CUI Yiqun, WANG Chunli, HUANG Ce, et al. Research on information circulation time in Profibus-DPV1[J]. Thermal power generation, 2013, 42(10): 62-64.DOI:
On the basis of analyzing Profibus protocol of DPV1 and DPV0
the DPV0 was upgraded to the DPV1.By investigation on the DPV1 function and master slave service type
eight kinds of DPV1 time parameters affecting the information cycle time were calculated
and the calculation method for information cycle time was studied.The practical application results indicated that
the longest data update time in DPV1 protocol was three times larger than that in DPV0 protocol.The more the slave stations that the user program accessed the DPV1 via DPV1 protocol at the same moment
the slower the data communication rate.Therefore
the user program should conduct non cycle data access to all equipments in bus at different times as much as possible.