ABB 620 Series Manual page 22

Section 3
Vendor-specific implementation
16
The None mode does not include any scaling operations, and therefore the polled DNP3
value is the integer part of the IEC 61850 source value. The integer analog inputs, such as,
the counter value and the multiple-state status), are normally not scaled.
In the Multiplicative mode, the polled DNP3 value is a scaled source value plus an
optional offset.
DNP 3 _ Value ( Source Value Multiplication Coefficient _
=
GUID-AFE8E780-88C7-4AD1-A7DA-88532B7FC928 V2 EN
The two coefficients, Multiplication_Coefficient and Offset, can be configured in the
Communication Management tool in PCM600 as "destMaxVal" and "destMinVal"
respectively.
DNP 3 _ Value ( Source Value _
=
GUID-81FE8360-D9AA-46CA-A1B2-DD7C65436463 V2 EN
Only integer values are supported in DNP3 analog inputs. To keep the two decimals of a
floating point analog input (for example current, voltage and power), the Multiplicative
mode is selected, and the default multiplication factor "destMaxVal" set to 100 and offset
"destMinVal" is set to 0.
Equation 3 shows the calculation of the polled DNP3 value for the Divisor mode.
Source Value

DNP 3 _ Value
=

Division_Coefficient

GUID-53CD105D-25DB-4038-BF5D-CC56D90E3F81 V2 EN
The two coefficients, Division_Coefficient and Offset, can be configured in the
Communication Management tool as "destMaxVal" and "destMinVal" respectively.
Source Value _

DNP 3 _ Value
=

destMaxVal

GUID-E8AA40C6-9FC8-4FA5-AC83-400023CFFBDC V2 EN
For the Ratio mode, the polled DNP3 value is linearly projected from one range (from
Min_source to Max_source) to another (from Min_destination to Max_destination). The
four coefficients can be configured in the Communication Management tool as
"sourceMinVal", "sourceMaxVal", "destMinVal" and "destMaxVal" respectively.


DNP 3 _ Value Source Value sourceMinVal _
(
=

 
GUID-56561D72-0A1A-44EF-826F-414346F6CFC5 V2 EN
_
×
destMaxVal ) destMinVal
× +
_

Offset
 +


destMinVal
 +

destMaxVal

)
− ×

sourceMaxVal sourceMinVal

1MAC459571-IB C
) Offse t t
+
(Equation 1)
(Equation 2)
(Equation 3)
(Equation 4)
destMinV a a l


−

destMinVal
+


−
 

(Equation 5)
620 series ANSI
Communication Protocol Manual