The present invention relates to a method for programming a safety-oriented programmable logic controller (10) which is connectable to a device (3) which performs a device-integrated safety function and may be activated using predetermined, first data (100), in which case the programmable logic controller (10) is equipped with at least one first program part (1, 1′) for providing second data (200) for activating the device-integrated safety function, and with a second program part (2) for automatically converting the second data (200) into the first data (100); the present invention also relates to a related router function block (2) for a PLC (10).