Method for operating a server device in an installation in which the server device ascertains a respective current process value (A, B, C) at different transmission times for at least one process parameter of a process controlled by the installation and transmits the ascertained current process values (A, B, C) to multiple client devices of the installation , via a data network , for each or a subset of the at least one process parameter in each case, - the server device forms an intersection (VG1) from at least one process parameter that is to be transmitted to more than one of the client devices (S16'), - the server device combines the respective current process values (A, B, C) of the at least one process parameter of the intersection (VG1) into a single multitarget telegram at the different transmission times and transmits the multitarget telegram into the data network to a group address (GA1) (S20), - the server device receives from each client device a respective enquiry telegram that contains an indication of from which of the at least one process parameter the respective current process values (A, B, C) are to be transmitted to the client device (S12), - the server device forms the intersection (VG1) on the basis of the received enquiry telegrams, - the server device stipulates the group address (GA1) for the intersection (VG1) and communicates the group address (GA1) to those client devices whose enquiry telegram contains an indication of the at least one process parameter of the intersection (VG1) (S16), - the server device receives from each client device at least one respective transmission parameter value, prescribed by the client device , for a transmission parameter that controls a transmission behavior of the server device , - the server device selects the intersection (VG1) from the at least one process parameter, in order to form the intersection (VG1), such that the transmission parameter values of each process parameter of the intersection (VG1) satisfy a predetermined similarity criterion, characterized in that the transmission parameter value is the update rate of the process parameter. - the server device forms an intersection (VG1) from at least one process parameter that is to be transmitted to more than one of the client devices (S16'), - the server device combines the respective current process values (A, B, C) of the at least one process parameter of the intersection (VG1) into a single multitarget telegram at the different transmission times and transmits the multitarget telegram into the data network to a group address (GA1) (S20), - the server device receives from each client device a respective enquiry telegram that contains an indication of from which of the at least one process parameter the respective current process values (A, B, C) are to be transmitted to the client device (S12), - the server device forms the intersection (VG1) on the basis of the received enquiry telegrams, - the server device stipulates the group address (GA1) for the intersection (VG1) and communicates the group address (GA1) to those client devices whose enquiry telegram contains an indication of the at least one process parameter of the intersection (VG1) (S16), - the server device receives from each client device at least one respective transmission parameter value, prescribed by the client device , for a transmission parameter that controls a transmission behavior of the server device , - the server device selects the intersection (VG1) from the at least one process parameter, in order to form the intersection (VG1), such that the transmission parameter values of each process parameter of the intersection (VG1) satisfy a predetermined similarity criterion, characterized in that the transmission parameter value is the update rate of the process parameter. <EOS>