Rockwell Automation Allen-Bradley 1770-KFC15 User manual

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ControlNet
Communication
Interface Module
1770-KFC15
User Manual
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Important User Information
Solid state equipment has operational characteristics differing from those of electromechanical equipment.
Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (Publication
SGI-1.1 available from your local Rockwell Automation sales office or online at
http://www.ab.com/manuals/gi) describes some important differences between solid state equipment and
hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of
uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves
that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many
variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot
assume responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc. is prohibited.
Throughout this manual we use notes to make you aware of safety considerations.
WARNING Identifies information about practices or circumstances that can cause an explosion in a
hazardous environment, which may lead to personal injury or death, property damage,
or economic loss.
IMPORTANT Identifies information that is critical for successful application and understanding of the
product.
ATTENTION Identifies information about practices or circumstances that can lead to personal injury
or death, property damage, or economic loss. Attentions help you:
•identify a hazard
•avoid a hazard
•recognize the consequence
SHOCK HAZARD Labels may be located on or inside the equipment to alert people that dangerous
voltage may be present.
BURN HAZARD Labels may be located on or inside the equipment to alert people that surfaces may be
dangerous temperatures.
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Publication 1770-UM520C-EN-P - July 2004
Preface
The 1770-KFC15 communication interface module provides a communication link between
a ControlNet cable system and devices with a serial or parallel port, such as programming
terminals, portable computers, and other serial/parallel devices.
Purpose of the Manual
Throughout this manual we refer to the 1770-KFC15 communication interface module as
simply ‘the module’.
Use this manual to:
•install and configure the module
•understand how the module communicates on the network (procedures and
protocols)
•troubleshoot for problems
Related Publications
These publications contain information related to the 1770-KFC15 Communication Interface
module:
Publication Title Publication Number
ControlNet Cable System Planning and Installation Manual CNET-IN002
ControlNet Cable System Component List AG-PA002
DF1 Protocol and Command Set Reference Manual 1770-RM516
Industrial Automation Wiring and Grounding Guidelines 1770-4.1
PLC-5 Family Programmable Controllers Hardware Installation Manual 1785-6.6.1
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Publication 1770-UM520C-EN-P - July 2004
Related Products
The module creates an interface between the ControlNet cable system and devices with a
serial or parallel port. It has been verified to work with these products:
•Allen-Bradley ControlNet taps
(1786-TPR, 1786-TPS, 1786-TPYR, and 1786-TPYS)
•Allen-Bradley high voltage AC and DC type repeaters
(1786-RPT and 1786- RPTD)
•Allen-Bradley PLC-5 programmable controllers (1785-L20C15, -L40C15, -L60C15,
-L80C15)
•Allen-Bradley computer interface cards (1784-KTC15 and 1784-KTCX15)
•Allen-Bradley 1794 Flex I/O Adapters (1794-ACN15, 1794-ACNR15)
•Allen-Bradley 1771 I/O Adapters (1771-ACN15, 1771-ACNR15)
•Allen-Bradley ControlLogix ControlNet Bridge Module (1756-CNB and
1756-CNBR)
•Rockwell Software’s RSLogix 5, RSView 32, RSLinx, RSNetWorx, RSLogix 500,
RSLogix 5000
•Network Access cable (1786-CP)
Other ControlNet devices and software that comply with the ControlNet Network
specifications can also be used with the module.
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Publication 1770-UM520C-EN-P - July 2004
Terms and Abbreviations
This term: Means:
1747-KFC15 SLC-based module
1756-CNB a 1756-CNB or 1756-CNBR module; a ControlLogix backplane to ControlNet bridge
1770-KFC15 referred to herein as the module
a.k.a. also known as
ACK a DF1 or ControlNet acknowledgement
ControlNet the communication architecture that allows the exchange of messages between
devices that follow the ControlNet specifications
It is a real-time, control-layer network that provides high-speed transport for both
time-critical I/O and messaging data. A ControlNet cable system can be either
single or redundant media.
DF1 DF1 protocol is an Allen-Bradley RS-232 proprietary data-link layer protocol that
combines features of subcategories D1 (data transparency) and F1 (two-way
simultaneous transmission with embedded responses) of ANSI x3.28
specification. The KFC uses DF1 protocol to communicate on the serial port.
DH+ Data Highway Plus network; existing Allen-Bradley peer-to-peer network for
messaging and program upload/download
DH+ PCCC message a PCCC message that originated from a device on a DH+ network
DHRIO Data Highway and Remote I/O
DST the destination address on a DF1 link
full duplex simultaneous send/receive between devices, point-to-point
half duplex data transmission in one direction at a time, usually point-to-multipoint
NAK a DF1 negative acknowledgement
NAP network access port; input/output (RJ-45 style) connector for a programming
terminal to gain full access to the network
network a collection of connected nodes (end devices). The connection paths between any
pair of nodes can include repeaters, routers, bridges and gateways.
network address the network address of a node on the ControlNet cable system. This address must
be in the range of 1 to 99 (decimal) and be unique to that subnet. A subnet can
contain a maximum of 99 nodes.
new KFC Version 4.2 or later of the KFC firmware
node any physical device connecting to the ControlNet cable system that requires a
network address in order to function on the network.
NUT network update time; the rate at which access to the ControlNet network is
granted
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Publication 1770-UM520C-EN-P - July 2004
old KFC Any 1747-KFC15 or 1770-KFC15 firmware released before v4.2, including version
2.2 (a.k.a. version B/B) and older firmware
parallel port input/output port for a device that transmits multiple data and control bits over
wires connected in parallel
PCCC Programmable Controller Communication Commands; an Allen-Bradley
communication protocol used on the Data Highway Plus network
repeater a two-port active physical layer component that reconstructs all traffic it hears on
one network segment side and retransmits it to another network segment side.
Repeaters allow for extensions in network distance, conversion to alternate media
(coaxial cable, fiber, etc.) and altering the topology of the network.
RIO Remote Input/Output; an Allen-Bradley remote input/output link that supports
remote, time-critical, I/O and control communication between a master PLC
controller and its remote I/O and adapter mode slave processors
RS-232C port a serial port that complies with accepted industry standards for serial
communications connections
SRC The source address on a DF1 link
segment trunkline sections connected via taps with terminators at each end, and with no
repeaters
serial port input/output connector for a device that transmits data and control bits
sequentially over a single transmission line. (See RS-232C port.)
standard PCCC message A PCCC message that originated from a device that is not on a DH+ network
subnet network segments connected by repeaters to make up one ControlNet network
tap the connection device between any ControlNet device and the trunkline. A tap is
required for each node and for both sides of each repeater.
terminator a special circuit that prevents signal reflections from occurring at the end of a
cable
trunkline the bus or central part of a cable system
trunkline section a length of trunkline cable between any two taps
This term: Means:
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Publication 1770-UM520C-EN-P - July 2004
ATTENTION
!
Environment and Enclosure
This equipment is intended for use in a Pollution Degree 2 industrial
environment, in overvoltage Category II applications (as defined in IEC
publication 60664-1), at altitudes up to 2000 meters without derating.
This equipment is considered Group 1, Class A industrial equipment
according to IEC/CISPR Publication 11. Without appropriate
precautions, there may be potential difficulties ensuring electromagnetic
compatibility in other environments due to conducted as well as radiated
disturbance.
This equipment is supplied as “enclosed” equipment. It should not
require additional system enclosure when used in locations consistent
with the enclosure type ratings stated in the Specifications section of this
publication. Subsequent sections of this publication may contain
additional information regarding specific enclosure type ratings, beyond
what this product provides, that are required to comply with certain
product safety certifications.
NOTE: See NEMA Standards publication 250 and IEC publication
60529, as applicable, for explanations of the degrees of protection
provided by different types of enclosure. Also, see the appropriate
sections in this publication, as well as the Allen-Bradley publication
1770-4.1 (“Industrial Automation Wiring and Grounding Guidelines”),
for additional installation requirements pertaining to this equipment.
!
WARNING
Preventing Electrostatic Discharge
This equipment is sensitive to electrostatic discharge, which can cause
internal damage and affect normal operation. Follow these guidelines
when you handle this equipment:
•Touch a grounded object to discharge potential static.
•Wear an approved grounding wrist strap.
•Do not touch connectors or pins on component boards.
•Do not touch circuit components inside the equipment.
•If available, use a static-safe workstation.
•When not in use, store the equipment in appropriate static-safe
packaging.
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Publication 1770-UM520C-EN-P - July 2004
Notes:
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Publication 1770-UM520C-EN-P - July 2004
Table of Contents
Chapter 1
ControlNet System Overview
Overview of ControlNet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Understanding the ControlNet Architecture . . . . . . . . . . . . . . . . . . . . 1-2
Planning the Host Cable System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Chapter 2
Introducing the Module
Overview of the 1770-KFC15 Module . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Chapter 3
Installing the Module
Electrostatic Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Overview of the Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Connecting to a Host through the RS-232C Port . . . . . . . . . . . . . . . . 3-2
RS- 232C Baud Rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
RS-232C Activity Indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Connecting to a Host through the Parallel Port. . . . . . . . . . . . . . . . . . . . . 3-4
Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Parallel Port Activity Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Connecting a Device to the Network Access Port. . . . . . . . . . . . . . . . . . . 3-4
Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Connecting to the AC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Connecting to the ControlNet Cable System . . . . . . . . . . . . . . . . . . . . . . . 3-6
Attaching the Module to a Wall or Mounting Bracket. . . . . . . . . . . . . . . . 3-7
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2Table of Contents
Publication 1770-UM520C-EN-P - July 2004
Chapter 4
Configuring the Module
Overview of Configuration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Pushbuttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Configuring the Module by Using Pushbuttons . . . . . . . . . . . . . . . . . 4-3
Verifying the Communication Parameters. . . . . . . . . . . . . . . . . . . . . 4-13
1770-KFC15 Diagnostic Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Reading 1770-KFC15 Counters With a Diagnostic Command. . . . . . . . 4-14
Chapter 5
Understanding the Extra-hop Feature
Method 1: No Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Method 2: Configure a Path Using the Pushbuttons
and 7-segment Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Path Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Port Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Address/Slot Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5
Chapter 6
Communicating with the Module
DF1 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Serial Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Parallel Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Embedded Responses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Message Reply Time-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Default DF1 Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
DF1 SRC and DST Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
RSLinx DF1 Driver Anomaly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Auto-recovery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Message Buffers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Chapter 7
Troubleshooting the Module
Interpreting the Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
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Table of Contents 3
Publication 1770-UM520C-EN-P - July 2004
Appendix A
Product Specifications
Appendix B
Cabling and Pinouts
Cabling and Pinouts for RS-232C Connection. . . . . . . . . . . . . . . . . . . . . B-1
Cabling and Pinouts for Parallel Port Connection . . . . . . . . . . . . . . B-6
Appendix C
DF1 Diagnostic Command Support
Diagnostic Loop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Diagnostic Read Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Diagnostic Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
Diagnostic Counter Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6
1747-KFC15 Meters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6
Appendix D
Writing a Parallel Communication Driver
DF1 Parallel Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
Data Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-4
Index
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4Table of Contents
Publication 1770-UM520C-EN-P - July 2004
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Publication 1770-UM520C-EN-P - July 2004
Chapter 1
ControlNet System Overview
This chapter briefly describes the network architecture. For detailed information, refer to the
ControlNet Cable System Planning and Installation Manual, CNET-IN002.
Overview of ControlNet
ControlNet combines the capabilities of Data Highway Plus and Remote I/O in a single local
area network (LAN). It provides time-critical communication capabilities for real-time
control, and messaging services for peer-to-peer communication.
Several devices can be connected to the ControlNet cable system including personal
computers, programmable logic controllers, modems, variable speed drivers, operator
interfaces, and other devices with direct ControlNet cable system connections. To connect
directly, devices must be able to handle ControlNet communication protocol. The
PLC-5/40C15 is such a device. Some equipment, however, requires an intermediate device to
act as an interface between it and the network. The 1770-KFC15 module acts as this
interface. Refer to Chapter 2 for more information on the 1770-KFC15 module.
Physical Characteristics
The physical network media for ControlNet is coaxial cable with redundant media
connections as an option. The allowable length of a cable segment in the network depends on
the number of nodes in the segment. A single subnet can accommodate several segments by
using repeaters.
Communication Protocol
The most important function of the ControlNet network is to transport time-critical control
information. Other information is also transported but is not allowed to interfere with
time-critical messages. This is done through a communication protocol that determines
access to the ControlNet network using a time-slice access algorithm. Access to the network
occurs at a user-configurable period called the network update time (NUT).
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1-2 ControlNet System Overview
Publication 1770-UM520C-EN-P - July 2004
The NUT is divided into three parts:
Scheduled—every node is guaranteed one opportunity to transmit
Unscheduled—remaining time is divided among all nodes on a round-robin basis. This
rotation of access repeats until the time allotted to the unscheduled portion is used up. The
amount of time available for the unscheduled portion is determined by the traffic load of the
scheduled portion.
Maintenance—the moderator node (the one with the lowest address) transmits information
to keep the other nodes synchronized in time
The part of the interval in which any given data will be sent depends on its priority,
of which there are two levels:
Scheduled Data—time-critical information that must be sent at a fixed and repetitive rate is
sent exclusively in the scheduled portion of the NUT.
Unscheduled Data—information that does not have strict time constraints. It is sent only if
no data is waiting to be sent at a higher priority.
The 1770-KFC15 module supports non-time-critical messaging and programming
data, and sends only unscheduled data.
Understanding the ControlNet Architecture
The ControlNet cable system provides the flexibility to design a communication
network for your application. To take advantage of this flexibility, you should
spend enough time planning how to install your cable system before assembling
any of the hardware. Consult the ControlNet Cable System Planning and Installation
Manual, CNET-IN002, for a full description of the cable system and detailed installation
instructions.
boundary moves depending
on scheduled traffic load
Start
• reserved for
scheduled traffic
• each device transmits
only once • unscheduled traffic
• reserved for
network maintenance
31446-M
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ControlNet System Overview 1-3
Publication 1770-UM520C-EN-P - July 2004
Planning the Host Cable System
A serial or parallel host (computer, controller, or other device) can connect to the
module through either the parallel or RS-232C serial port. Both ports on the module
cannot be active at the same time so you must decide which port is the most
appropriate for your application. This decision determines the cabling and
hardware requirements for your system.
Communication between either a parallel or serial host and the module is carried
out using Allen-Bradley’s proprietary DF1 protocol. DF1 is a full- or half-duplex
protocol that carries messages intact over a link. The protocol delimits messages,
detects and signals errors, retries after errors, and controls message flow. In a
typical network, as discussed in this manual, the host is the master station and the
module is the slave. For a complete description of the DF1 protocol, refer to the
DF1 Protocol and Command Set Reference Manual, 1770-RM516.
Planning for an RS-232C Serial Port
Serial port communication can take place in either full- or half-duplex mode. If a
single module per serial host is used, either half-duplex or full-duplex
communication can take place. Since it is faster and easier to configure, full-duplex
is always preferred over half duplex.
IMPORTANT Firmware V4.2 and later do not support the parallel port.
1770-KFC15
RS-232C Link
ControlNet
ControlNet Devices
Host
31348-M
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1-4 ControlNet System Overview
Publication 1770-UM520C-EN-P - July 2004
If more than one module is connected to a host, only half-duplex communication can occur
and half-duplex modems must be used between the module and the host. See Figure 1.1 on
page 1-4. Determine how many modules you will need before planning the layout of the host
system because cable length and baud rate are affected as well. See Appendix B for details.
Figure 1.1 Connecting Multiple Modules to One Host By Using Modems
1770-KFC15
Modem Modem
Modem
ControlNet
ControlNet ControlNet
ControlNet Devices
Host
RS-232C Link
1770-KFC15
ControlNet
ControlNet Devices
31349-M
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ControlNet System Overview 1-5
Publication 1770-UM520C-EN-P - July 2004
Planning for a Parallel Port (Not supported in V4.2 and later)
The parallel port interface, not supported in V4.2 or later, consists of eight, bidirectional data
lines and nine handshaking lines. Consider the following requirements when planning for a
parallel port connection.
•Data transfers occur in half-duplex mode between the parallel host and the
module.
•Data transfer mode is configured using pushbuttons on the module and can
be bytes (8 bits) or nibbles (4 bits).
•When connection is via the parallel port you can have only one module per
host.
•The maximum recommended cable length between the module and the
parallel host is 3 m (10 ft).
•The cable between the module and the parallel host must be shielded.
For detailed cabling and pinout information see Appendix B, Cabling and Pinouts. For a
discussion of data transfer modes and other communication issues, see Chapter 5,
Communicating with the Module and Appendix D, Writing a Parallel Communication Driver.
1770-KFC15
Parallel Link
ControlNet
ControlNet Devices
Host
31347-M
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1-6 ControlNet System Overview
Publication 1770-UM520C-EN-P - July 2004
Notes:
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Publication 1770-UM520C-EN-P - July 2004
Chapter 2
Introducing the Module
Overview of the 1770-KFC15 Module
The module enables you to connect RS-232 devices directly to ControlNet. Device types
requiring connection to the ControlNet cable system are varied, including multi-vendor
automation equipment, personal computers, mini-computers, and modems.
Figure 2.1 Top View
Power Connector
115/230 VAC
Line Selector Switch
Fuse
ControlNet Channel B
BNC Connector
ControlNet Channel A
BNC Connector
RS-232C Port
Parallel Port
Network
Access Port Status LEDs
31352-M
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