6 IO-Link

IO-Link is an open standard protocol addressing the need for intelligent control of small devices such as sensors and actuators, allowing a seamless data flow from the sensor to the control level. This standard provides low-speed point-to-point serial communication between a device and a master that normally serves as a gateway to a field bus and PLC. The intelligent link established enables ease of communication for process data exchange, configuration, and diagnostics. Data rates range up to 230,4kbps with a minimum cycle time of 400μs. An IO-Link port can be used with all the benefits of IO-Link or an alternative in Fallback Mode as Digital I/O. The capabilities of a device are described in the IO Device Description (IODD). There is the possibility to exchange cyclic process-data, device parameters, and diagnostic data. The many advantages of an IO-Link system include standardized wiring, increased data availability, remote monitoring and configuration, simple replacement of devices, and advanced diagnostics.

Figure 6-1 IO-LINK Solution Using AM261x