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Technical Reference Manual, General
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The REX 521 applications, whose modularization is based on trip stages, have been
mapped into the IEC 60870-5-103 information numbers according to the following
model:
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The user cannot effect the event flow from the IEC 60870-5-103 protocol by
adjusting the event masks of the REX 521 applications.
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The measurement (analogue) values are transported to the control system as a
response to a class 2 request command. The class 2 data is always cyclically updated
(COT=2). Refer to Table 10.5.-3 on page 61 for measurement data.
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The IEC 60870-5-103 standard defines the measurands to be transmitted as either
Meas I (typeId 3) or Meas II (typeId 9) ASDU frames. According to the standard,
the Meas I ASDU can have four different profiles and Meas II has one profile. These
five profiles are supported in REX 521. In addition, there are six more private class
2 ASDU frames defined. The user can choose which one of these eleven measurand
sets to use. The measurand set number (1...11) can be adjusted via the Frame type
parameter.
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The IEC 60870-5-103 standard defines the scale (max. range) of the measurements
to be either 1.2 or 2.4 times the rated value for the measurement. The selection
between the 1.2 scaling or the 2.4 scaling can be done via the Scale factor
parameter.
In order that the analogue (measurement) data becomes available on the
IEC 60870-5-103 interface, the measurement applications must have the
measurement threshold with a proper threshold value selected.
Standard
Standard
Private
Info No
85
Breaker failure
CBFP
CBFP
CBFP
Stage Low
>
Stage High
>>
Stage Inst
>>>
Start
Start
Start
Trip
Trip
Trip
Info No
General start
Trip >
Trip >>
Start Stage >>
Start Stage >>>
Trip >>>
84*
90
91
94*
96*
98
*) Interrogable
ProtMapPrin
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