Research and development of industrial real-time Ethernet performance testing system used for CNC system

摘要

Nowadays, the using of real-time Ethernet (RTE) in CNC system becomes a main trend because of its low cost and high performance. In order to guarantee the performance of CNC systems which use RTE, the characteristics of RTEs must be tested according to the description in IEC61784-2 standard. In this paper, the performance indicators (PIs) described in IEC61784-2 are analyzed and the testing approaches for some selected PIs which are closely related to CNC system performance are researched. According to these PIs, the hardware and software of RTE performance testing system are implemented. With this system, the evaluation of RTEs which are going to be used in CNC system can be more general purpose to fit to different RTE communication profiles (CPs) and the accuracy of sampling can be less than 10 ns. Also, with the designed flexible software structure, analysis software can adapt to different kinds of RTE CP testing. Testing scenario and a case study for the test of EtherCAT are also given to show the feasibility of the designed testing system. With the testing system designed in this paper, the evaluation for RTEs which will be used in CNC system can be done in a simple way to guarantee the CNC system performance.