Abstract
In this paper, we propose an approach to developing distributed control software within the process-oriented paradigm. This approach considers distributed system components as separate programs that exchange by I/O signals following the common synchronization signal. The I/O signals report about important system events to interested system components. The synchronization signal defines the moment when every system component reads its inputs. These signals are passed through physical wires. Our method is applied to control software specified in Reflex: a domain-specific extension of the C language developed as an alternative to IEC 61131-3 languages. As a process-oriented language, Reflex enables control software description in terms of interacting processes, event-driven operations, and operations with discrete time intervals. We illustrate the main features of our method with the distributed Reflex program for a bottle-filling system. We provide a distributed architecture and program code for this system.
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