For configuring slave devices in a communication system comprising a master device (MD) and slave devices (SD), wherein the master device and the slave devices are connected in chain via a commission line (CL) and in parallel via a field bus line (FBL), wherein each slave device is indexed by an index greater than or equal to 1, the slave device of index 1 being connected to the master device, wherein, to enroll the slave device of index k, k being equal to or greater than 1, the master device is able to:
send (2), in broadcast via the field bus line (FBL), an address configuration frame containing instructions for address configuration with a defined address (Add_k) of index k for the slave device of index k,
send (S3), in broadcast via the field bus line (FBL), a request for device information, the request containing the defined address (Add_k),
send (S4), in broadcast via the field bus line (FBL) after having received a reply containing device information and the defined address (Add_k), a command for sending a commissioning signal via the commission line (CL) to the slave device of index k+1, the command containing the defined address (Add_k),
store (S5) the received device information in an information table, the device information containing an identifier of the slave device of index k and a type of the slave device of index k, wherein the slave devices have a common default address before being enrolled and only a slave device of index k, which has the common default address and detects a commissioning signal on the commission line (CL), accepts the address configuration frame to change the common default address of the slave device of index k to the defined address.