ISO INTERNATIONAL STANDARD 15519-2 First edition 2015-06-01 Specifications for diagrams for process industry - Part 2: Measurement and control Specifications pour schémas de I'industrie de traitement - Partie 2: Mesurage et controle Reference number ISO 15519-2:2015(E) LSO International Organization for Standardization ng Institute of Standardization 5956617 @ IS0 2015 vided by IHS under itted without license from IHS IS0 15519-2:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS02015,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Intenationaibr PrganizationforStandardization etworking permitted without license from IHS IS0 15519-2:2015(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope. 2 Normative references 3 Terms, definitions, and abbreviated terms. 3.1 Terms related to control ..1 3.2 Document types.. 3.3 Abbreviated terms .3 4 Documentation and process control principles ..3 4.1 Introduction 4.2 Diagram types, structures, and life cycle aspects. 4 4.3 Process control interrelations. 4.4 Information exchange between process and control systems .6 Exchange of process control information 1 5 5.1 Symbols for information exchange. 5.1.1 General. 1 5.1.2 Placement of information inside the PCI symbol. .8 5.1.3 Placement of information outside the PCI symbol .9 5.2 Lettercodes. .9 5.2.1 General 5.2.2 Representation of letter codes for process variables 9 5.2.3 Representation of letter codes for control functions .10 5.2.4 Sequence of letter codes for control functions .11 5.2.5 Modifying letter codes ..12 5.3 Reference designation ..13 6 Representation in general .13 6.1 General ..13 6.2 Signal lines. ..13 6.3 Graphical symbols .14 6.3.1 General. ..14 6.3.2 Instruments with integrated display .14 6.3.3 Multifunction instruments .14 6.3.4 Instruments forming a group. .15 6.3.5 Differentiating of representation ..15 6.3.6 Graphical symbol "groups" in diagrams .15 7 Representation in diagrams ..15 7.1 Introduction .15 7.2 Process flow diagram, PFD .16 7.2.1 Description. .16 7.2.2 Application. ..16 7.2.3 Contents .16 7.2.4 Representation .17 7.3 Process and instrumentation diagram, PID .18 7.3.1 Description. .18 7.3.2 Application. .18. 7.3.3 Contents. .18 7.3.4 Representation .19 7.4 Process control diagram, PCD 20 7.4.1 Description. .20 7.4.2 Application. .21 7.4.3 Contents. .21 7.4.4 Representation 21 Inteatinal oganzation @stS201.5 - All rights reserved iii iseeZhejang Insttute of Standardization 5956617 ed without license from IHS Not for Resale, 2015/8/7 05:48:59