addressing mode, it will use rack numbers 0 and 1. ControlNet I/O mapping would then start with rack 2. Note that even though the local chassis only used 1/2 of rack 1, ControlNet I/O cannot map into any rack number used by the local chassis.
Always configure your remote I/O system first. Remote I/O
devices must use the I/O image space which corresponds to their rack number and size. A conflict could occur if you automap ControlNet first, and it uses I/O image space which matches a rack number on the remote I/O. Automap remote I/O first, and then automap ControlNet, since ControlNet can use any unused I/O image space.
I/O image space for a given ControlNet connection must be
contiguous. ControlNet software cannot break up a map entry into multiple I/O image file locations.
For example, if you automap a device which requires 4 words of I/O image table, it will map into the first available 4 word block in the I/O image table, even if there are several 2 word blocks available prior to the 4 block area.
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All 1771 I/O placement rules for discrete I/O module (8, 16 and
32 point) addressing still apply.
You can configure the adapter to scan a minimum of 0 input
words to a maximum of 32 input words in the physical rack. Data from input modules in the chassis beyond the configured rack size will not be sent to the processor.
You can configure the adapter to write to a minimum of 0 output
words to the maximum number of words in the the physical rack (up to 32 maximum). Modules in the chassis beyond the configured rack size will not receive outputs from the processor, and will respond as if they were receiving all zeroes.
More
screte I/O Data
Planning to Use Your ControlNet Adapter Module
4–3
The number of input words and output words do not have be the
same for an adapter.
Update times (Expected Network Packet Times) are not required
to be the same for all remote racks in the system. Update times can be selected based on your application requirements.
Refer to the PLC-5 ControlNet programmable controller manual or 6200 Software manuals for more information on the ControlNet configuration screens.
Nondi Transfers
More
There are 2 methods for data transfer to and from 1771 nondiscrete I/O modules on ControlNet:
ControlNet I/O (CIO) instructions
mapping directly into the processor’s memory
Using ControlNet I/O (CIO) Instructions
By programming CIO instructions into your ladder logic, you can either read or write data to or from a module. The CIO instruction is only active when the processor is in the RUN mode. This method uses the unscheduled portion of the Network Update Interval (NUI) to complete the transfers.
Refer to the ControlNet PLC–5 Programmable Controller (Phase
1.5) User Manual, publication 1784-6.5.22, for more information on CIO instructions.
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Planning to Use Your ControlNet Adapter Module
Mapping Directly Into Processor Memory
ControlNet also allows mapping 1771 nondiscrete I/O modules directly into processor memory. This eliminates the need for programming CIO or other transfer instructions in your ladder program. When you map a nondiscrete I/O module, the processor opens a connection to the adapter. Data is produced and/or consumed over the network, continuously and asynchronous to the ladder logic program scan. At the adapter, nondiscrete transfers are initiated to the module in its resident chassis asynchronous to the network activity. Once configured, these data transfers are active in all processor modes (RUN, PROG, and TEST).
Example: Nondiscrete Input Module Communications
PLC-5/40C
1
2
4
3
Empty
1771 8 Point In
1771-IXHR
1771-P4S
"
01234567
01234567
Nondiscrete
Input Module
1. The processor opens a connection to the adapter for consuming
the data from the nondiscrete module. The processor requests the adapter to produce the module’s data at the Actual Network Packet Time shown in the configuration.
2. Upon receiving the request, the adapter starts initiating
continuous read requests to the module. This occurs asynchronous to any activity on the network.
3. The module processes the read requests and responds to the
adapter as fast as it can.
4. The adapter produces the most recently received copy of the
module’s data on the network at the Actual Network Packet Time.
Note: If the nondiscrete input module can only respond to read requests every 50ms, and you set your update time to 10ms, the adapter will be sending 5 copies of each data block.
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PLC-5/40C
Planning to Use Your ControlNet Adapter Module
Example: Nondiscrete Output Module Communications
1
3
2
1771 8 Point In
Empty
1771-OFE
4–5
1771-P4S
01234567
01234567
Nondiscrete
Output Module
1. The processor opens a connection to the adapter for producing the
data for the nondiscrete module.
2. The processor produces the most recent copy of the designated
data table value you specified in your configuration onto the network at the Actual Network Packet Time.
3. The adapter consumes the packet from the processor, and initiates
a nondiscrete write transfer to the output module. Only 1 nondiscrete write transfer is active to any module at a time.
Nondiscrete I/O data is stored in integer files that you specify in your ControlNet configuration screen. Each map entry for a nondiscrete I/O data transfer defines an offset into the Data Input File (DIF) or Data Output File (DOF) where data is stored.
Using separate data table files for nondiscrete I/O data transfer allows the processor to present nondiscrete I/O data in the same manner as discrete I/O data – continuously transmitted and asynchronous to the ladder logic program scan.
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4–6
hapter Su
ary
Planning to Use Your ControlNet Adapter Module
Configuring Nondiscrete I/O Data Transfers
The following are important factors to consider when planning and configuring nondiscrete I/O modules:
You can communicate with nondiscrete I/O modules anywhere in
the rack, including slots that are not mapped into the discrete I/O image files. Note that nondiscrete I/O modules can be placed so no I/O image space is used.
For example, in an 8-slot chassis with 1-slot addressing, you can place discrete modules in the first 4 slots and only map 4 words of I/O image table. Y
ou could then place nondiscrete modules in the last 4 slots
without using more I/O image space.
Slots in the adapter are physically referenced starting at 0 and
continuing by 1 up to a maximum of 15 (depending on the size of your chassis) regardless of the addressing mode (2, 1, or 1/2) used within the chassis.
The explicit ControlNet I/O transfer instruction (CIO) can also be
included in your ladder logic program to communicate with nondiscrete I/O modules.
One or more connections are required per module, depending on
the type of module. A separate connection is used for a read or write.
Modules accommodated by the processor’s nondiscrete I/O data
transfer mechanism are typically those that require a one-time configuration and are continuously read from or written to.
More
Configuring Your ControlNet System
C
mm
Refer to the ControlNet PLC–5 Programmable Controller (Phase
1.5) User Manual, publication 1784-6.5.22, for more information on
supported nondiscrete I/O modules.
Use the following software packages to configure your ControlNet system.
Use To
define network parameters, such as:
network update time
RSNetworx
media redundancy
physical media configuration
maximum scheduled nodes
maximum unscheduled nodes
RSLogix5 enter channel 2 ControlNet configuration
In this chapter, you learned about adapter operation, discrete I/O data transfer, configuring discrete I/O data transfer, nondiscrete I/O data transfer, and configuring nondiscrete I/O data transfer. In addition, you learned some important factors about nondiscrete I/O data transfers.
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Chapter Objectives
Troubleshooting With the Status Indicators and Status Display
Chapter
5

In this chapter, you will learn how to use the indicators on the module frontplate for troubleshooting the module. This includes:
troubleshooting with the status indicators and status display,
including:
OK indicator and display mnemonics
ControlNet status indicators
The module has indicators on the front plate, as shown below. These indicators consist of:
OK indicator
status indicators
display of status and address
Use these indicators for troubleshooting the module.
NET
ADDRESS
STATUS
OK
1771-ACN15 1771-ACNR15
NET
ADDRESS
STATUS
Status Display and Net Address
OK
OK Indicator
ControlNet Status Indicators
The following tables describe problems that may occur, probable causes, and recommended courses of action.
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5–2
T
Descr
n
Probable Cause
Rec
n
OK Indicator and Display Mnemonics
Display
OK
Indicator
OK
Red/ Green
Mnemonic
NET
ADDRESS
STATUS
iptio
ommended Actio
Off Of
f
Blinking Red
Red
Blinking Green
Check power supply, cable
None Module not communicating
Power supply fault
connectors, and seat adapter firmly in chassis.
Defective adapter Contact Allen-Bradley service.
POST Adapter is running Power On Self Test None None CODE
UPDT
POST RSET
A#00 ERR
MOD ERR
RACK ERR
PRL
SHRT BP
DUPL NODE
SW ERR
Firmware update mode.
Module failed Power On Self Test
Illegal ControlNet address. Network address set to 00.
I/O module placement error.
Illegal backplane switch settings. Illegal addressing mode selected. Adapter in processor restart lockout
mode. (Adapter to processor link is normal.)
Communication on link. Excessive noise on backplane or possible shorted backplane
Duplicate node.
Switch error.
Adapter firmware is being updated via A-B Flash Update Utility.
RAM or FLASH test failed. Processor fault or watchdog timeout.
Incorrect I/O module density for addressing mode used.
Processor restart lockout switch on chassis backplane in on position.
I/O module or chassis backplane bad.
Another adapter with the same ControlNet address is on the link.
Network address switches have been changed since module powerup.
None
Push the reset pushbutton on the front of the module.
Power down the adapter and change the network address switches.
Place I/O module in correct slot in chassis.
Power down the adapter and change the backplane switches.
Depress reset button on module to clear lockout feature, or cycle power.
Replace module or chassis as necessary.
Power down the adapter and change the network address switches to correct node.
Set network address switches to correct address and cycle power to the adapter.
RAM or FLASH test failed.
RPLC Fatal Power On Self Test failure.
Processor fault or watchdog timeout.
Contact Allen-Bradley service.
None Hardware fault. Defective hardware.
No communication with
INIT Requires ControlNet configuration.
ControlNet Configuration
Manager node. IDLE Processor not actively controlling I/O. Adapter not mapped. NET
ERR
Nework error.
Cable error or no other nodes on
network.
Verify Configuration Manager node is operating.
Verify mapping of adapter in processor.
Verify network cabling.
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OK Indicator
las ing g n o
OK Indicator
Red/
Red/
OK
OK
Green
Green
Display
Display
Mnemonic
Mnemonic
NET
NET
ADDRESS
ADDRESS
STATUS
STATUS
Description
Description
Probable Cause
Probable Cause
5–3
Recommended
Recommended Action
Action
Green
RUN
PRGM
Normal indication – processor is in RUN mode.
Normal indication – processor is in program or test mode.
Blinking alternately red
BOOT Running boot code. Adapter has corrupted firmware.
and green
ControlNet Status Indicators
A
and
Off No power None or power up Steady red Faulted unit Cycle power or reset unit
Alternating red/green Self-test None Alternating red/off Incorrect node configuration Check network address and other ControlNet configuration
None None
None None
Update adapter firmware with A-B Flash Update Utility.
steady
indicator is on continuously in the defined state.
alternating – the two indicators alternate between the two defined states at the same time (applies to both indicators viewed together). The two indicators are always in opposite states, out of phase.
flashing – the indicator alternates between the two defined states (applies to each indicator viewed independent of the other). If both indicators are flashing, they must flash together, in phase.
B
Cause Action
If fault persists, contact A-B representative or distributor.
parameters
A
Off Channel disabled Program network for redundant media, if required Steady green Normal operation None Flashing green/off Temporary errors None; unit will self-correct
Flashing red/off Media fault Check media for broken cables, loose connectors, missing
Flashing red/green Incorrect network configuration Cycle power or reset unit
➀ The
Chapter Summary
B
or
Cause Action
Node is not configured to go on line
Make sure the configuration manager node is present and working
terminators, etc.
No other nodes present on
Add other nodes to the network
network
If fault persists, contact A-B representative or distributor.
configuration manager node is the node responsible for distributing ControlNet configuration data to all nodes on the network.
In this chapter you learned how to use the indicators on the front of the module to troubleshoot your module.
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5–4
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

Module Location 1771 I/O chassis, leftmost slot
Quad shield RG-6 coaxial cable – Refer to the
Interconnect Cable
Power Dissipation 5 Watts Thermal Dissipation 17.06 BTU/hr Backplane Current 1.0A @ 5V
Keying Environmental Conditions
Operational Temperature Storage Temperature Relative Humidity
ControlNet Cable System manual (pub. no. 1786-6.2.1) for more information
Upper connector: between 54 and 56 Lower connector: between 16 and 18
0o to 60oC (32o to 140oF) –40o to 85oC (–40o to 185oF) 5% to 95% (without condensation)

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A–2
Specifications
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Index
A
addresses, addressing
1–slot, 3–7 1/2–slot, 3–9
2–slot, 3–3
guidelines for selecting addressing I/O groups, 3–2
addressing hardware, 3–1
assigned, 1–4
with 32–point modules, 3–8
using 16–point modules, 3–6 with 8–point modules, 3–4
modes, 3–1
1
B
backplane current, 2–2 backplane switch assembly
description, 2–5 settings for PLC–5/15, 2–5
C
catalog numbers
1786-TPR, 2–7 1786-TPS, 2–7 1786-TPYR, 2–7
1786-TPYS, 2–7 CE compliance, 2–1 chassis locking bar chassis switches, setting, 2–5 CIO instructions, using, 4–3 components, hardware, 1–1 configuration plug
I/O chassis power supply
power supply configuring system, software packages for
4–6
connecting to network, programming
terminal, 2–9 connectors, ControlNet, 1–3 current, backplane, 2–2
, 2–6
, 2–6
, 2–5
nondiscrete I/O, 4–3
diagnostic indicators, 1–2
alphanumeric display OK, 1–2
display mnemonics, 5–2
E
EMC directive, 2–1 European directives, compliance to, 2–1
F
factors to consider
, 4–2
G
groups, I/O, 3–2 guidelines, addressing mode selection,
3–11
I
I/O addressing, 3–1 I/O combinations
1-slot addressing, 3–9 1/2-slot addressing, 3–10
2-slot addressing, 3–3 I/O groups, 3–2 I/O map table, 4–1 I/O mapping
discrete data transfer
nondiscrete data transfer I/O racks, 3–2 indicators, 5–1
,
OK, 2–10
status display installing the module, 2–6 instructions, CIO, 4–3
, 2–10
K
, 1–2
, 4–2
, 4–3
D
data transfer
discrete I/O, 4–2
keying bands, 2–2
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IndexI–2
L
low
voltage directive, 2–1
M
module installation, 2–6 module location, 2–2 module switches, setting, 2–4
N
network access port, 1–2 network address, switches, 2–4 network addresses, acceptable, 2–4 network connections, using taps, 2–7 network number nondiscrete I/O communication, example,
4–5
nondiscrete I/O data transfers, factors to
consider
nondiscrete mapping, 4–4
, assigning, 2–4
, 4–6
P
position, keying bands, 2–3 power requirements, 2–2 powerup sequence, 2–10 programming terminal, connecting to
network, 2–9
R
racks, I/O, 3–2 redundant system, example of, 1–3 reset pushbutton, 1–2
S
status display indicator status indicators, 5–3 switch assemblies, 1–4 switches, network address, 2–4
, 2–10
T
O
OK indicator
taps, connecting to network, 2–7 troubleshooting indicators, 5–1
, 2–10, 5–2
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