Difference between and RTU and PLC with DNP3 Protocol

RTU is focussed on responding to supervisory control sequences from multiple masters / slaves where comms can fail at any time.

PLC has no inbuilt resilience or fall back plan for comms failures or recovery

Polling protocols are expected to return information  in sequence with the computation cycle

DNP3 Protocol

•One of the most common SCADA protocols in use today

─Supported by DNP3 User Group

•Full featured providing

─Buffered Data (SOE)

─Time Stamps

─Quality Processing

─Rich data types

•Compatible with SCD5200, SCD2100, SCD2200, most 3rd party devices

─Driver is integrated, full featured, supports triple redundancy and full SOE