IO-Link Interface and System Specification

1 IO-Link Interface and System Specification Version July 2013 Order No: IO-Link Interface and System Specification Version _____ _____ Copyright IO-Link Community 2013 - All Rights Reserved Page 2 of 262 File name: IOL- Interface -Spec_10002_V112_Jul13 Prepared, approved and released by the IO-Link Community. The IO-Link technology is currently going to be standardized as IEC 61131-9 (FDIS published) based on this document. The IO-Link Community is a D-Liaison member in the corresponding IEC working group. This document covers all Change Requests within the IO-Link CR database up to ID 50.

2 Any comments, proposals, requests on this document are appreciated through the IO-Link CR database Please provide name and email address. Login: IO-Link -V112 Password: Report Important notes: NOTE 1 The IO-Link Community Rules shall be observed prior to the development and marketing of IO-Link products. The document can be downloaded from the portal. NOTE 2 Any IO-Link device shall provide an associated IODD file. Easy access to the file and potential updates shall be possible. It is the responsibility of the IO-Link device manufacturer to test the IODD file with the help of the IODD-Checker tool available per download from NOTE 3 Any IO-Link devices shall provide an associated manufacturer declaration on the conformity of the device with this Specification , its related IODD, and test documents, available per download from Disclaimer: The attention of adopters is directed to the possibility that compliance with or adoption of IO-Link Community specifications may require use of an invention covered by patent rights.

3 The IO-Link Community shall not be responsible for identifying patents for which a license may be required by any IO-Link Community Specification , or for conducting legal inquiries into the legal validity or scope of those patents that are brought to its attention. IO-Link Community specifications are prospective and advisory only. Prospective users are responsible for protecting themselves against liability for infringement of patents. The information contained in this document is subject to change without notice. The material in this document details an IO-Link Community Specification in accordance with the license and notices set forth on this page.

4 This document does not represent a commitment to implement any portion of this Specification in any company's products. WHILE THE INFORMATION IN THIS PUBLICATION IS BELIEVED TO BE ACCURATE, THE IO-Link COMMUNITY MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL INCLUDING, BUT NOT LIMITED TO ANY WARRANTY OF TITLE OR OWNERSHIP, IMPLIED WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR USE. In no event shall the IO-Link Community be liable for errors contained herein or for indirect, incidental, special, consequential, reliance or cover damages, including loss of profits, revenue, data or use, incurred by any user or any third party.

5 Compliance with this Specification does not absolve manufacturers of IO-Link equipment, from the requirements of safety and regulatory agencies (T V, BIA, UL, CSA, etc.). is registered trade mark. The use is restricted for members of the IO-Link Community. More detailed terms for the use can be found in the IO-Link Community Rules on Conventions: In this Specification the following key words (in bold text) will be used: may: indicates flexibility of choice with no implied preference. should: indicates flexibility of choice with a strongly preferred implementation. shall: indicates a mandatory requirement.

6 Designers shall implement such mandatory requirements to ensure interoperability and to claim conformity with this Specification . Publisher: IO-Link Community Haid-und-Neu-Str. 7 76131 Karlsruhe Germany Phone: +49 721 / 96 58 590 Fax: +49 721 / 96 58 589 E-mail: Web site: No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the Interface and System IO-Link 3 Version CONTENTS FOREWORD .. 19 INTRODUCTION .. 21 1 Scope .. 23 2 Normative references .. 23 3 Terms, definitions, symbols, abbreviated terms and conventions.

7 24 Terms and definitions .. 24 Symbols and abbreviated 28 Conventions .. 30 General .. 30 Service parameters .. 30 Service procedures .. 31 Service attributes .. 31 Figures .. 31 Transmission octet order .. 32 Behavioral descriptions .. 32 4 Overview of SDCI (IO-LinkTM) .. 32 Purpose of technology .. 32 Positioning within the automation hierarchy .. 33 Wiring, connectors and power .. 34 Communication features of SDCI .. 34 Role of a Master .. 36 SDCI configuration .. 37 Mapping to fieldbuses .. 37 Standard structure .. 37 5 Physical Layer (PL) .. 38 General .. 38 Basics .. 38 Topology .. 38 Physical layer services.

8 39 Overview .. 39 PL services .. 40 Transmitter/Receiver .. 41 Description method .. 41 Electrical requirements .. 42 Timing requirements .. 46 Power supply .. 50 Power supply options .. 50 Power-on 50 Medium .. 51 Connectors .. 51 52 6 Standard Input and Output (SIO) .. 53 7 Data link layer (DL) .. 53 General .. 53 Version 4 IO-Link Interface and System IO-Link Data link layer services .. 55 DL-B services .. 55 DL-A services .. 66 Data link layer protocol .. 71 Overview .. 71 DL-mode handler .. 71 Message handler .. 79 Process Data handler .. 87 On-request Data handler .. 90 ISDU handler.

9 93 Command handler .. 97 Event handler .. 99 8 Application layer (AL) .. 102 General .. 102 Application layer services .. 103 AL services within Master and Device .. 103 AL Services .. 104 Application layer protocol .. 112 Overview .. 112 On-request Data transfer .. 112 Event processing .. 118 Process Data cycles .. 121 9 System management (SM) .. 122 General .. 122 System management of the Master .. 122 Overview .. 122 SM Master services .. 124 SM Master protocol .. 129 System management of the Device .. 136 Overview .. 136 SM Device services .. 138 SM Device protocol .. 144 10 Device .. 151 Overview.

10 151 Process Data Exchange (PDE) .. 152 Parameter Manager (PM) .. 152 General .. 152 Parameter manager state machine .. 152 Dynamic parameter .. 154 Single parameter .. 155 Block parameter .. 156 Concurrent parameterization access .. 158 Command handling .. 158 Data Storage (DS) .. 158 General .. 158 Data Storage state machine .. 158 DS configuration .. 160 DS memory space .. 160 DS Index_List .. 161 IO-Link Interface and System IO-Link 5 Version DS parameter availability .. 161 DS without ISDU .. 161 DS parameter change indication .. 161 Event Dispatcher (ED) .. 161 Device features.