To achieve increased stability in industrial control systems (ICS) and reduction in maintenance cost, the asset management application in addition to control application is evaluated important. In that situation, device data must be integrated to upper layer in a standardized way under various field networks and field devices environment. FDT (IEC62453) is a standard technology which allows integration of devices and networks to engineering tools, e.g. for ICS asset management systems. FDT can integrate device data to upper layer in a standardized way regardless of process automation or factory automation. Recently FDT technology is upgraded to FDT3.0 (FDT version 3) which enables the FDT IIoT Server™ (FITS™) concept. This paper focuses the device data utilization use case analysis for FDT technology in ICS. We show concrete image of use cases and several benefits obtained from FDT technology in which FDT3.0 realizes attractive role in IIoT for device integration in ICS.