ABSTRACT
Nowadays, it is impossible to imagine modern motive power rolling stock without complex microprocessor control and management systems. There are many and varied tasks for such systems. All microprocessor-based systems are very similar in structure. The rst level includes the system that is based on a central host computer connected to one or more auxiliary computers, depending on the number of tasks assigned to the system. Programs and data are stored in the memory modules. All these programs are executed in a predetermined sequence. At the second level, there are commonly analogue and digital interfaces which provide connection to analogue and digital peripherals, and modulator subsystems which control the power semiconductor converters. The third level includes low-level signals that are needed to connect the system with the higher layers, that is, external monitoring and diagnostic systems that are outside of the locomotive.
