In order to operate our IO-Link sensor-actuator hubs without an external power supply with outputs on our IO-Link masters, it may be necessary to provide an actuator supply via pin 2.

These instructions are intended to explain the configuration for our IO-Link masters with Profinet up to GSDML <= 2.3x.
For the newer GSDML from version 2.4x and following, please use the corresponding document.

IO-Link sensor hub is connected to port and SF error is present on the IO-Link master

Diagnostics for the IO-Link port is available via channel diagnostics

Configuration in the TIA Portal using the GSDML

The "Outputs pin 2" module must be dragged from the hardware catalog to a free slot in the hardware configuration and then assigned to an output address.





In addition, the respective port direction for the individual pins/ports must be set in the module parameters of the head module (slot 1).
In our case, port 0, pin 2.

The corresponding ports can now be switched on via the "Outputs Pin2" byte.


To do this, either activate the corresponding output byte as required in the running program or activate it as a test via the watch table.

Pin 2 should be switched immediately (orange LED on the IO-Link master port / Pin2) and the diagnostic message should disappear.

Configuration in the Simatic Manager using the GSDML

The "Outputs pin 2" module must be dragged from the hardware catalog to a free slot in the hardware configuration and then assigned to an output address.

In addition, the respective port direction for the individual pins/ports must be set in the module parameters of the head module (slot 1).
In our case, port 0, pin 2.

The corresponding ports can now be switched on via the "Outputs Pin2" byte.


To do this, either activate the corresponding output byte as required in the running program or activate it as a test via the watch table.

Pin 2 should be switched immediately (orange LED on the IO-Link master port / Pin2) and the diagnostic message should disappear.

In this example, port 0 / pin 2 should now be active, the SF LED should be off and the port 0 LED for pin 2 should light up

Have you switched "Pin 2" and the diagnosis remains active?

• Is the actuator voltage present at the master?
• Was a 4-wire cable used between the master and device?
• Can a cable break be ruled out?