Detection system and detection method

The invention relates to a detection system and detection method for the detection and tracking of optical codes on objects which are transported along a monitored zone, is having a plurality of optoelectronic sensors to read in the codes and to generate corresponding reading data, and having at least two data buses, which each associated with its own bus control unit wherein each of the plurality of sensors is connected both to the one and to the other of the two data buses and said one of the two data buses with the associated bus control unit on the one hand and the other data bus with the associated bus control unit are on the other hand is divided into a primary branch and a secondary branch, which is subordinate to the primary leg.