Baumer IO-Link RR30 Manuale di istruzioni - Pagina 5

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SIO / DI Mode

2.1

Each port of the IO-Link master can be operated either in SIO mode (standard in-out mode: according to the

latest specification DI mode for sensors and DQ mode for actuators) or in IO-Link mode and thus process the

information of all sensors. In SIO mode, the binary switching output (NPN, PNP or push-pull) of the sensor is

used. In IO-Link mode, the output of the sensor (pin 4) is used as a bidirectional, digital interface to exchange

measurement and diagnostic information.

2.2

The IO link communication mode is initiated by the master (PLC) with a standardized command sequence,

this sequence is called "wake-up". After successful completion of the wake-up sequence the IO link

communication starts.

Data is the most important basis for process and product optimization. With the help of IO-Link, valuable

additional data can be made accessible. Sensor and Master can exchange two different types of data (cyclic

and acyclic data).

More information can also be found here.

2.2.1

Transmitted in real time. They are used for process control in the automation system. These can also be

transferred to other IT systems via IO-Link.

2.2.2

Through this data stream, sensors (IO devices) can be parameterized. Additionally this data stream also

allows to transmit data for identification and analyzation. The figure below shows the different types of data

and their value for the application.

Figure 2 Different IO Link data streams

2.3

Each IO-Link Device has a device description file, the so-called IODD (IO Device Description). This contains

data about the manufacturer, article number, functionality, software version etc., which can be easily read out

and further processed by the automation system. Each device, i.e. each sensor, can be uniquely identified

both via the IODD and via an internal device ID. The identification data of the sensor also includes device or

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