Network Overviews

Network Overviews
NetworkPAGE
EthernetJ3
PROFIBUS®J9
FOUNDATION™ fieldbus
J13
CANopenJ19
AS-interface®J23
Appendix: Network Overview
DeviceNet™J29
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J2
Ethernet
At-A-Glance
What is it?
Industrial Ethernet is
the result of applying
traditional Ethernet
standards for data
communication to
industrial applications
What are its basic
components?
I/O slaves (Servers), masters
(Clients), communication
cable and power supply
and cable
Where is it used?
Industrial automation,
mobile equipment,
transportation, medical,
military and PLC to PLC
communication
Who is responsible for it?
Ethernet physical layer
is standardized in IEEE
802.3. Application layers
like EtherNet/IP, PROFINET
and Modbus TCP are
open standards with
independent governing
bodies. Overview
Ethernet is the most commonly used computer networking technology for local area
networks (LANs) and is standardized in IEEE 802.3. As Ethernet continues to find its way into
other applications, it is rapidly becoming the network of choice for higher-level industrial
control applications. Industrial Ethernet is the result of applying traditional Ethernet
standards for data communication to industrial applications. Industrial Ethernet is primarily
used to connect PLCs, computers, HMI displays and other high-level components. The
term “Ethernet” refers to the lower-level communication structure. Various versions, or
implementations, of Ethernet are available, such as Ethernet/IP™, PROFINET® and Modbus®TCP. It is important to note that while all of these different specifications use the same
physical communication method and can operate on the same cable simultaneously, they
cannot necessarily communicate with each other. For example, Modbus-TCP devices cannot
communicate with Ethernet/IP devices because the messages and communication protocol
have been defined differently for these systems, even though the physical electrical structure
is the same.
Ethernet I/O modules
Power Supply
Cables
Switch
Basic Parts List
A typical system consists of the following parts:
•
•
•
•
Power Supply
Ethernet I/O modules
Cables
Switch
System Configuration
Ethernet I/O modules act as servers on a network. A client device is needed to retrieve data
from and post data to the server. This is analogous to an office network, where the client PC
on a user’s desk may actively connect with multiple servers to access information in different
areas of the enterprise. TURCK industrial Ethernet stations are designed to be fully compatible
with established Ethernet standards for industrial use.
There are a variety of topologies that can be used for Ethernet configuration such as star
topology, line topology and ring topology:
J3 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
NODE
NODE
NODE
NODE
NODE
STAR TOPOLOGY
NODE
NODE
NODE
NODE
DEVICE-LEVEL RING (DLR) TOPOLOGY
LINE TOPOLOGY
Addressing
Industrial Ethernet stations use the IP addressing scheme. An address defined by this scheme consists of
four byte values usually displayed in decimal form, for example, 192.168.1.254. Various classifications of
networks require different portions of this address to be constant for all devices on the network (referred to
as a “subnet”). This means that the number of stations allowed on a particular network varies depending on
what class of subnet is being used. If the first three bytes of the IP address are constant (which is common),
then the remaining byte may be addressed between 2 and 254, resulting in 253 possible addresses.
Maximum Ratings
Jacket
Braided Shield
Foil Shield
Brown
White/Brown
Blue
White/Blue
Orange
White/Orange
Green
White/Green
Jacket
Inner Jacket
Aluminum Armor
Brown
White/Brown
Blue
White/Blue
Orange
White/Orange
Green
White/Green
Cordsets
TURCK offers a complete line of molded Ethernet cordsets to facilitate network installation, resulting in
faster start-up and fewer wiring errors. Cables are available with stranded or solid-core conductors, and
with or without shielding. Most TURCK Ethernet equipment uses the 4 or 8-pin (M12) eurofast® connector
specifications. These connectors provide a tough, rugged seal and are IP67-rated. In some cases, (mainly in
the control cabinet) a traditional RJ45 Ethernet connector needs to be used. TURCK provides RJ45 cordsets,
as well as a variety of devices made to convert between RJ45 and eurofast connectors. TURCK cordsets for
the Ethernet system are available in standard lengths, in addition to custom lengths through the company’s
sales representatives.
eurofast connector
RJ45 connector
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J4
Appendix: Network Overview
Ethernet allows different maximum cable lengths depending on the type of cable being used. Generally, an
Ethernet segment may be as long as 100 m, where 90 m must be solid core cable and the remaining 10 m
can be stranded patch cords.
Ethernet
Diagnostics
Industrial Ethernet stations support diagnostics information, which is based on their
complexity and functionality. The common ground for all devices is that they provide visual
diagnostic information using either a pair of status LEDs called MOD and NET LEDs or a
single combined MOD/NET LED. Industrial Ethernet stations may also include an embedded
webserver that can be accessed by a web browser, such as Internet Explorer. This embedded
webserver can be accessed to provide diagnostic information anywhere in the world. TURCK discrete IO modules provide diagnostic data as a part of input data map. Standard
stations support group diagnostics, where a single alarm bit is set if any IO is faulted. Deluxe
station support individual IO diagnostic data, including open wire and short wire alarm bits.
EtherNet/IP
Overview
EtherNet/IP is a communication protocol supported by the ODVA and is designed for use
in industrial automation and process control applications. It takes the Common Industrial
Protocol (CIP) and implements it onto the foundation of Ethernet. CIP envelops a wideranging suite of messages and services for a variety of applications, including safety, control,
configuration and information. Ethernet/IP provides users with tools to deploy standard
Ethernet technology for industrial applications.
Supported Features:
• ACD – Address Conflict Detection – This supported feature will detect if another
device on the network has the same IP address. If a conflict is detected, the device
will go into a recoverable fault state and set the status LEDs to indicate a fault • DLR – Device Level Ring – Device Level Ring (DLR) is a fault tolerant network allowing
continuous system operation when a single fault occurs in the end node, its network
interface or cable system. The adoption of an integrated Ethernet switch in the
multiprotocol products allows support for DLR across all product families
• Quick Connect
Addressing Options:
•
•
•
•
•
Rotary Mode – IP address is preconfigured
Programmable
Webserver
Boot-P
DHCP
Configuration Options:
• Generic Ethernet Device – Standard setup of Ethernet products
in Logix 5000 that are not Rockwell made products
• EDS support – Contrologix v20 and Omron
• CIP Bridge – Allen Bradley PLCs only – This features allows total setup and configuration
of supported multiprotocol products within the Rockwell software (Logix 5000)
• IO Assistant –This free software is a FDT/DTM based technology for engineering,
configuring, commissioning and diagnosing multiprotocol products
J5 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
PROFINET
Overview
PROFINET is a communication protocol that was developed by Siemens and the PROFIBUS User
Organization (PNO) based on the open Ethernet standard. PROFINET features a modular design
structure allowing users to select the cascading functions including standard TCP/IP for applications
not requiring real time performance, Real Time (RT) for applications requiring the transfer of critical
information and Isochronous Real Time (IRT) for applications using functionality like motion control.
Supported Features:
•
•
•
•
•
Fast start-up
GSDML file support
Topology detection support
Automatic address assignment – LLDP
GSDML function configuration
Addressing Options:
•
•
•
•
•
Rotary mode
PROFINET name assignment
Programmable
DNS-PGM – (x600)
Webserver
Configuration Options:
• The PROFINET cordset line offers both M12 Ethernet D-coded and RJ45 connector options, allowing
users the option to mix-and-match any connector combination to meet unique application needs
Appendix: Network Overview
MODBUS TCP/IP
Overview
Modbus TCP/IP is the Modbus RTU protocol with a TCP interface running on Ethernet. Modbus
was originally designed by Modicon (Schneider Electric) and is now managed by the Modbus-IDA
User Organization. TCP/IP refers to Transmission Control Protocol and Internet Protocol, which
provides the transmission channel for Modbus TCP/IP messaging. Modbus TCP/IP is used often in
the industrial environment due to its ease of deployment and maintenance, and because it was
developed specifically for industrial applications.
Modbus TCP/IP can be used with star, tree or line network topology and can be implemented with
Ethernet technology that has been adapted for use in the industrial environment.
Supported Features:
•
•
•
•
Bit register and function codes
6 parallel Modbus connections
PACTWARE FDT/DTM configuration and mapping
Embedded webserver for diagnostics and configuration
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J6
Ethernet
Addressing Options:
•
•
•
•
•
Rotary mode – IP address is preconfigured
Programmable
Webserver
Boot-P
DHCP
Configuration Options:
• Controllers can be setup to communicate on standard Modbus networks
using either of two transmission modes: ASCII or RTU
• Users select the desired mode, along with the serial port communication parameters
(baud rate, parity mode, etc.), during configuration of each controller
TURCK Multiprotocol
Overview
TURCK provides a complete line of industrial Ethernet products, including on-machine, incabinet, block, and modular I/O. The most recent innovation is the Multiprotocol Industrial
Ethernet concept. TURCK’s innovative approach to industrial Ethernet I/O makes moving from
another protocol, or simply implementing a fieldbus for the first time, plug-in simple. TURCK’s
Multiprotocol products are self- configuring and offer a seamless transition to Ethernet,
whatever Ethernet that may be.
1 Device = 3 protocols
•
•
•
•
•
•
J7 B3027
Ethernet/IP, PROFINET and Modbus TCP/IP
Gateway (slave) recognizes the master upon power-up and self-configures for master protocol
Supports ODVA quick-connect and Device Level Ring (DLR)
PROFINET options include: PROFINET RT, and PROFINET Fast Start-up (FSU)
PROFINET IRT available in standard product configuration
Embedded web server for device configuration and diagnostics
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Appendix: Network Overview
Notes:
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J8
PROFIBUS®
At-A-Glance
What is it?
PROFIBUS® is an industrial
network protocol that
connects field I/O devices
in order to eliminate
hard wiring.
What are its basic
components?
Master, slaves,
communication cable,
power supply and power
cable (PROFIBUS-DP)
Where is it used?
Machine control
applications, process and
hazardous area situations
Who is responsible for it?
PROFIBUS is maintained by
the international governing
body: PI (PROFIBUS &
PROFINET INTERNATIONAL)
Overview
PROFIBUS® is an industrial network protocol that connects field I/O devices in order
to eliminate hard wiring. The network connection increases device-level diagnostic
capabilities, while also providing high-speed communication between devices.
PROFIBUS-DP
PROFIBUS-DP is the version of PROFIBUS that is generally used for factory automation and
machine control solutions. It is based on the RS-485 serial data transfer standard. In most
cases, the termination and physical media rules for PROFIBUS-DP are the same as those
required for RS-485 communication. A PROFIBUS-DP network supports up to 126 nodes and
virtually an unlimited variety of I/O. The bus uses a trunkline/dropline topology. Power and
communication are provided via separate cables, allowing easy segmentation of the power
structure to avoid overloading.
PROFIBUS-DP is capable of running at data rates as high as 12 Mbaud. When used at high
data rates, the cable drop length from the trunk to a node is severely limited. For example,
when used at 12 Mbaud, nodes must be directly connected to the trunk, with no drop
length allowed.
Although PROFIBUS-DP is well suited to machine control applications, it is also useful for
process and hazardous area situations (in fact the name PROFIBUS is an abbreviation of
Process Field BUS). TURCK’s excom system allows connection from a PROFIBUS-DP network
directly to I/O devices in classified areas, resulting in a huge potential savings on barriers
and wiring.
PROFIBUS-PA
PROFIBUS-PA is another version of PROFIBUS, designed for hazardous area usage though it may
also be used in non-hazardous areas due to a variety of reasons such as topology and device
parameterizations. It operates as an extension from the PROFIBUS-DP system. Using the same
media specification as FOUNDATION™ fieldbus (IEC 61158-2), it allows network communication
directly in hazardous areas. All devices on a PROFIBUS-PA system are controlled by the
PROFIBUS-DP master. The conversion from DP to PA is accomplished by a linking or gateway
device, which converts from the high speed RS-485 DP communication to the lower speed
(31.25 kbps) IEC 61158-2 communication required for PROFIBUS-PA. The logical communication
structure is identical between the systems; only the physical media is different.
A typical PROFIBUS-PA network, connected to a higher-level PROFIBUS-DP system
J9 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Power Supply
Master
Slave
Power
Cable
Communication
Cable
Slave
Slave
Slave
Slave
PROFIBUS® Structure
Appendix: Network Overview
A typical PROFIBUS system consists of the following parts:
• Master
• Slaves
• Communication cable
• Power supply
• Power cable (PROFIBUS-DP)
PROFIBUS stations require a network master (also called a scanner) to interface the stations to the
host controller. TURCK PROFIBUS-DP stations are designed to be fully compatible with PROFIBUS-DP
equipment from other manufacturers.
Communication Rate/Cycle Time
PROFIBUS-DP specifications define multiple transmission speeds ranging from 9.6 kbaud to 12
Mbaud. All nodes on a network must communicate at the same rate. The complete cycle time of a
PROFIBUS-DP system is affected by several factors:
• Number of nodes being scanned
• Amount of data produced and consumed by the nodes
• Network communication rate
• Cycle time of the control program
• Number of masters present
All of these factors must be considered when calculating the cycle time of a particular network.
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J10
PROFIBUS®
Maximum Ratings
The PROFIBUS-DP bus uses a trunkline/dropline topology. The trunk is the main
communication cable and requires the appropriate RS-485 active termination at both ends
of the network. Active termination requires a bias voltage, typically supplied by the network
nodes, to function. Turck offers these terminating resistors as a plug-in eurofast(R) unit or
built into their D9 connectors. If terminating at the end of the cable in desired, Turck offers a
special Terminating resistor in an IP67 form factor that can be supplied externally with this bias
voltage.. The length of the trunk depends on the communication rate. Drops or branches off
the trunk are allowed, but are greatly limited as the communication rate increases. The table
shows the maximum ratings for a PROFIBUS-DP trunk at different communication rates.
Communications Rate
Max. Segment Length
9.6 kbps
1200 m
19.2 kbps
1200 m
93.75 kbps
1200 m
187.5 kbps
1000 m
500 kbps
400 m
1.5 Mbps
200 m
12 Mbps
100 m
PROFIBUS-PA has the same physical limitations as FOUNDATION fieldbus, identified in this table
Cable
Trunk
1900 meters
Number of Devices
Maximum Spur Length
25-32
0 m (0 ft.)
19-24
30 m (98 ft.)
15-18
60 m (197 ft.)
15-18
60 m (197 ft.)
13-14
90 m (295 ft.)
2-12
120 m (394 ft.)
Diagnostics
TURCK network stations provide increased diagnostics over using traditional hard-wired I/O
systems. TURCK stations also serve as a buffer between I/O devices and the PROFIBUS-DP
network by detecting short circuits without disrupting communication. The PROFIBUSDP system includes a provision for special diagnostic data messages. These messages are
triggered when a fault occurs at the station (for example a short circuit on a sensor). When
the master asks the station for data, the station responds and includes a flag to indicate that
diagnostic data is present. The master then asks for the diagnostic data, which is mapped to a
special location in the controller’s memory.
Addressing
The valid range of PROFIBUS node addresses is 0 to 125. TURCK station’s addresses are usually
set via rotary dials or switches on the node. Changes to the address settings take effect
when the station power is cycled or when the station receives a software reset. Care must be
taken to prevent the same address from being assigned to more than one node in a system.
Bihl+Wiedemann PROFIBUS-DP to AS-i gateways addresses are set in software using the onunit display.
J11 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Cordsets
TURCK offers a complete line of molded PROFIBUS-DP and PROFIBUS-PA cordsets to facilitate network installation, resulting in
a faster start-up and fewer wiring errors. The bus and drop cables are specially designed foil-shielded, high-flex cables with very
low inductance and capacitance to minimize propagation delay time. PROFIBUS-DP cables consist of a shielded and twisted data
pair with a bare drain wire. PROFIBUS-PA cables feature a shielded, twisted pair for data and bus power and a drain wire.
In most cases, connections of the bus cable to the stations are made using 5-pin reverse-key eurofast (M12) connectors for
PROFIBUS-DP. A variety of stations are also available that support D9 type connections. Power for most stations is provided
through one or two 5-pin minifast® (7/8-16UN) connectors.
PROFIBUS-PA connections are typically made with minifast style connectors, though eurofast connections are available as well.
TURCK cordsets for the PROFIBUS system are available in standard lengths. Please contact your local sales representative to
order custom lengths.
Jacket
Jacket
Inner Jacket
Drain Wire
Drain Wire
Red
Red
Green
Green
Foil Shield
Foil Shield
Braid Shield
Jacket
Aluminum Armor
Jacket
Inner Jacket
Drain Wire
Blue
Data
White
Green/Yellow
Foil Shield
Aluminum Armor
Brown
Blue
Data
Foil Shield
Braid Shield
GSD Files
GSD files contain detailed information about a PROFIBUS-DP device, including I/O data size and the devices configurable
parameters. The information in a GSD file, when used with a PROFIBUS-DP configuration tool, guides a user through the steps
necessary to configure a device.
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J12
Appendix: Network Overview
Drain Wire
FOUNDATION™ Fieldbus
At-A-Glance
What is it?
FOUNDATION fieldbus is an
all-digital, serial, two-way
communications system
for use in applications
using basic and advanced
regulatory control
What are its basic
components?
H1 fieldbus interface card,
fieldbus power supply and
signal conditioner, bulk
power (Vdc) to fieldbus
power supply, terminator
and fieldbus devices
Overview
FOUNDATION™ Fieldbus is an all-digital, serial, two-way communications system for
use in applications using basic and advanced regulatory control. TURCK’s diagnostic
power conditioner (DPC) system stores and monitors information concerning the
components of the control system and field devices. Information on assets that make up
the communication infrastructure (physical layer components) have been simply stored
in an asset management system. With the DPC system, the physical layer components are
continuously monitored providing virtually instantaneous information regarding the quality
and the status of the communication link. This aspect of the system is the key to achieving
the main objective of asset management to minimize maintenance and lower system
operating costs.
Power Supply
Diagnostic Power
Conditioner
Where is it used?
Plant automation, factory
automation, basic and
advanced regulatory
control, discrete control,
process industries, power
plants
Who is responsible for it?
FOUNDATION fieldbus
is an open architecture,
developed and
administered by the
Fieldbus Foundation
Junction Brick
Junction Brick
Junction Brick
Fieldbus Devices
Basic Parts List
A typical system consists of the following parts:
•
•
•
•
Power supply
Diagnostic power conditioner
Junction bricks
Fieldbus devices
System Configuration
TURCK has drastically improved on existing physical layer components for use in
FOUNDATION fieldbus applications. The introduction of the DPC system allows the
continuous monitoring of every physical layer component, thus treating the entire physical
layer as an asset and providing the means for it to be managed as such.
J13 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
The DPC System detects errors that may develop over an extended period of time or through
typical failure modes. These changes can occur due to many factors, such as environmental
changes, deterioration of components over time and any other factors that may affect the physical
components of a fieldbus segment. Some of these factors may appear as changes in jitter, hum,
noise levels etc. Alarm strategies may be employed that will warn of typical asset errors, potential
errors or failures. Preventive measures can be implemented well in advance of a potential system
failure. Most common failures can be completely avoided when a preventive maintenance schedule
is implemented.
Appendix: Network Overview
The DPC system also supports the set-up of fieldbus assets by using expedient localization of error
sources, as well as documentation indicating a “good condition” of the segment structure.
The DPC system provides an option for redundant segment supplies. The system, fully loaded, can
accommodate up to 16 fully redundant FOUNDATION fieldbus segments each with an output of 800
mA and 30 VDC. Diagnostic date is available via a DTM, standard FOUNDATION fieldbus function block
libraries or an embedded web server in the HSE field device.
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J14
FOUNDATION™ Fieldbus
Conventional Control System
In a traditional control system, I/O devices in the field are individually wired to a central controller, which is responsible
for all control function processing in the system. This type of system typically consumes a lot of physical space (due to the
amount of wire and the number of I/O cards in the PLC or DCS) and requires a lot of design and labor to install. Additionally,
finding errors in this kind of system can be very time consuming because of the number of possible error points (each
physical wire termination).
Wiring to field
Transmitters
FOUNDATION™ Fieldbus System
In the fieldbus system, the I/O devices are wired to a trunk line (segment) using tee connectors or multi-drop boxes.
Rather than separate pairs of wires carrying data to and from each I/O device, the devices use a common pair of wires for
communication, with each having a turn to “talk” on the network. Instead of performing all the control functions in the
host, the FOUNDATION fieldbus system allows for control blocks to be executed in the field devices themselves, creating
an efficient, high integrity system. One device on the network is responsible for scheduling communication between the
various devices on the system. This is called the Link Active Scheduler (LAS). It can be the host interface or a device in the
field. In most FOUNDATION fieldbus systems at least one backup LAS is defined as well. This allows communication and
control to continue in case the original LAS device fails. Most FOUNDATION fieldbus devices are powered completely from
the network supply. In some cases a device may draw enough current to make it impractical to power it from the network.
In these cases the device is typically powered from a separate (auxiliary) supply.
Another key benefit of using FOUNDATION fieldbus is the ease of adding I/O devices to the system in the future. Because it
is a serial bus where all devices use the same wires for communication, a device can be added by simply splicing it onto the
network. This eliminates the need to pull a new wire pair all the way back to the controller.
FOUNDATION fieldbus devices also typically include a multitude of parameters and diagnostic information, all accessible
over the network. Advanced diagnostics and maintenance scheduling are made much easier with this feature.
Fieldbus
cable
FOUNDATION fieldbus
drop to devices
Transmitters
J15 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Communication Signal
The FOUNDATION fieldbus H1 communication signal is a square waveform superimposed on a DC
carrier. The frequency of the signal is 31.25 Khz. Although it is not a requirement, most devices derive
their supply power from the fieldbus communications cable. The fieldbus specification states that
devices must not be polarity sensitive. However, it is good electrical practice to have all devices
wired with the same polarities. The voltage range allowed for proper operation is 9 to 32 VDC. A
typical fieldbus device will consume 20 mA of current.
Idealized FOUNDATION fieldbus communication signal
Fieldbus Cable Specifications
Type
Cable Descriptions
Conductor Size
Maximum Length
Type A
Shielded, Twisted Pair
18 AWG
1900 m (6232 ft.)
Type B
Shielded, Multi Twisted Pair
22 AWG
1200 m (3936 ft.)
Type C
Unshielded, Multi Twisted Pair
26 AWG
400 m (1312 ft.)
Type D
Shielded, Untwisted Pair
16 AWG
200 m (656 ft.)
Jacket
Braid Shield
Appendix: Network Overview
The specifications for fieldbus H1 physical media are defined by IEC 61158-2 and the ISA-S50.02
Part 2 Physical Layer Standards. The same standard is also listed in the FOUNDATION fieldbus
specifications under 31.25 Kbps Physical Layer Profile FF-816-1.4. There are essentially four types of
cable designations for fieldbus. Type A cable preferred for new installations, because it allows for
the most versatile lengths. The other cable types are for installations where cable already exists from
4-20 mA systems. See table 1.
Foil Shield
Data
Drain Wire
Brown
Blue
Green/Yellow
Device Ground
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J16
FOUNDATION™ Fieldbus
TURCK offers type A cables with both two conductors and three conductors, with the third conductor
available for a centralized ground of devices if needed. TURCK cables meet or exceed the specifications
of ANSI/ISA-SP50.02-1992, the fieldbus standard for use in industrial control systems. The maximum spur
length is determined by the number of devices in the segment.
Cable
Trunk
1900 meters
Number of Devices
Maximum Spur Length
25-32
0 m (0 ft.)
19-24
30 m (98 ft.)
15-18
60 m (197 ft.)
15-18
60 m (197 ft.)
13-14
90 m (295 ft.)
2-12
120 m (394 ft.)
Termination
The FOUNDATION fieldbus communication signal requires that each end of the system be terminated
with a 1 μF capacitor in series with a 100 W resistor across the communication lines. This termination must
be installed at each extreme end of the network segment. Do not use more than two terminators on a
communication segment.
Hazardous Area Usage
FOUNDATION fieldbus networks may be used in hazardous areas as long as required energy limitations
for the specific area are observed. One way to achieve this is to use the “entity” concept, which requires
the network designer to calculate the voltage and current requirements for each device and determine
the system limitations. A simpler option is to use the Fieldbus Intrinsic Safety Concept (FISCO) or Fieldbus
Non-Incendive Concept (FNICO). These concepts define the limitations required for devices on a network
system to be used in a hazardous area (Class I, Div 1 for FISCO and Class I, Div 2 for FNICO). Many newer
FOUNDATION fieldbus devices are rated to meet the requirements of FISCO and/or FNICO. As long as the
devices used and the power supply are marked with FISCO or FNICO they may be connected together in
the appropriate hazardous area. It is important to note that the cabling used must still meet the defined
parameters.
Using Connectorization
Plug-and-play connectorization has been standard practice for many years in industries ranging from
appliance manufacturers to industrial sensors. These industries have found it necessary to compete in
a business climate where speed and consistency of connection is king. Connectorization is the perfect
complement to fieldbus systems. The concepts and goals are identical: reduce installation time, reduce
troubleshooting and easy expansion. The fieldbus system minimizes point-to-point wiring that can be
time-consuming and difficult to troubleshoot. Connectorization takes that one step further, almost
completely eliminating troubleshooting. Plants that have implemented plug-and play connectorization
claim up to a 75 percent reduction in start-up. This directly translates into real cost savings.
Cost Savings
The initial capital cost is the major factor in selecting a method of connecting devices. These costs include
material and installation. The cost of incorporating plug-and-play connectivity will be 10 to 60 percent
less. Actual savings will depend on the size and complexity of the installation. Other cost saving factors
include reduced design cost, reduced maintenance cost, reduced troubleshooting cost and reduced
expansion costs. Some of these cost savings are difficult to determine until the condition exists. However,
these costs can quickly change from potential cost savings to real cost savings when the installation
begins.
J17 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Design Cost Savings
Most projects begin with a rough definition to develop the capital scope and then progress to
detailed development. Development of the capital scope is often expressed in terms of segments,
transmitters and tanks. The cabling can be expressed in the same way. Each transmitter requires one
device gland and one cordset. Each tank requires one tee, one drop cordset and typically one brick.
The home run or trunk cable can run in either conduit or cable tray, so either a field wireable tee or a
conduit adapter is required at each tank. A terminating resistor is needed at the beginning and end
of the network. A simple estimated bill of materials can be developed as follows:
For: 4 segments, 50 transmitters, 10 tank process
Description
Product Number
Quantity
Device Glands
RSFV 49-0.3M/14.5
50
Cordsets
RSV RKV 490-6M
60 (50 Transmitters + 10 Drops)
Multiport Bricks
JBBS-49SC-M613
10
Field Wireable Tee
SPTT1-A49
10
Terminating Resistor
RSV-49-TR
8
Bulk Cable
CABLE, 490-300M
1
Often for estimating purposes, an average length of cordset and segment length is assumed. In this
example, 6 m (20 ft.) cordsets and four 75 m (250 ft.) segments are estimated. The cost and time
of coping with continuous changes during the engineering design phase can be very expensive.
However, with this model the changes are limited to the length of the cordset and spool of bulk
cable. Design changes can even wait until all the transmitters are mounted. Simply taking physical
measurements is as valid as any other design method.
Material Costs
field wiring
NEMA 4X box (Hoffman® or equivalent
Cage clamp termination block
plug and play
$ 275
Junction brick (JBBS-49SC-M613)
$ 486
450
Installation of blocks in box
50
Bulk cable (6 meters)
12
Cordsets (six RSV RKV 490-1M = $44.00)
264
48
Device gland
(RSFV 49-0.3M/14.5 = $30.30)
181
Device gland (
1/2 NPT fitting = $8.00)
TOTAL
Appendix: Network Overview
The cost of cordsets and bricks will be slightly lower than the cost of termination in enclosures. The
plug-and-play junction bricks are IP67 rated (equivalent NEMA 4X). This means they can be mounted
indoors or outdoors without any secondary enclosures. A NEMA 4X enclosure can cost anywhere
from $75 for steel to $275 for stainless steel. The cost can increase by another $40 to $60 for the
design and installation time required to put mounting holes in the enclosure and installing cable
glands. A cage clamp style termination block costs $200 to $450 depending on whether is has short
circuit protection. The plug-and-play bricks cost only $322 and $486 depending on whether they
have short circuit protection. A set of six cordsets costs only $264 (RSV RKV 490-1M)*. The material
cost comparison for a stainless steel installation is as follows:
$ 835
TOTAL
$ 931
A junction brick system that is completely encapsulated for use indoors or outdoors is equivalent to
or approximately 10 percent more expensive than a termination block mounted in an enclosure.
The real savings are in the speed and ease of installation.
* Costs given are examples only, and are subject to change.
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J18
CANopen
At-A-Glance
What is it?
CANopen is a
communication protocol
and device profile
specification for embedded
systems in automation
applications
What are its basic
components?
Controller, power supply,
CAN cable, CANopen I/O
nodes and terminating
resistors
Where is it used?
Industrial automation,
mobile equipment,
transportation, medical,
military and building
automation
Who is responsible for it?
CAN in Automation
(CiA), the international
users’ and manufacturers’
organization, develops
and supports CAN-based
higher-layer protocols
Overview
CANopen is a higher layer open protocol implemented using the CAN (controller area
network) lower level protocol. The CANopen standards, as defined by the CiA (CAN in
Automation) organization, are split between communication profiles and device profiles.
Communication profiles define the various communication mechanisms and objects used
within the CANopen environment. Device profiles provide specific requirements for similar
device types from different manufacturers to ensure that the implementation of those
devices remains consistent.
Components
CANopen utilizes an object based structure. Each node stores I/O and parameter data
within index locations mapped in the device’s OD (object dictionary), as defined by the
device profile. These objects can be accessed via SDO (Service Data Object) or PDO (Process
Data Object) messages.
Service Data Object (SDO)
SDO messages are primarily used for node configuration and parameterization. Point-topoint SDO messaging allows access to a single entry in the object dictionary and consists of
both a request and response message.
Process Data Object (PDO)
PDO messages are used to transmit process I/O data. These non-confirmed messages can be
configured to transmit multiple data objects, up to 8 bytes, within a single message.
Communication modes available for PDO transmission include:
• Event Controlled: The PDO transmission is triggered by COS (Change of State) of data
contained within the objects mapped into the PDO
• Time Driven: The PDO is generated on a fixed time interval
• Request Controlled: Polled PDO transmission occurs in response to a remote request
frame from a master or another node
• Cyclic Synchronized: Nodes apply output data received and store input data (to be
sent as the bus becomes available) upon transmission of a SYNC message. Often used
in motion applications, this mode allows process data to be triggered and/or collected
from multiple nodes at a single moment in time
The NMT (Network Management) master uses NMT messages to control the operational
state of each node (e.g. pre-operational, operational, reset). Heartbeat and node guarding
are also functions of NMT messaging.
Data rates available for CANopen include 1Mbit, 800kbps, 500kbps, 250kbps, 125kbps,
50kbps, 20kbps and 10kbps. A maximum of 127 devices are possible on a typical CANopen
network (11-bit CAN message identifiers).
J19 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Power Supply
Controller
I/O Node
Power Cable
Network Cable
I/O Node
I/O Node
Basic Parts List:
Appendix: Network Overview
A typical system consists of the following basic components:
• Controller
• Power Supply
• CAN Cable
• CANopen I/O Nodes
• Terminating Resistors
Physical Requirements and Maximums
CANopen is implemented based off the trunk and drop topology. It is recommended that a cable be
used with 120Ω characteristic impedance. Both ends of the trunk are to be properly terminated with
a resistance representing the characteristic impedance of the transmission line (120Ω).
bit rate
bus length
max. drop length
accumulated drop length
1 Mbit/s
25 m
1.5 m
7.5 m
800 kbit/s
50 m
2.5 m
12.5 m
500 kbit/s
100 m
5.5 m
27.5 m
250 kbit/s
250 m
11 m
55 m
125 kbit/s
500 m
22 m
110 m
50 kbit/s
1000 m
55 m
275 m
20 kbit/s
2500 m
137.5 m
687.5 m
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J20
CANopen
Communication Signal
CANopen signals conform to the Controller Area Network (CAN) standard as defined by
ISO 11898. The signal type is a differential square wave, allowing for common mode noise
rejection.
Oscilloscope capture of the differential CAN signal.
The CAN high and low components are shown with
the resulting difference below.
J21 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Cordsets
Although the CANopen specification requires cables to only contain CAN High, CAN Low and a CAN
ground conductor, it is also acceptable to include a shield, V+ and V- (device power). The addition
of device power bundled within the CAN cable becomes particularly useful within industrial
automation as it saves both the added complexity and cost of running separate cables for CAN and
device power. TURCK CANopen cables include the required signal conductors, as well as the shield
and power pair, with V- also used as the CAN ground.
Jacket
Drain Wire
Blue
White
Black
Red
Data
Power
Foil Shield
Overall Foil Shield
Braid Shield
Appendix: Network Overview
There are many different standardized connectors specified for CANopen (as defined in CiA DR 3031). TURCK offers cordsets with minifast® (7/8-16 UN), eurofast® (M12) and open style options. Cables
are available in different physical sizes for more flexibility (thin cable) or longer trunk lengths (thick
cable). Cordsets are available in standard lengths, but can also be customized through your local
sales representative.
eurofast connector
minifast connector
1.879 [47.7]
REF
.577 [14.7]
REF
1.343 [34.1]
REF
Open Style Connector
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J22
AS-Interface®
At-A-Glance
What is it?
AS-Interface, short for
Actuator Sensor Interface,
is an industrial networking
solution used in PLC, DCS
and PC-based automation
systems that reliably
connects field I/O devices.
What are its basic
components?
One network master (i.e.
gateway), network slaves
(i.e. input and output
modules, one power supply
and wiring infrastructure
Where is it used?
Automation applications,
including conveyor control,
packaging machines,
process control valves,
electrical distribution
systems, airport carousels
and elevators
Overview
Actuator Sensor Interface, commonly referred to as AS-interface or AS-i, is a low-level
industrial I/O communication protocol. It was originally intended to be a simple,
low cost system that would be easy to install and maintain. With that philosophy in
mind, the original developers designed AS-i as a discrete-only two-wire system. It
incorporated features such as automatic station addressing, and power and data were
carried on a single untwisted pair of wires.
As the demand for AS-i grew, so did the demand for more complex devices. The
next major version of AS-i, v2.1, extended the protocol to include seamless transfer
of analog data, transmission of simple diagnostic data and an extended addressing
scheme that effectively doubled the number of stations allowed on the network. The
newest version of AS-i, v3.0, has gone even further, allowing more options for analog
data and much more detailed diagnostic information to be communicated. New AS-i
masters are backwards compatible with nodes from previous versions.
Through the addition of the Safety at Work (SaW) concept to the AS-i specification,
it became one of the first industrial protocols to incorporate safety functionality. It is
possible to combine both standard I/O along with safety communication and control
on a single AS-i network.
AS-interface is usable as a standalone network, or can be used through a gateway as
a subnet to a higher level protocol, such as Ethernet-IP or PROFINET. Gateways are a
node to the higher level protocol and a master to the AS-i system.
ASi Power Supply
ASi Master
I/O Nodes
Who is responsible for it?
AS-International, a member
funded organization
located in Germany
Junctions & Cabling
I/O Node
I/O Node
Typical System Configuration:
-Part List:
A typical system consists of the following parts:
• ASi Power Supply
• ASi Master
• I/O Nodes
• Junctions and Cabling
J23 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Maximum Ratings
The AS-i system uses a freeform topology. AS-i segments up to 100m in total length are possible
without any termination. Through the use of a network terminator that length is extended to 200m;
active tuners alternatively provide up to 300m total length. Only one terminator or tuner may be
used in a segment. Further extension is possible with repeaters. No more than two repeaters may be
used in a single direction from the master.
Communication Signal and Power
AS-i communication uses a Manchester II encoded data signal, which results in a very noise immune
system. The communication media is a simple two-wire untwisted unshielded cable. Both power and
signal are carried over the same pair of conductors. This requires that the DC supply be ‘decoupled’
from the network to maintain signal integrity. Special AS-i power supplies are available which
incorporate the supply and decoupling feature in a single package. Alternatively, a separate AS-i
decoupler unit or a gateway with internal decoupling can be used, allowing the use of a standard 30
VDC supply.
In many cases the AS-i power supply is insufficient for devices with higher current requirements
(particularly output devices). In these cases most manufacturers provide AS-i nodes that draw I/O
current from a separate auxiliary supply. The station electronics are generally still powered from the
AS-i bus.
Addressing
Appendix: Network Overview
The original AS-i system allowed only 4 bits of data to be transferred in each message for a fast and
efficient data transfer system. Nodes could be addressed from 1 to 31, but with the growth of the
network more than 31 stations were often required. Beginning with AS-i v2.1 stations were available
with extended ‘AB’ addressing. This scheme allows the station to be addressed from 1A to 31A or
1B to 31B, allowing 62 total nodes with four discrete inputs and three discrete outputs each. The
extended address range (and the limitation to three outputs) is achieved by using one output bit for
AB selection.
When both A and B addressed nodes are on the same network, they are scanned on alternating
cycles (first all the A nodes are scanned, then all the B nodes). Both AB and single-address nodes can
be on the same network. In this case the single-address (non-AB) nodes are scanned every cycle. It is
important to note that not all v2.1 nodes use the extended addressing scheme.
Analog Data
Although the original AS-i version only allowed discrete data transfer, v2.1 and higher support
seamless analog data transfer. This is accomplished by sending a portion of the analog data on each
of several consecutive network cycles; for example, a 16-bit word of data requires seven network
cycles. Furthermore, AS-i v3.0 allows analog data transfer in a single cycle by consuming more than
one address for the analog node.
AS-interface® Safety at Work
AS-interface offers the ability to implement communication and control of Safety data up to SIL 3/
Cat. 4 levels. Safety devices can be implemented on the same network with standard I/O. A safety
monitor performs the logic for the safety system. These safety monitors are available as an add-on
device or as an integrated feature in many gateways. Programming of the monitor is accomplished
through the ASIMON software. There are a wide variety of safety input and output nodes available to
complete the system.
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J24
AS-Interface®
Diagnostics
AS-i has limited field diagnostic capability, due to the limited amount of data
transferred in each message. With v2.1, a peripheral fault bit can be reported by a
particular node to indicate a fault within the device. This allows the user to easily
determine the location of a fault down to the node level. AS-i v3.0 supports expanded
diagnostic capabilities; allowing asynchronous ‘mailbox’ messaging for more detailed
error information.
Communication Rate/Cycle Time
AS-i communicates at a fixed data rate of 167 kbps. The cycle time of the system is
very predictable because of the simple communication scheme and fixed data rate. A
network with 31 nodes will have a cycle time of less than 5ms. A fully loaded network
with 62 nodes (all A and B addresses used) will have a cycle time of less than 10ms. If
analog nodes are being used, the cycle time of those values will increase as a result of
the analog values being spanned across multiple network cycles.
TURCK & Bihl+Wiedemann
Bihl+Wiedemann is the leading supplier of AS-i master and gateway products. Their
broad product range enables users to select from a wide variety of higher level
fieldbuses or PC/PLC control solutions. TURCK has partnered with Bihl+Wiedemann to
distribute and support their products in North America. Additionally, both Turck and
Bihl+Wiedemann offer a variety of analog and discrete AS-i nodes, PCB devices for
OEMs, and sophisticated accessory products.
Cordsets
TURCK offers a complete line of molded AS-i cordsets to facilitate network installation,
resulting in a faster start-up and fewer wiring errors. AS-i cables consist of a single
untwisted and unshielded wire pair that carries both 30VDC power and the network
data. AS-i was originally designed for use with flat cable using an insulation
displacement connection, but the use of round cables with sealed connectors has
become more common. TURCK provides both cable options.
Jacket
Blue
Brown
Typical AS-i cable
J25 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Appendix: Network Overview
Notes:
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J26
DeviceNet™
At-A-Glance
What is it?
DeviceNet is a low-level
fieldbus network that
eliminates hard wiring
and connects industrial
devices to higher level
programmable controllers
What are its basic
components?
Scanner, DeviceNet cables
and cordsets, I/O nodes,
terminating resistors, power
supply and grounding wire
Where is it used?
Automation, safety devices
and large I/O control
networks
Who is responsible for it?
DeviceNet was originally
developed by American
company Allen-Bradley
(now owned by Rockwell
Automation).
Overview
The DeviceNet™ is a low-level fieldbus network that eliminates hard wiring and connects
industrial devices such as limit switches, photoelectric sensors, valve manifolds, motor
starters, process sensors, bar code readers, variable frequency drives, panel displays
and operator interfaces to higher level programmable controllers. It supports 64 nodes,
attached to the network in trunkline/dropline topology, as shown on Figure 1. The trunk
is the main communication cable that distributes 24VDC power and communication data
to all nodes through the DeviceNet media: cables, cordsets, tees, multiport junction boxes,
power taps and terminating resistors.
The length of the trunk depends on the data rate and type of cable. The common practice
is to use a thick cable for the trunk, whose length is limited to 1,640ft (500 meters). A thin
cable is used for the drops. The length of the drop is limited to 20 ft. (6 meter). It is measured
from the trunk to the farthest node at the drop. The ends of the trunk are terminated using
two 121 Ohm terminating resistors. The network must be grounded at a single location
only. Multiple power supply units are allowed but only one of them is grounded. The best
location to ground the DeviceNet is in the middle of the network.
TR
TR
#x
#x
#2
SW
#1
Switch
TR
Terminating resistor
#x
Node
Trunk
#x
#x
#x
#x
#x
#x
Drop
The DeviceNet is a connection-based network. There are two types of connections, the
Explicit connections (point-to point or peer-to-peer) and IO connections. The Explicit
messages are used for the network configuration, node commissioning and IO connection
initialization. They are determined by a service code (command) and destination
designators: Class, Instance and Attribute. Once the command is executed, the connection
is closed. The IO connections (Bit-strobe, Poll, Change-of-state/COS and Cyclic) are used for
the continuous IO data exchange between a scanner and nodes. All messages are organized
in 4 groups, where group 1 has the highest priority on the bus and group 4 the lowest.
Each DeviceNet device has integrated a CAN controller which is used for communication.
It generates noise immune, differential, communication signals that carries data over the
network. CAN uses a bitwise arbitration method called CSMA/BA (carrier sense multiple
access / bitwise arbitration), that assures the highest priority message always gets access to
the bus in the event of multiple device requests for data transmission. The CAN stands for
the Controller Area Network as defined by the Bosch CAN Specification V2.0 and ISO 118981 standard. These standards are the foundation of the Common Industrial Protocol (CIP),
the DeviceNet adaptation of CIP (the DeviceNet Specification), by Open DeviceNet Vendor
Association, Inc. (ODVA).
J27 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Industrial Ethernet
SW
SW
G
G
DevicenetTM 1
TR
TR
B
B
DevicenetTM 2
Segment A
TR
R
R
Segment B
TR
Interacting With DeviceNet™
There are three levels of interaction involving DeviceNet applications:
Appendix: Network Overview
Gateway (G/G) makes data exchange between DeviceNet and other fieldbus networks possible.
They are used as alternative or supplemental devices to reduce the load on the standard
networking techniques or to simplify interconnections. A few examples are: DeviceNet/EtherNet
IP, DeviceNet/PROFINET and DeviceNet/ASi. A gateway usually appears as a single node on a
higher level network and as a scanner on a lower level network. ASi gateway appears as a single
node on the DeviceNet and a master on the ASi network.
Bridge (B/B) provides simple and the least expensive way to exchange data between two
DeviceNet networks. The bridge, also called a Spanner, consists of two DeviceNet nodes which
are electrically and optically isolated from each other. Each node is configured with a scanner
where is resides. Each node has individual address switches and Autobaud capability. The data size
exchanged between bridge nodes is flexible and may be selected during node configuration.
Repeater (R/R) or bus extender is used to extend the length of the network drop beyond 20ft
limitation. The Repeater may be used to create Y shape network or in a warehouse facility
multiple extended drops each up to 1640ft long at 125kB. The DeviceNet design rules apply to
the extended network segment (B) the same way as they apply to the main network segment (A).
The extended segment must have a separate DeviceNet power supply unit; it must be terminated
at both ends and grounded at a single point. Each network segment may have multiple nodes,
whose addresses are unique for the entire network. All nodes are set to the same data rate. The
total number of nodes on all network segments cannot exceed 64 nodes. The number of the
repeaters is not limited; do not cascade repeaters as each one introduces 2ms transmission delay.
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J28
DeviceNet™
Power Supply
Master
DeviceNet
I/O Modules
(slave)
Power Cable
(yellow)
Network Cable
Grey
Basic Parts List
DeviceNet I/O Modules (slaves)
A typical system consists of the following parts:
•
•
•
•
•
Master
Power Supply
DeviceNet I/O Modules (slaves)
Power Cables
Network Cables
System Configuration
DeviceNet stations require a network master (also called a scanner) to interface the stations
to the host controller. TURCK DeviceNet stations are designed to be fully compatible with
DeviceNet equipment from other manufacturers.
J29 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
DeviceNet Cables
DeviceNet cables consist of a shielded and twisted data pair, as well as a shielded and twisted power
pair for the 24 VDC bus power, with an additional outer shield. The drain wire, together with multiple
layers of foil and/or braid that surround data and power pairs, create network shield sufficient to
withstand harsh industrial environment. A key benefit of carrying supply voltage in the network
cable is that many DeviceNet stations do not need a further supply, allowing the user to only need
to run one cable to the station. Some stations, particularly those with high current outputs, can draw
too much power from the DeviceNet power supply. These stations typically have an auxiliary power
connection, allowing the user to use a second power supply for just the I/O. The bus power supply
still powers the DeviceNet communication electronics.
Jacket
Drain Wire
Blue
White
Black
Red
Typical DeviceNet
cable.
Data
Power
Foil Shield
Overall Foil Shield
Braid Shield
Cordsets
minifast connector
Appendix: Network Overview
TURCK offers a complete line of molded DeviceNet™ cordsets to facilitate network installation,
resulting in a faster start-up and fewer wiring errors. The bus and drop cables are specially designed
foil-shielded, high-flex cables with very low inductance and capacitance to minimize propagation
delay time. In most cases, bus cable connections are made using 5-pin minifast® (7/8-16 UN) or
eurofast® (M12) connectors. A variety of stations are also available that support terminal-block type
connections. TURCK cordsets for the DeviceNet system are available in standard lengths.
eurofast connector
Network Power
The DeviceNet power may be provided by single or multiple power supply units. The nominal
voltage and current rating of all power supply units are: 24VDC +/- 1%, up to 16A continuous feed.
The output has to be isolated from AC and a chassis ground. It should be protected against over
voltage or over current. The power supply units have a rise time less than 250ms to reach 5% of its
rated output voltage. When multiple power supply units are used in an application, V+ is broken
between them and only one is grounded.
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J30
DeviceNet™
Networking Grounding
The DeviceNet is grounded at a single point according to the Figure 4. The shield and the
common (V-) of the power supply unit are brought to the same earth-ground point using
a copper braid or #8 grounding wire. The shield must be continuous and serves as only
protection against electrostatic discharge (ESD) and fast electromagnetic interference
transients (EMI), the common source of network communication problems. The location of
the grounding point, affects, the same way as location of the power supply unit, a quality of
the CAN signal and data transmission. The middle of the network load is considered to be the
best possible location for the network grounding.
Power Tap
CAN_L
CAN_H
Drain/Shield
VV+
GND
V-
V+
24 VDC Power Supply
A common mode voltage (CMV) also depends on the location of the network power supply.
The higher common mode, more communication errors is generated. The maximum CMV is
9.3V.
Electronic Data Sheets (EDS) Files
Electronic Data Sheet (EDS) is the DeviceNet configuration file that contains information
about a device: identity, I/O data size and the device’s configurable parameters. The
information provided by EDS files is imported into network configuration tools and guide a
user through the steps necessary to configure a device. EDS files are available on www.turck.
com
Diagnostics
The DeviceNet stations support different diagnostics information which depends on their
complexity and functionality. The common ground for all devices is that they have to provide
visual diagnostic information using either a pair of status LEDs called MOD and NET LEDs or
use a single combined MOD/NET led. The behavior of these LED is described hereafter.
TURCK discrete IO modules provide diagnostic data as a part of input data map. The standard
stations support group diagnostics, where a single alarm bit is set if any IO is faulted. The
deluxe station support individual IO diagnostic data, like open wire and short wire alarm bits.
All TURCK devices support MOD and NET LED diagnostics as follows:
J31 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
MOD – Module Status LED
indicates internal status of the device
LED color
Off
status
indication
Not Powered
There is no power applied to the device.
Flashing Green
Device in Standby state. Autobaud
detection not completed.
• Device needs commissioning due to
configuration missing, incomplete or
incorrect.
• Device is not in a scan list. Configure
device.
• Autobaud detection not completed. Check
CAN lines.
Green
Device Operational
Device operating normally.
Flashing Red
Minor Recoverable Fault
Recoverable fault. For devices with group
diagnostic it indicates I/O fault. Check I/O
for short.
Red
Major Unrecoverable Fault
The device has an unrecoverable fault; may
need replacing.
Flashing Red-Green
Device is powered and in self-test
mode.
Self-test mode during power-up sequence.
NET – Network Status LED
indicates internal status of the device
status
indication
Off
Not Powered,
Not On-Line
• No network power.
• Device may not be powered.
• Device has not completed DupMacID test
yet.
Flashing Green
On-Line,
Not Connected
Device has passed DupMacID test, it is
online, device is not allocated to a master.
Device is not in a scan list.
Green
Device Operational,
On-Line and Connected
Device is configured, connected and
communicating.
Flashing Red
Connection Time-Out
One or more I/O connections are in
timed out state.
Red
Critical Fault or Critical Link Failure
Failed communication device. The device
has detected an error that has rendered
it incapable of communicating on the
network. Bus-off.
Flashing Red-Green
Device is powered and in
self-test mode.
Self-test mode during power-up sequence.
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Appendix: Network Overview
LED color
B3027 J32
DeviceNet™
Addressing
The DeviceNet™ supports 64 nodes, which are assigned addresses from 0 to 63. The address
0 is usually assigned to a scanner, addresses 1 through 61 may be assigned to different
nodes, address 62 is reserved for a configuration tool, address 63 must be always free and
it is reserved for node commissioning. The station’s default node address (out of box) is 63.
Each node’s address must be initially set, usually via rotary dials or switches on the node. The
address can also be set with a DeviceNet configuration tool. Changes to the address settings
take effect when the station power is cycled. Every device supports duplicate address
detection mechanism (DupMACID) that prevents multiple nodes to occupy the same node
address. The DupMACID is run at the device power up. The Device shuts down (goes into busoff state) when it detects that there is another device at the same node address.
Data Rate
The data rate or baud rate is the speed of data transmission over the DeviceNet. The
DeviceNet operates at three data rates: 125kbps, 250kbps and 500kbps (kilobits per second).
All devices must be set to the same data rate in order to have functional network. A failure to
do so may result in a critical network fault, forcing entire network or some devices to go into
bus-off state. The bus-off state is a state of a device (i.e. CAN chip) when it detects an error
that has rendered it incapable of communication on the network.
The data rate is selected using a data rate switch. In general, the switch may have 4 positions
marked: 125, 250, 500 and PGM (programmable mode). Instead of the data rate switch, many
devices support Autobaud detection mechanism that automatically detects network data
rate during power up and sets the device baud rate accordingly. The Autobaud and data
rate are supported by the device parameters that can be enabled/disabled and set using the
device EDS file (Electronic Data Sheet).
J33 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Network Length
The DeviceNet bus uses trunk and drop topology. The trunk is the main communication
cable, and requires a 121 ohm resistor at both ends. The maximum length of the trunk
depends on the communication rate and the cable type. Drops are branches off the trunk,
and may be from zero to 6 m (20 ft) in length. The cumulative drop lengths are dependent on
the communication rate. The following table shows the maximum ratings for a trunk using
the most common cable types as defined by the DeviceNet specification.
communication
rate
thick trunk
length
(maximum)
Mid Trunk
Length
(maximum)
thin trunk
length
(maximum)
flat trunk
length
(maximum)
125 kbps
500 m (1640 ft.)
300 m (984 ft.)
100 m (328 ft.)
420 m (1378 ft.)
250 kbps
250 m (820 ft.)
250 m (820 ft.)
100 m (328 ft.)
200 m (656 ft.)
500 kbps
100 m (328 ft.)
100 m (328 ft.)
100 m (328 ft.)
75 m (246 ft.)
minifast
Male
Pinouts
Female
eurofast
Male
Drop Length
(maximum per
drop)
Drop Length
(cumulative)
156 m (512 ft.)
6 m (20 ft.)
78 m (256 ft.)
39 m (128 ft.)
Combicon
Female
Female Front
1 = Black (-Voltage)
2 = Blue (CAN_L)
3 = Bare (Shield Drain)
4 = White (CAN_H)
5 = Red (+Voltage)
Appendix: Network Overview
1 = Bare (Drain)
2 = Red (V+)
3 = Black (V-)
4 = White (CAN-H)
5 = Blue (CAN-L)
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J34
Warranty terms and conditions
RISK OF LOSS
Delivery of the equipment to a common carrier shall constitute delivery to the Purchaser and the risk of loss shall transfer at that time to Purchaser. Should
delivery be delayed due to an act or omission on the part of the Purchaser, risk of loss shall transfer to the Purchaser upon notification by TURCK Inc. that the
order is complete and ready for shipment.
WARRANTIES
TURCK INC. (hereinafter “TURCK”) offers five (5) WARRANTIES to cover all products sold. They are as follows:
1) The 12-MONTH WARRANTY is available for the products listed - generally those not covered by
LIFETIME, 5-YEAR, 24-MONTH or 18-MONTH warranty. No registration required.
2) The 18-MONTH WARRANTY is available for the products listed - generally those not covered by
LIFETIME or 5-YEAR WARRANTY. No registration is required.
3) The 24-MONTH WARRANTY is available for the products listed - generally those not covered by
LIFETIME, 5-YEAR or 18-MONTH. No registration is required.
4) The 5-YEAR WARRANTY is available generally for the products listed. No registration is required.
5) A LIFETIME WARRANTY is available for the products listed. It becomes effective when the accompanying
TURCK LIFETIME WARRANTY REGISTRATION is completed and returned to TURCK.
GENERAL TERMS AND CONDITIONS FOR ALL WARRANTIES
• 12-MONTH STANDARD WARRANTY
• 18-MONTH STANDARD WARRANTY
• 24-MONTH STANDARD WARRANTY
• 5-YEAR WARRANTY
• LIFETIME WARRANTY
TURCK warrants the Products covered by the respective WARRANTY AGREEMENTS to be free from defects in material and workmanship under normal and
proper usage for the respective time periods listed above from the date of shipment from TURCK. In addition, certain specific terms apply to the various
WARRANTIES.
THESE EXPRESS WARRANTIES ARE IN LIEU OF AND EXCLUDE ALL OTHER REPRESENTATIONS MADE - BOTH EXPRESSED AND IMPLIED. THERE ARE NO
WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE FOR PRODUCTS COVERED BY THESE TERMS AND CONDITIONS.
TURCK warrants that the goods sold are as described, but no promise, description, affirmation of fact, sample model or representation, oral or written shall
be part of an order, unless set forth in these terms and conditions, or are in writing and signed by an authorized representative of TURCK. These WARRANTIES
do not apply to any Product which has been subject to misuse, negligence, or accident - or to any Product which has been modified or repaired, improperly
installed, altered, or disassembled - except according to TURCK’s written instructions.
These WARRANTIES are subject to the following conditions:
1) These WARRANTIES are limited to the electronic and mechanical performance only, as
expressly detailed in the Product specifications and NOT to cosmetic performance.
2) These WARRANTIES shall not apply to any cables attached to, or integrated with the Product.
However, the 18-MONTH WARRANTY shall apply to cables sold separately by TURCK.
3) These WARRANTIES shall not apply to any Products which are stored, or utilized, in harsh
environmental or electrical conditions outside TURCK’s written specifications.
4) The WARRANTIES are applicable only to Products shipped from TURCK subsequent
to January 1, 1988.
ADDITIONAL SPECIFIC TERMS FOR:
(12-MONTH STANDARD WARRANTY) for Linear Displacement Transducers, EZ Track, RFID Products, Draw Wire Assemblies and Slip Rings.
(18-MONTH STANDARD WARRANTY) FOR Q-TRACK INDUCTIVE SENSORS, ULTRASONIC SENSORS, FLOW SENSORS, PRESSURE SENSORS, TEMPERATURE
SENSORS, INCLINOMETERS, CABLES AND ALL NON-SENSING PRODUCTS SOLD BY TURCK INC. INCLUDING MULTI-SAFE, MULTI-MODUL,
MULTI-CART AND RELATED AMPLIFIER PRODUCTS, RELAYS AND TIMERS.
(24-MONTH STANDARD WARRANTY) FOR ENCODERS excluding Draw Wire Assemblies.
5-YEAR WARRANTY FOR INDUCTIVE AND CAPACITIVE PROXIMITY SENSORS: The periods covered for the above WARRANTIES and Products shall be 12
MONTHS, 18-MONTHS, 24-MONTHS and 5-YEARS, respectively, from the date of shipment from TURCK.
LIFETIME WARRANTY (OPTIONAL - REGISTRATION REQUIRED) FOR INDUCTIVE, INDUCTIVE MAGNET OPERATED AND CAPACITIVE PROXIMITY SENSORS
SOLD TO THE ORIGINAL PURCHASER FOR THE LIFETIME OF THE ORIGINAL APPLICATION.
J35 B3027
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
Warranty terms and conditions
The following terms apply to the LIFETIME WARRANTY in addition to the General Terms:
1) This WARRANTY shall be effective only when the LIFETIME WARRANTY REGISTRATION has been completed, signed by the End User and an authorized TURCK
Representative or Distributor and has been received by TURCK no later than six (6) months after installation in the End User’s Plant, or two (2) years from the
date product was shipped from TURCK, whichever is sooner.
2) This warranty is available only to TURCK’s authorized Representatives, Distributors and to the Original User. (The term “Original User” means that person, firm,
or corporation which first uses the Product on a continuous basis in connection with the operation of a production line, piece of machinery, equipment, or
similar device.) In the event the ownership of the product is transferred to a person, firm or corporation other than the Original User, this WARRANTY shall
terminate.
3) This WARRANTY is applicable only to the Original Application. In the event the machinery, equipment, or production line to which the Product is connected,
or on which it is installed, is substituted, changed, moved or replaced, the WARRANTY shall terminate. 4) This WARRANTY shall be valid only if the Product was purchased by the Original User from TURCK, or from an authorized TURCK Distributor, or was an integral
part of a piece of machinery and equipment obtained by the Original user from an Original Equipment Manufacturer, which itself, was purchased directly
from TURCK or from an authorized Distributor.
PURCHASER’S REMEDIES
This Remedy shall apply to all WARRANTIES. If a TURCK Distributor desires to make a WARRANTY Claim, the Distributor shall, if requested by TURCK, ship
the Product to TURCK’s factory in Minneapolis, Minnesota, postage or freight prepaid. If the User desires to make a WARRANTY Claim, they shall notify the
authorized TURCK Distributor from whom it was purchased or, if such Distributor is unknown, shall notify TURCK. TURCK shall, at its option, take any of the
following two courses of action for any products which TURCK determines are defective in materials or workmanship.
1) Repair or replace the Product and ship the Product to the Original Purchaser or to the authorized TURCK Distributor, postage or freight prepaid; or
2) Repay to the Original Purchaser that price paid by the Original Purchaser; provided that if the claim is made under the LIFETIME WARRANTY, and such Product
is not then being manufactured by TURCK, then the amount to be repaid by TURCK to the Original Purchaser shall be reduced according to the following
schedule:
Number of Years Since Date Percent of Original Purchase
of Purchase by Original Purchaser Price To Be Paid by TURCK
10 50%
15 25%
20 10%
More than 20 5%
CONSIDER SAFETY AND PROTECTION PRECAUTIONS
TURCK takes great care to design and build reliable and dependable products, however, some products can fail eventually. You must take precautions to
design your equipment to prevent property damage and personal injury in the unlikely event of failure. As a matter of policy, TURCK does NOT recommend the
installation of electronic controls as the sole device FOR THE PROTECTION OF PERSONNEL in connection with power driven presses, brakes, shears and similar
equipment and, therefore, the customer should build in redundancy or dual control using approved safety devices for these applications.
TURCK Inc. sells its products through Authorized Distributors. These
distributors provide our customers with technical support, service and
local stock. TURCK distributors are located nationwide - including all major
metropolitan marketing areas.
For Application Support or for the location of your nearest TURCK
distributor, call:
1-800-544-7769
Specifications in this manual are subject to change without notice. TURCK
also reserves the right to make modifications and makes no guarantee of
the accuracy of the information contained herein.
www.turck.us • 1-800-544-7769 • Fax: (763) 553-0708 • TURCK • Minneapolis, MN 55441
Courtesy of Steven Engineering, Inc. - (800) 258-9200 - [email protected] - www.stevenengineering.com
B3027 J36
Appendix: Network Overview
PURCHASER’S REMEDIES SHALL BE LIMITED EXCLUSIVELY TO THE RIGHT OF REPLACEMENT, REPAIR OR REPAYMENT AS PROVIDED AND DOES NOT
INCLUDE ANY LABOR COST OR REPLACEMENT AT ORIGINAL PURCHASER’S SITE. TURCK SHALL NOT BE LIABLE FOR
ANY CONSEQUENTIAL DAMAGES RESULTING FROM ANY BREACH OF ANY WARRANTY, EXPRESSED OR IMPLIED, APPLICABLE TO THE PRODUCT,
INCLUDING WITHOUT LIMITATION, ANY DAMAGES RESULTING FROM PROPERTY DAMAGE, PERSONAL INJURY OR BUSINESS INTERRUPTION.
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement