Protocol Parameters; Storing Dnp 3.0 Parameters; Dnp 3.0 Point List - ABB REF610 Technical Reference Manual

1MRS755535
5.1.16.1.
5.1.16.2.
Feeder Protection Relay
Technical Reference Manual - ANSI Version
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.

Protocol parameters

The DNP parameters can all be adjusted using Relay Setting Tool. For the DNP
parameters, refer to Table 5.1.17.-14.

Storing DNP 3.0 parameters

All DNP parameters are stored on the external DNP 3.0 module. After
parameterization with Relay Setting Tool, REF610 must be switched to the rear
communication mode for at least 10 seconds in order for the DNP parameters to be
replicated and stored onto the DNP module. However, this is necessary only if the
DNP parameters have been altered.

DNP 3.0 point list

The DNP data points (binary, analog and counters) of the relay, presented in
Table 5.1.16.2.-1...Table 5.1.16.2.-3, are all in use as default.
The default class settings of the DNP points within the different event object groups
are:
Binary inputs change events: class 1
*
Analog inputs change events: class 2
*
Counter change events: class 3
*
All static data points belong to class 0.
Unsolicited reporting is enabled for all event objects as default. However, the point-
specific enable/disable parameters are meaningless unless unsolicited reporting has
been enabled with SPA parameter 503V24.
The pointers to the scaling factors for analog objects are all 0 as default.
Consequently, the DNP and Modbus analog values of the relay are identical as
default.
All DNP process points can be edited using Relay Setting Tool. Editing features
include:
Re-organizing, adding and removing DNP points
*
Assigning event classes to specific DNP points
*
DNP point-specific enabling/disabling of unsolicited reporting
*
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