Analog Data Scaling - ABB Relion 615 Series Protocol Manual

1MRS756709 D
3.2.3.1
615 series
Communication Protocol Manual
Table 6: Analog inputs
Description
Static (steady-state) object number
Change event object number
Static variation reported when variation 0
requested (default setting)
Change event variation reported when variation
0 requested (default setting)
Table 7: Default Class assignment for analog input data
Point index Name/description
See the point list manual.

Analog data scaling

The four scaling options associated with analog input data reporting are None,
Ratio, Multiplicative and Divisor. The selection None means that no scaling is
performed on the source IEC 61850 value. The value is reported as such to DNP3.
Ratio, multiplicative and divisor scaling methods
The PCM600 tool contains four value arguments related to the scaling methods:
sourceMinVal, sourceMaxVal, destMinVal and destMaxVal. The use of these
arguments differs depending on the scaling method.
The ratio, multiplicative and divisor scaling methods use the first two arguments,
souceMinVal and sourceMaxVal, to define the source value range inside which the
object is to be used. The complete value range of the object is usually wanted even
though the user could freely define the source range.
Arguments three and four, destMinVal and destMaxVal, define the destination
value range. In ratio scaling, arguments destMinVal and destMaxVal define the
corresponding range of the scaled, reported DNP3 value.
DNPvalue=
(sourceValue - sourceMinVal)
GUID-9F985816-2268-412A-AE24-ED90EAC44AD7 V2 EN
In multiplicative scaling, argument four destMaxVal becomes a scale constant and
argument three destMinVal becomes an offset.
(
DNPvalue = sourceValue destMaxVal
GUID-4CB1987F-BDD8-48A2-9389-20B0B2EB271F V1 EN
Vendor-specific implementation
Values
30
32
4 (16-bit analog input w/o flag)
2 (16-bit analog change event w/o time)
Default deadband
Configurable IED setting

(destMaxVal-destMinV V al)


(sourceMaxVal - sourceMinVal)
)
× + destMinVal
Section 3
Default change event
assigned class (1, 2, 3 or
none)
2

 +destMinVal

(Equation 1)
(Equation 2)
15