A method is used for generating a system protocol for control and/or monitoring equipment for one or more machines and/or processes. The equipment comprises a number of modules which can communicate with each other via a serial digital connection in accordance with said system protocol. A first memory location is fed with first data concerning a base protocol and is also supplied with second data concerning one or more additional protocols which indicate possible basic functions for the mutual relationship of the modules in the intercommunication. A second memory location receives third data concerning a base protocol and can also be supplied with fourth data concerning one or more additional protocols which indicate desired basic functions for the mutual relationship of the modules in the intercommunication. The system protocol is based on first, second, third and fourth data in said first and second memory locations.