Comparator For Real Inputs Realcomp; Identification; Functionality; Function Block - Hitachi Relion 650 Series Technical Manual

Section 11
Logic
• Between 2 inputs, INPUT and REF
• Between INPUT and the value set by the user SetValue.
The selection of reference value for comparison is done through setting RefSource. If RefSource is
selected as "Input REF" then the reference value for comparison is taken from second input signal
(REF). If RefSource is selected as "Set Value" then the reference value for comparison is taken from
setting (SetValue).
The comparison can be done either between absolute values or signed values, which is governed by
on the setting EnaAbs. If EnaAbs is selected as "Absolute" then both input and reference values are
converted into absolute values and comparison is done. If EnaAbs is selected as "Signed" then the
comparison is done without any conversion.
The function has three binary outputs representing the result of the comparison:
• If the input is above the reference value then INHIGH is set HIGH
• If the input is below the reference value then INLOW is set HIGH
• If the input is equal to reference value then INEQUAL is set HIGH
11.10

Comparator for real inputs REALCOMP

11.10.1

Identification

Function description
Comparator for real inputs
11.10.2

Functionality

The function gives the possibility to monitor the level of real value signals in the system relative to
each other or to a fixed value. It is a basic arithmetic function that can be used for monitoring,
supervision, interlocking and other logics.
11.10.3

Function block

INPUT
REF
IEC15000053 V1 EN-US
11.10.4

Signals

Table 159: REALCOMP Input signals
Name
INPUT
REF
150
REALCOMP
INEQUAL
INHIGH
INLOW
IEC15000053-1-en.vsdx
Type
REAL
REAL
© 2021 Hitachi Energy. All rights reserved.
IEC 61850 IEC 60617
identification identification
REALCOMP
Default Description
0.000 Input value to be compared with reference value
0.000 Reference value to be compared with input value
1MRK 511 557-UEN Rev. A
GUID-0D68E846-5A15-4C2C-91A2-F81A74034E81 v1
ANSI/IEEE C37.2
device number
Real<=>
GUID-E17A88D7-D095-4F36-9CD5-64EBFD2A1DEA v1
GUID-8752DF2A-D131-4461-80C6-C52F9980D228 v1
PID-7248-INPUTSIGNALS v1
Technical Manual