Double-click on the header module to open its properties. 
Click on the "Parameter" tab to open a menu selection for defining the  
port functions and diagnostic functions. 
 
 
Note 
IO-Link configuration: 
For modules with an firmware version 2.3 or higher, the configuration of pin 4 as 
IO-Link port is not necessary anymore. The port is automatically configured to 
IO-Link, when an IO-Link process data module is used in the hardware 
configuration. Therefore the option to set pin 4 to IO-Link is removed in the new 
GSDML files. 
If the connected IO-Link device makes outputs available, pin 2 must be configured 
to output on the corresponding port. 
Standard input and output: 
For each port, the function (N.C., N.O., diagnostic input (pin 2)) can be arbitrarily 
selected for each port at pin 2 and pin 4.