this would be if one of the electrical devices 6 would have to transmit exclusively data 19 the master computer 18 could generate the time stamp 20 itself while the electronic device 6 itself does not require any time stamp the generation of time stamp 20 for the data 19 transmitted from the electronic device 6 on the master computer 18 will be described in detail in the following in order to generate the time stamp 20 itself the master computer 18 requires the local time 21 of the fieldbus connection module 4 of the electronic device 6 transmitting the data 19 which is called the transmitter local time 21 in the following to this end a relative transmission time generator 22 such as for example a counter is used in the present embodiment in the fieldbus connection module 4 of the electronic device 6 transmitting the data 19 this generator emits an elapsed time duration 23 called the transmitter time duration 23 in the following starting from a time reference basis still to be described which transmitter time duration is transmitted to the master computer 18 if the fieldbus connection module 4 of the electronic device 6 transmitting the data 19 transmits data 19 to the master computer 18 then it also sends together with this data 19 the actual transmitter time duration 23 of the transmission time generator 22 the master computer 18 adds the received transmitter time duration 23 and the reference time 24 still to be described in an adding component 25 obtaining in this manner the above named transmitter local time 21 the master computer 18 can then generate the time stamp 20 in a time stamp.