minutes. If communication is not started then the door must be closed and opened again or the
control sent again.
3.7 SCADA System Protocols
The following SCADA system protocols are supported by the RCU.
1 DNP3 over Serial Port
2 DNP3 over IP – TCP Listener
3 DNP3 over IP – TCP Dual
4 DNP3 over UDP
5 IEC 60870-5-104
6 Others in future
It is important to understand that while each protocol is different, they all utilise the data in the RCU
database and map it into the SCADA protocol in a different way. The mapping and other details
needed to understand how to program the SCADA system master station are given in the relevant
Protocol Manual. The details of the RCU database are given in the relevant protocol manual.
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