Practical methods, recommendations, rules and techniques used in creating APCS software based on an object-oriented approach (OOP) are presented. Brief information about control systems is given, an analysis of the subject area is given, its domains and basic concepts are defined, implemented as objects| their interaction is considered in solving the main tasks of controlling technological equipment. Descriptions of the corresponding classes are given and general questions of the software configuration of the automation module are considered. The appendix provides examples of the implementation of the designed classes in the C++ language from the software of the solenoid valve individual control module.For specialists involved in the development of APCS software for various purposes. It may be useful for students of relevant specialties as a methodological material.