IO-Link Master  1.05.01
Abbreviations and Definitions
AL

application layer

C/Q

connection for communication (C) or switching (Q) signal (SIO)

DI

digital input

DL

data link layer

DO

digital output

I/O

input/output

IOL

IO-Link

IOLD

IO-Link Device

IOLM

IO-Link Master

OD

on-request data

PD

process data

PL

physical layer

PLC

programmable logic controller

SDCI

single-drop digital communication interface

SIO

standard input output (digital switching mode)

SM

system management

SMI

standardized Master interface

UART

universal asynchronous receiver transmitter

WURQ
wake-up request pulse