ABB Relion 670 series, Communication Protocol Manual

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floating point) is in the range of a 32-bit signed integer value (max. 32-bit = 2 147 483
648).
IEC08000407.vsd
DNP3 AI scaling
DNP3 =
Float or
32 bit
Value
= angle
+ 32 bit
Do AI scaling in
’DNP3
for all AI types and variants
Get MinDestValue and
MaxDestValue for CMT AI scaling
Get MinSourceValue and
MaxSourceValue
from PST for all AIs
Calculate Scaling factor on base
of SourceValue and DestValue
and define Equation mode
Configure
’Configuration Table’
in CMT for all AI values
All
DNP3 clients
done
Scale Ratio to degree
and resolution
for all angle AI values
Select next
DNP3 client
END
DNP3-Register =
16, 12 or 8 bit
YES
NO
NO
A
IEC08000407 V2 EN-US
Figure 4: CMT: Configuration Flowchart
1MRK 511 391-UUS C
Section 3
Vendor-specific implementation
670 series 2.2 ANSI 21
Communication protocol manual