Dnp 3.0 Remote Communication Protocol - ABB REU 610 Technical Reference Manual

1MRS755972
Table footnotes from previous page
a)
Readable and writeable register.
5.1.16.
5.1.16.1.
Voltage Relay
Technical Reference Manual - ANSI Version
Table 5.1.15.2.-16Modbus DI-point event
Address Name
678 0 Modbus DI-point
679 Modbus DI value
Table 5.1.15.2.-17Informative event
Address Name
678 1 SPA channel
679 SPA event
Structure 4
The relay's real-time clock is stored in this structure. It can be updated by
presetting the whole register structure in one Modbus transaction.
Table 5.1.15.2.-18Real-time clock structure
Address
721
722
723
724
725
726
727

DNP 3.0 remote communication protocol

Protocol overview
The DNP 3.0 protocol was developed by Harris Control based on the early
versions of the IEC 60870-5 standard telecontrol protocol specifications.
Today, the DNP protocol specifications are controlled by the DNP Users
Group.
The DNP protocol supports the ISO OSI (Open System Interconnection)
based model, which only specifies physical, data link and application layers.
This reduced protocol stack is referred to as Enhanced Performance
Architecture (EPA). To support advanced RTU functions and messages larger
than the maximum frame length as defined in the IEC 60870-1, the DNP 3.0
Range
1...99
0...1
Range
0...3
0...63
Description
Year
Month
Day
Hour
Minute
Second
Hundredth of a second
REU 610
Comment
MSB = 0
Comment
MSB = 1
Range
0...99
1...12
1...31
0...23
0...59
0...59
0...99
75