CEI EN 61131-9 : 2014

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions, symbols,
  abbreviated terms and conventions
4 Overview of SDCI (IO-LinkTM)
5 Physical Layer (PL)
6 Standard Input and Output (SIO)
7 Data link layer (DL)
8 Application layer (AL)
9 System management (SM)
10 Device
11 Master
Annex A (normative) - Codings, timing
        constraints, and errors
Annex B (normative) - Parameter and
        commands
Annex C (normative) - ErrorTypes
        (ISDU errors)
Annex D (normative) - EventCodes
        (diagnosis information)
Annex E (normative) - Data types
Annex F (normative) - Structure of the
        Data Storage data object
Annex G (normative) - Master and Device
        conformity
Annex H (informative) - Residual error
        probabilities
Annex I (informative) - Example sequence
        of an ISDU transmission
Annex J (informative) - Recommended methods
        for detecting parameter changes
Annex ZA (normative) - Normative references
         to international publications with
         their corresponding European
         publications
Bibliography

Describes a single-drop digital communication interface technology for small sensors and actuators SDCI (commonly known as IO-Link'2), which extends the traditional digital input and digital output interfaces as defined in IEC 61131-2 towards a pointto-point communication link. This technology enables the transfer of parameters to Devices and the delivery of diagnostic information from the Devices to the automation system.