PLCs, which are a substitute for the relay logic that was in use decades ago, deal mainly with IO related ON/OFF information and leave the data processing up to a PC (SCADA). The data is not integrated and does not have a logical name (example: X123), which can be confusing to users because the SCADA software just acquires and sets the data through the PLC's inner register. In the STARDOM system, the controller (FCN or FCJ) excels at dealing with both analog and ON/OFF information. This controller sends data to a PC (running STARDOM's VDS SCADA software) along with embedded data processing functions. Unlike a PLC+PC, all data is integrated within function blocks and these have a user defined logical name.