The invention relates to an automation system comprising at least one device (2a, 2b, 2c) that detects measured values and is connected to a automated process (1), at least one field device (5, 6) which is connected to the at least one device (2a, 2b, 2c) detecting measured values, and a master computer (7) that is connected to the at least one field device (5, 6). In order to simplify the designof such an automation system as much as possible, the at least one device (2a, 2b, 2c) detecting measured values, the at least one field device (5, 6), and the master computer (7) are connected to a common data transmission network (3) which is equipped for transmitting digital measured data from the at least device (2a, 2b, 2c) detecting measured values to the at least one field device (5, 6) according to a first communication protocol and transmitting digital control data between the at least one field device (5, 6) and the master computer (7) according to a second communication protocol.