What is IO-Link?
IO-Link (IEC61131-9) is an open-standard serial communication protocol that allows for the bi-directional exchange of data from sensors and devices that support it and are connected to a master. The IO-Link master can transmit this data over various networks, fieldbuses or backplane buses, making the data accessible for immediate action or long-term analysis via an industrial information system (PLC, HMI, etc.). Each IO-Link sensor has an IODD (I/O Device Description) file that describes the device and its IO-Link capabilities.
It should be noted that IO-Link is not another fieldbus – but rather a point-to-point communication protocol between a compatible I/O system and a field device. Because IO-Link is an open standard, devices can be integrated into virtually any fieldbus or automation system.
Five advantages of IO-Link
There are many advantages of an IO-Link system, including standardised and reduced wiring, increased data availability, remote configuration and monitoring, simple device replacement, and advanced diagnostics.
Read the full article in DPA's October issue