System and method for historical data retrieval from opc ua historian without continuation points

Abstract

Various embodiments described herein relate to a method and system for data communication with OPC UA historian data source that lacks support for continuation points. The system comprises one or more processors and a memory enabling the processor to transmit a first request from an OPC UA client to at least two historian data sources to receive historical data at a first time frame and accordingly receive a first response from a first data source that lacks support for continuation point at a second time frame. Then the processor determines that the second end-time is different from the first end-time and accordingly transmits a second request from the OPC UA client to the first data source with a third time frame. The processor repeats transmission of additional requests to the first data source by incrementing end-time of new time frames to retrieve remaining historical data within the first time frame.