WAGO-I/O-SYSTEM 750
The IO-Link Technology
15
750-657 IO-Link Master
Manual
Version 1.0.2, valid from FW/HW-Version 02/01
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The IO-Link Technology
IO-Link defines a communication standard (acc. IEC 61131-9) for connecting
both current digital inputs/outputs and intelligent IO-Link devices to the control
level. IO-Link devices describe sensors and actuators of the field level that have
IO-Link functionality.
The IO-Link technology is predominantly used in the industrial sector of
manufacturing automation. With IO-Link, configuration, diagnostics and
maintenance from the control are possible to the lowest field level in addition to
process data communication. For example, sensor failures can be diagnosed and
localize in the control directly.
With central parameter data storage in the IO-Link master and the possibility of
project development, attached devices can be simply replaced and configurations
copied.
Communication occurs via serial point-to-point links in standard 3-wire
technology. Both data and diagnostic information as well as power supply are
carried over the serial IO-Link interface simultaneously.
IO-Link
IO-Link device
IO-Link master
1
4
2
3
DI/DO
C/Q
L+
L-
C/Q
4.8 / 38.4 / 230 kbit/s
Figure 1: 3-wire connection technology (based on Physics 2 of the IO-Link-specification 1.0.0)
Configuration of IO-Link devices is based on standardized description files "IO
Device Description" (IODD), which are provided by the device manufacturers and
interpreted in the respective configuration software. Thus, IO-Link devices can be
integrated in current automation systems and network structures independent of
the bus systems used.
At the time of creating this documentation, the IO-Link specification
v1.1_Nov2010 is being assumed into the IEC standard and will be standardized as
IEC 61131-9 by "IEC international". The "IO-Link" designation be continued as
"Single-drop digital communication interface for small sensors and actuators"
(SDCI).
Additional Information
More information about IO-Link is.
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