DESIGN AND IMPLEMENTATION OF HIGH SPEED DATA ACQUISITION SYSTEM FOR VIBRATION SIGNAL BASED ON PLC

YANG Dai-hua, LEI Ju-yang

Abstract: During the actual production process, the upper computer is required to record the process data of high-speed change. For general network communication mode, the maximum refresh rate that WinCC can provide is 250ms, but WinCC can realize highspeed data collection of s7-400plc with the method of RawData archive data link. The acquisition of vibration signal and the acquisition of general analogue signal have some similarities, but there are more differences. For fault diagnosis of vibration signal is the demand of high speed data sampling and WinCC cannot satisfy high refresh rate of rapid real-time data acquisition and display problems, put forward and discussed by using S7-400 PLC in SFB37 system function block (AR_Send) to implement the WinCC the principle and method of high-speed data acquisition. Finally, the simulation results of vibration signal are obtained

Keywords: RawData; High-speed data collection; WinCC; S7-400 PLC

DOI: https://doi.org/10.15623/ijret.2018.0704017