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

1MRS755310
Address Signal name
673 Unread records left
674 Time stamp of the event, date
675 Time stamp of the event, date and time
676 Time stamp of the event, time
677 Time stamp of the event, time
678 Modbus DI point or informative event (SPA channel)
DI event
*
Informative event
*
679 DI value or SPA event code
DI event
*
Informative event
*
a)
Readable and writeable register.
5.1.16.
Feeder Protection Relay
Technical Reference Manual
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 5.1.15.1.-16 Real-time clock structure
Address
721
722
723
724
725
726
727

DNP 3.0 remote communication protocol

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 Data Link is to be used with a
transport pseudo-layer. As a minimum, the transport pseudo-layer implements
message assembly and disassembly services.
Range
0...99
0...999
0/1
0
1
0/1
0...63
Description
Year
Month
Day
Hour
Minute
Second
Hundredth of a second
REF 610 REF 610
Comment
2 bytes: YY.MM
2 bytes: DD.HH
2 bytes: MM.SS
0...999 ms
When MSB = 0, bits 14...0
indicate the DI point.
When MSB = 1, bits 14...0
indicate the SPA channel.
In case of a DI event, the
register will contain the DI
value.
In case of an informative event,
the register will contain the
SPA event code.
Range
0...99
1...12
1...31
0...23
0...59
0...59
0...99
99