Redundancy control system of sand transport test stand based on PLC
JIANG Shuang1,2, NI Fusheng1,2, TENG Jundi1,2, DAI Wei1,2
(1.Engineering Research Center of Dredging Technology (MOE), Hohai University, Changzhou 213022, China; 2.College of Mechanical and Electrical Engineering, Hohai University, Changzhou 213022, China)
 

Abstract: Aiming at the problem of lower reliability of a sand transport experiment, the hard redundancy technique was investigated. Based on SIEMENS PLC 400H, respectively in the CPU, communication network and the host computer, the control system of a sand transport test stand with redundancy and fault safety function was established. Meanwhile，the control and parameters acquisition of 315kw inverter of SIEMENS MIDIMASTER series were realized through USS protocol and YLink module, then the interference of high power inverter was reduced and the acquisition parameters were enriched. The results indicate that the faulttolerance performance of the redundancy control system is very high, and the control failure which is caused by crash, communication interrupt, CPU fault and so on, can be effectively avoided. So the control reliability of the test stand is improved greatly.
Key words: sand transport; PLC; hard redundancy; USS; dredging