In a method of sequence control for controlling a production installation containing one or more functional units independent of brand and process of product to be produced, there are provided unit sequence programs for each of the functional unit. A series of the steps from start process to stop process and installed for every minimum function unit which are independent of brand and process of product to be produced. Sequence control is performed by enabling and disabling the selected unit sequences automatically or manually, so that the functional unit is controlled by the parameter stored in the unit sequence program.
