relates to current and voltage values only. The allowed scale factors, actually meaning
|max values| of per unit coded measurands, are 1.2 or 2.4. The IEDs support all five
interchangeable Class 2 measurand frames defined by the standard.
Table 6:
Interchangeable Class 2 measurand frames
Frame
number
ASDU
FUN
1)
INF
Num of data
Data in the Class 2 frame
1
3
0
144
1
IL2
2
3
0
145
2
IL2, U12
3
3
0
146
4
IL2, U12, P3, Q3
4
3
0
147
2
Io, Uo
5
9
0
148
9
IL1, IL2, IL3, UL1, UL2, UL3, P3,
Q3, f
1) FUN = 0 means that the Function type is coded as the Device function type which in turn is defined by
the setting parameter
DevFunType n.
3.3.5.2
Other Class 2 measurand frames
Class 2 frame 6
This frame is equal in all relays of this series. It contains pre-defined mappings to most
of the measurands present in the product series. In case the relay configuration does
not contain some of the measurands of Class 2 frame 6, then the corresponding values
are set as constant 0. Trailing 0 values are cut from the frame and the frame becomes
shorter. The default function type/information number definitions for frame 6 are
FUN = 10, INF = 236.
Class 2 frame 7
This frame may be selected, but it is currently empty. The default function type/
information number definitions for frame 7 are FUN = 10, INF= 237.
Table 7:
Function type (FUN) and Information number (INF) definitions for frames 6 and 7
Frame
number
ASDU
FUN
INF
Num of data
Data in Class 2 frame
6
9
10
236
21 (max)
IL1, IL2, IL3, Io, UL1, UL2, UL3,
U12, U23, U31, Uo, P, Q, Pf,
Freq, SeqCurrent [Pos,Neg,Zro],
SeqVoltage [Pos,Neg,Zro]
7
9
10
237
0
-
User-definable Class 2 frame 0
As a third option, an own private Class 2 frame can freely be composed using
PCM600. The function type and information number can also be configured for this
user-definable Class 2 frame through the setting parameters
UsrFType n
and
UsrInfNo n
via
Configuration/Communication/IEC 60870-5-103/I3C0n
. Default
values are FUN = 10, INF = 230.
1MRS757647 C
Section 3
Vendor-specific implementation
620 series
19
Communication Protocol Manual
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