SIST EN 50325-3:2002
(Main)Industrial communications subsystem based on ISO 11898 (CAN) for controller-device interfaces -- Part 3: Smart Distributed System (SDS)
Industrial communications subsystem based on ISO 11898 (CAN) for controller-device interfaces -- Part 3: Smart Distributed System (SDS)
Standard exists in English only
Industrial communications subsystem based on ISO 11898 (CAN) for controller-device interfaces - Part 3: Smart Distributed System (SDS)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 50325-3:2002
01-junij-2002
Industrial communications subsystem based on ISO 11898 (CAN) for controller-
device interfaces - Part 3: Smart Distributed System (SDS)
Industrial communications subsystem based on ISO 11898 (CAN) for controller-device
interfaces -- Part 3: Smart Distributed System (SDS)
Ta slovenski standard je istoveten z: EN 50325-3:2001
ICS:
35.240.50 Uporabniške rešitve IT v IT applications in industry
industriji
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SIST EN 50325-3:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50325-3:2002
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SIST EN 50325-3:2002
EUROPEAN STANDARD EN 50325-3
NORME EUROPÉENNE
EUROPÄISCHE NORM April 2001
ICS 43.180
English version
Industrial communications subsystem based on ISO 11898 (CAN)
for controller-device interfaces
Part 3: Smart Distributed System (SDS)
This European Standard was approved by CENELEC on 2000-04-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists only in English. A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the Central
Secretariat has the same status as the official version.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50325-3:2001 E
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SIST EN 50325-3:2002
EN 50325-3:2001 - 2 -
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 65CX, Fieldbus.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by
CENELEC as EN 50325-3 on 2000-04-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2001-10-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2003-04-01
EN 50325 is divided into three parts:
Part 1 General requirements
Part 2 DeviceNet
Part 3 Smart Distributed System (SDS)
The specifications for DeviceNet and SDS are based on ISO 11898 Controller area network (CAN) for
high-speed communication, a broadcast-oriented communications protocol. However, ISO 11898 specifies
only part of a complete communication system, and additional specifications are needed for other layers to
ensure precise data exchange functionality and support of inter-operating devices. The DeviceNet and
SDS specifications build on ISO 11898 to describe a complete industrial communication system.
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SIST EN 50325-3:2002
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Contents
Introduction. 5
General information on licensing . 6
1 Scope. 7
2 Normative references . 7
3 Definitions, abbreviations and symbols . 8
3.1 Definitions. 8
3.1.1 Application Layer .8
3.1.2 Application Layer Protocol (ALP).8
3.1.3 Application Layer Protocol Data Unit (APDU) .8
3.1.4 Application Layer Service.8
3.1.5 Autobaud.8
3.1.6 Change Of State (COS) .8
3.1.7 Change Of Value (COV) .8
3.1.8 Confirm .8
3.1.9 Data Link Layer Protocol Data Unit (DLPDU) .8
3.1.10 Embedded Object .8
3.1.11 Embedded Object Identifier.9
3.1.12 Indication.9
3.1.13 Logical Device .9
3.1.14 Network .9
3.1.15 Object Model .9
3.1.16 Physical Component.9
3.1.17 Physical Layer Interface PLI.9
3.1.18 Primitive .9
3.2 Abbreviations. 9
3.3 Symbols. 10
3.3.1 (+) .10
3.3.2 (-) .10
3.3.3 (=) .10
4 Relationship with the OSI Reference Model . 10
5 Characteristics. 10
5.1 SDS Network. 10
5.1.1 Network .10
5.1.2 Modelling.11
5.1.3 Hierarchy.12
5.2 SDS Application Layer Services. 13
5.2.1 Service conventions.13
5.2.2 Read service.16
5.2.3 Write service.16
5.2.4 Event service.17
5.2.5 Action service .18
5.2.6 Change Of State ON (COS ON) service.18
5.2.7 Change Of State OFF (COS OFF) service.19
5.2.8 Write State ON (WRITE ON) service.19
5.2.9 Write State OFF (WRITE OFF) service.19
5.3 SDS Application Layer Protocol. 20
5.3.1 Application Protocol Data Unit (APDU).20
5.3.2 APDU Forms .21
5.3.3 Error Codes .28
5.3.4 Data types .29
5.4 SDS APDUs embedded in CAN frames. 33
5.5 Example Short Form APDUs. 36
5.6 Example Long Form APDUs. 37
6 Product information . 37
6.1 Instructions for installation, operation and maintenance. 37
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6.2 Marking . 37
7 Normal service, transport and mounting conditions. 37
7.1 Normal service conditions . 37
7.1.1 General .37
7.1.2 Ambient air temperature .38
7.1.3 Altitude.38
7.1.4 Humidity.38
7.1.5 Pollution degree.38
7.1.6 Sealed connectors .38
7.2 Conditions during transport and storage. 38
7.3 Mounting . 38
8 Constructional and performance requirements. 38
8.1 SDS Physical Layer Interface (PLI) . 38
8.1.1 SDS power PLI .38
8.1.2 Transceivers.39
8.1.3 Transceiver specifications.39
8.1.4 Indicating means .41
8.2 SDS Network. 41
8.2.1 Topology .41
8.2.2 SDS power distribution .42
8.2.3 Auxiliary power ground connection.43
8.3 Electromagnetic Compatibility (EMC) . 43
8.3.1 General requirements for electromagnetic compatibility tests.43
8.3.2 General test conditions for electromagnetic compatibility tests.43
8.3.3 Immunity requirements.44
8.3.4 Emission requirements .46
9 SDS Communication channel type tests. 46
9.1 General . 46
9.2 Product Model . 46
9.3 Object Model test . 47
9.3.1 General .47
9.3.2 Attributes.47
9.3.3 Actions .48
9.3.4 Events .48
9.3.5 Short form services COS ON and COS OFF.48
9.3.6 Short form services WRITE ON and WRITE OFF .49
9.4 Physical Layer Test . 49
9.4.1 Transceiver functional test .49
9.4.2 Transceiver Input Resistance.49
9.4.3 Transceiver input levels .49
9.4.4 Transceiver output levels .50
9.4.5 SDS power .51
9.5 Application Layer Test.53
9.5.1 ALP Services .53
9.5.2 Logical Device functions .57
9.5.3 Network functions .58
9.6 System test . 59
9.6.1 System test set-up.59
9.6.2 Non-participative system testing .59
9.6.3 Participative system testing.59
9.6.4 Other basic system testing.60
9.7 Electromagnetic Compatibility Test . 60
9.7.1 General .60
9.7.2 Fast transient/burst immunity.60
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Introduction
The Smart Distributed System (SDS) is intended for use in, but is not limited to, industrial automation
applications. These applications may include devices such as limit switches, proximity sensors,
electro-pneumatic valves, relays, motor starters, operator interface panels, analogue inputs, analogue
outputs, and controllers.
SDS provides for the connection of intelligent devices such as sensors, actuators and other
components to one or more controllers. SDS functionality may be integrated directly into the devices
or be in modules allowing the connection of conventional components to the network.
The SDS network consists of one or more controllers connected to up to 126 Logical Devices. In
addition to the process data, SDS allows for the transmission of parameters and diagnostic data. The
data exchange may be either event driven, cyclical, multicast or polled. A maximum of 6 bytes of
data may be transmitted without fragmentation.
Topology is typically a single trunk with short branches using a cable comprising two shielded, twisted
pairs with a common earth wire all within a single jacket.
Data is transmitted at rates of 125 kbit/s, 250 kbit/s, 500 kbit/s and 1Mbit/s with maximum system
trunk lengths of 457 m, 182 m, 91 m and 22 m respectively.
Detailed information on the performance is contained in clause 5.
Figure 1 shows an example of an SDS Network.
Physical
Component
Sensor Solenoid
Motor
Controller
Termination
Resistor is
included in the
controller.
Branch
Controller
Tee
Termination
Trunk
Resistor
Figure 1 - Example of an SDS Network
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EN 50325-3:2001 - 6 -
General information on licensing
CENELEC calls attention to the fact that patent rights are linked to EN 50325-3 (Part 3: Smart
Distributed System). The patent holder, Honeywell Inc., has assured to CENELEC that it is willing to
grant a licence under these patents on reasonable and non discriminatory terms and conditions to
anyone wishing to obtain such a license, applying the rules of CEN/CENELEC Memorandum 8.
Honeywell’s undertakings (policy letter on licensing, the license offer and the form of license) in this
respect are on file with CENELEC and available for inspection by all interested parties at the
CENELEC Central Secretariat.
The license details may be obtained from:
The Director
(Industrial Marketing and Applied Technology Sensing and Controls Europe)
Honeywell Control Systems Ltd.
Newhouse Industrial Estate,
Motherwell,
Lanarkshire
Scotland ML1 5SB
GB
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1 Scope
This Part of EN 50325 specifies the following particular requirements for Smart Distributed System
(SDS).
− Requirements for interfaces between control devices and switching elements,
− Normal service conditions for devices,
− Constructional and performance requirements,
− Tests to verify conformance to requirements.
2 Normative references
This Part of EN 50325 incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are
listed hereafter. For dated references, subsequent amendments to or revisions of any of these
publications apply to this Part only when incorporated in it by amendment or revision. For undated
references the latest edition of the publication referred to applies.
EN 55011 1998 Industrial, scientific and medical (ISM) radio-frequency equipment –
Radio disturbance characteristics, limits and methods of
measurement
(CISPR 11:1997, mod.)
EN 60947-1 1999 Low-voltage switchgear and controlgear
Part 1: General rules
(IEC 60947-1:1999, mod.)
EN 61000-4-2 1995 Electromagnetic compatibility (EMC)
Part 4-2: Testing and measurement techniques - Electrostatic
discharge immunity test (IEC 61000-4-2:1995)
EN 61000-4-3 1996 Electromagnetic compatibility (EMC)
Part 4-3: Testing and measurement techniques - Radiated,
radio-frequency, electromagnetic field immunity test
(IEC 61000-4-3:1995, mod.)
EN 61000-4-4 1995 Electromagnetic compatibility (EMC)
Part 4-4: Testing and measurement techniques - Electrical fast
transient/burst immunity test (IEC 61000-4-4:1995)
EN 61000-4-5 1995 Electromagnetic compatibility (EMC)
Part 4-5: Testing and measurement techniques - Surge immunity test
(IEC 61000-4-5:1995)
EN 61000-4-6 1996 Electromagnetic compatibility (EMC)
Part 4-6: Testing and measurement techniques - Immunity to
conducted disturbances, induced by radio-frequency fields
(IEC 61000-4-6:1996)
EN 61131-3 1993 Programmable controllers - Part 3: Programming languages
(IEC 61131-3:1993)
ISO/IEC 7498-1 1994 Information technology - Open Systems Interconnection
Part 1: Basic Reference Model: The Basic Model
ISO TR 8509 1987 Information Processing Systems, Open Systems Interconnection,
Service Conventions
ISO 11898 1993 Road vehicles - Interchange of digital information - Controller area
network (CAN) for high-speed communication
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3 Definitions, abbreviations and symbols
3.1 Definitions
For the purposes of this Part, the following specific terms and definitions apply.
3.1.1 Application Layer
The seventh layer of the ISO/OSI Reference Model. (see ISO/IEC 7498-1).
3.1.2 Application Layer Protocol (ALP)
The rules governing the structure and timing of Application Layer Protocol Data Units that are used to
achieve the services provided by the application layer.
3.1.3 Application Layer Protocol Data Unit (APDU)
The unit of data transfer exchanged between application layers. It is encapsulated within a Data Link
Layer Protocol Data Unit (DLPDU) when transmitted from one component to another.
3.1.4 Application Layer Service
A service provided to the Service User of the application layer. The service may be provided by
means of a specified function call.
3.1.5 Autobaud
A network process for determining the network communication baud rate.
3.1.6 Change Of State (COS)
A report that a binary device has changed state.
3.1.7 Change Of Value (COV)
A report that a device input value has changed by a predetermined amount.
3.1.8 Confirm
A representation of an interaction in which a Service Provider indicates, at a particular service access
point, completion of some procedure previously invoked, at that service access point, by an
interaction represented by a request Primitive. The Confirm is an Application Layer Primitive service.
A Confirm notifies the Service User of the presence of the response. (ISO TR 8509)
3.1.9 Data Link Layer Protocol Data Unit (DLPDU)
A protocol data unit at the data link layer.
3.1.10 Embedded Object
A network-addressable entity within a Logical Device. The Embedded Object may be e.g. an
embedded interface, an embedded device, an embedded function or an embedded function block.
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3.1.11 Embedded Object Identifier
A 5 bit Application Protocol Data Unit field that holds a number used to differentiate between up to 32
Embedded Objects in a Logical Device.
3.1.12 Indication
A representation of an interaction in which an Application Layer Protocol Service Provider indicates
that a procedure has been invoked by the Application Layer Protocol Service User at the peer service
access point. The Indication is an Application Layer Primitive service. The Indication notifies the
Service User of the presence of a request from another device or controller. (ISO TR 8509)
3.1.13 Logical Device
A separate addressable entity within a Physical Component. A Logical Device is connected to the
communications channel via its logical address.
3.1.14 Network
All the physical media, connectors, associated communication elements and a given set of
communicating devices interconnected for the purpose of communication.
3.1.15 Object Model
A description of behaviour and structure that comprises a set of attributes, a set of actions and a set
of events.
3.1.16 Physical Component
A single or modular physical package, including hardware and software and containing one or more
Logical Devices, that is connected to the Network.
3.1.17 Physical Layer Interface PLI
The interface between the Physical Component and the communications media.
3.1.18 Primitive
An implementation-independent representation of an interaction between a Service User and a
Service Provider. Primitive services exist at the Application Layer level. The Primitives are: Request,
Response, Indication and Confirm. (ISO TR 8509)
3.2 Abbreviations
3.2.1 CAN Controller Area Network
3.2.2 EOID Embedded Object Identifier
3.2.3 FI Fragmentation Indicator
3.2.4 R/R Request/Response
3.2.5 RTR Remote Transmission Request
3.2.6 EUT Equipment under Test
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3.3 Symbols
3.3.1 (+)
A qualifying suffix used with Result parameter service descriptions. As a Result qualifier, it refers to a
successful result in Service Convention diagrams.
3.3.2 (-)
A qualifying suffix used with Result parameter service descriptions. As a Result qualifier, it refers to
an unsuccessful result in Service Convention diagrams.
3.3.3 (=)
A qualifying prefix used with Indication and Confirm Primitive service descriptions in Service
Convention diagrams. It means that the Primitive is the same as one occurring at a previous level.
4 Relationship with the OSI Reference Model
The SDS protocol is based on a three-layer architecture.
NOTE 1 These layers constitute a collapsed form of the OSI (Open Systems Interconnection) seven layer
architecture, mapping onto the physical, data link, and application layers of the OSI Reference Model
(ISO/IEC 7498-1).
The Application Layer uses the services provided by the V2.0A CAN Specification data link layer of
ISO 11898.
NOTE 2 Figure 2 compares the architecture of the SDS Protocol Model with the OSI Reference Model.
SDS Protocol Model Corresponding ISO Layers
APPLICATION LAYER APPLICATION LAYER
| PRESENTATION LAYER
| SESSION LAYER
| TRANSPORT LAYER
| NETWORK LAYER
CAN DATA LINK LAYER DATA LINK LAYER
SDS PHYSICAL LAYER PHYSICAL LAYER
Figure 2 - SDS protocol architecture compared with the OSI Reference Model
5 Characteristics
5.1 SDS Network
5.1.1 Network
An SDS Network consists of Physical Components which include input devices, output devices, PLC
interfaces, PC interfaces and interfaces to other Networks, etc. Physical Components are modelled
as collections of Logical Devices that communicate over a physical medium. Figure 3 shows a
logical representation of an SDS Network.
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