V01.00 | 2020/11
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Software-Supported IO-Link Parameterization
The ports of the IO-Link master can be configured in IO-Link mode (IOL) or in Standard IO mode
(SIO).
If a port is set to SIO mode, the IO-Link master at this port behaves like a normal digital input.
The connected IO-Link device transfers its conventional switching output to the IO-Link master
– no communication takes place between the device and the IO-Link master.
If the port is configured in IOL mode, the IO-Link master tries to wake the connected IO-Link
device via the "Wake-up Request". If the master receives a response from the IO-Link device,
both devices start to communicate with each other. The communication parameters are ex-
changed first of all; the cyclic data exchange of the process data (process data objects) then
starts.
When IO-Link communication (IOL mode) is active, both a cyclic and acyclic communication
service is available.
There are two ways of setting the parameters via IO-Link:
n
via on-request data objects (e.g. close to the PLC via IO-Link function block)
n
via tool-based engineering via FDT/DTM (e.g. PACTware with the use of DTM or the IODD)
Device parameters (on-request data objects)
Device parameters are exchanged acyclically and on request of the IO-Link master. The IO-Link
master always sends a request to the device first, then the device responds. This applies when
the data is written into the device and also when read from the device. On-request data objects
(ORDO) enable parameter values to be written into the device (write) or device states to be
read from the device (read).
IO-Link configuration in PROFINET
Using SIDI (Simple IO-Link Device Integration), IO-Link devices can be configured in PROFINET
applications directly in the programming environment (e.g. TIA Portal). The Turck IO-Link
devices are integrated in the GSDML file of the IO-Link masters in the TBEN, TBPN and FEN20
product series and can be configured in the programming environment as submodules of a
modular I/O system. During this process, the user has access to all device properties and para-
meters.
