Report-by-exception protocols ensure your SCADA won't miss a beat

Keith Donaldson, Trihedral’s Head of UK Business Development, walks us through some common scenarios where polling I/O can result in lost data and missed alarms. The solution is adopting a report-by-exception protocol like DNP3 or IEC60870-5-104 that uses time-stamped-data to ensure the HMI records every change of state for I/O and alarms. www.vtscada.com/