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BS EN IEC 61804-2:2018 – TC:2020 Edition

BS EN IEC 61804-2:2018 – TC:2020 Edition

$280.87

Tracked Changes. Function blocks (FB) for process control and electronic device description language (EDDL) – Specification of FB concept

Published By Publication Date Number of Pages
BSI 2020 186
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IEC 61804-2:2018 specifies FB (function blocks)  by using the result of a harmonization work as regards several elements. a) The device model which defines the components of an IEC 61804-2 conformant device. b) Conceptual specifications of FBs for measurement, actuation and processing. This includes general rules for the essential features to support control, whilst avoiding details which stop innovation as well as specialization for different industrial sectors. c) The electronic device description (EDD) technology, which enables the integration of real product details using the tools of the engineering life cycle. This third edition cancels and replaces the second edition published in 2006 and integrates parts of IEC 61804-1 which was withdrawn in January 2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) added command communication mapping in Clause 8; b) moved and reword compatibility level definition from IEC 62804-1 to new Annex B and terms and definitions; c) added proxy concept in new Annex C.

PDF Catalog

PDF Pages PDF Title
108 undefined
111 English
CONTENTS
114 FOREWORD
116 INTRODUCTION
Figures
Figure 1 – Position of IEC 61804-2 related to other standards and products
118 1 Scope
2 Normative references
3 Terms, definitions, abbreviated terms and conventions
3.1 Terms and definitions
127 3.2 Abbreviated terms
128 3.3 Conventions for lexical structures
Tables
Table 1 – Field attribute descriptions
129 4 General function block (FB) definition and EDD model
4.1 Device structure (device model)
4.1.1 Device model description
Figure 2 – FB structure is derived out of the process (P&ID view)
130 Figure 3 – FB structure may be distributed between devices (according to IEC 61499-1)
131 Figure 4 – IEC 61804 FBs can be implemented in different devices
Figure 5 – General components of devices
132 4.1.2 FB type
Figure 6 – Block types of IEC 61804 (all parts)
133 Figure 7 – IEC 61804 block overview (graphical representation not normative)
134 4.1.3 FB execution
135 4.1.4 Reference between IEC 61499 and IEC 61804 models
4.1.5 UML specification of the device model
Table 2 – Equivalences between IEC 61804 and IEC 61499 model elements
136 Figure 8 – UML class diagram of the device model
137 4.1.6 Classification of the algorithms
138 4.1.7 Algorithm description
4.1.8 Input and output variables and parameter definition
Table 3 – Variables and parameter description template
139 4.1.9 Choice of variables and parameters
4.1.10 Mode, Status and Diagnosis
4.2 Block combinations
4.2.1 Measurement channel
140 4.2.2 Actuation channel
Figure 9 – Measurement process signal flow
Figure 10 – Actuation process signal flow
141 4.2.3 Application
4.3 EDD and EDDL model
4.3.1 Overview of EDD and EDDL
Figure 11 – Application process signal flow
142 4.3.2 EDD architecture
4.3.3 Concepts of EDD
4.3.4 Principles of the EDD development process
143 4.3.5 Interrelations between the lexical structure and formal definitions
Figure 12 – EDD generation process
144 4.3.6 Builtins
4.3.7 Profiles
5 Detailed block definition
5.1 General
5.2 Application FBs
5.2.1 Analog Input FB
145 Figure 13 – Analog Input FB
146 5.2.2 Analog Output FB
Figure 14 – Analog Output FB
147 5.2.3 Discrete Input FB
148 Figure 15 – Discrete input FB
149 5.2.4 On/Off Actuation FB Discrete Output FB
Figure 16 – Discrete Output FB
150 5.2.5 Calculation FB
151 5.2.6 Control FB
Figure 17 – Calculation FB
152 Figure 18 – Control FB
153 5.3 Component FBs
5.4 Technology Block
5.4.1 Temperature Technology Block
Figure 19 – Temperature Technology Block
155 Table 4 – Example of temperature sensors of Sensor_Type
156 5.4.2 Pressure Technology Block
157 Figure 20 – Pressure Technology Block
158 5.4.3 Modulating Actuation Technology Block
159 Figure 21 – Modulating Actuation Technology Block
160 5.4.4 On/Off Actuation Technology Block
161 Figure 22 – On/Off Actuation Technology Block
163 5.5 Device (Resource) Block
5.5.1 Identification
5.5.2 Device state
Table 5 – Device status state table
164 Figure 23 – Harel state chart
165 5.5.3 Message
5.5.4 Initialisation
5.6 Algorithms common to all blocks
5.6.1 Data Input/Data Output status
Table 6 – Device status transition table
166 5.6.2 Validity
5.6.3 Restart Initialisation
5.6.4 Fail-safe
167 5.6.5 Remote Cascade Initialisation
6 FB Environment
7 Mapping to System Management
168 8 Mapping to Communication
Figure 24 – Application structure of ISO OSI Reference Model
169 Figure 25 – Client/Server relationship in terms of OSI Reference Model
Figure 26 – Mapping of IEC 61804 FBs to APOs
171 Annex A (informative)Parameter description
Table A.1 – Parameter description
177 Annex B (informative)Compatibility levels
B.1 General
Figure B.1 – Levels of functional device compatibility
178 B.2 Compatibility
B.3 Incompatibility
Table B.1 – Functionality features
179 B.4 Coexistence
B.5 Interconnectability
B.6 Interworkability
B.7 Interoperability
180 B.8 Interchangeability
181 Annex C (informative)Proxy concept and its use in FB applications
C.1 General proxy concept
Figure C.1 – Proxy model class diagram
182 C.2 Use of the proxy concept in FB applications
Figure C.2 – Proxy integration in DCS
184 Bibliography

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