Distributed diagnostic and control of cutting processes based on IEC 61499

IEC61499 standard as an event driven supplement to the IEC61131-3 standard offers new challenges in overcoming the disadvantages of currently used industrial control systems in respect to the algorithm complexity and fixed control structure and supports the achievement of fast, easy and robust reconfiguration. The reconfigurable control systems are able to rearrange dynamically the system elements in order to accommodate the failure events and new requirements. In respect to this the successfully solving of diagnostics tasks is a very important step to the reconfigurability. This paper proposes a systematic approach for extending the development of distributed control systems with integrated parts for distributed fault diagnosis in order to ensure an effective and timely reconfiguration process and maintenance planning. The approach is based on transformation of some basic function blocks of the IEC61131 based PLCopen library for motion control into IEC61499 based Function Blocks (FB). The approach is illustrated with a case study for distributed motion control and diagnostics of drilling operations.