ABB RELION 670 Series Technical Manual page 1009

1MRK 502 066-UUS B
15.16.3 Function block
INPUT
REF
IEC15000052 V1 EN-US
15.16.4 Operation principle
The comparison can be done in two ways,
• Between 2 inputs, INPUT and REF
• Between INPUT and the value set by the user
The selection of reference value for comparison can be done through setting
RefSource is selected as REF then the reference value for comparison is taken from second input
signal (REF). If
from setting (
The comparison can be done either between absolute values or signed values and it depends on
the setting
converted into absolute values and comparison is done. If
comparison is done without any conversion.
The function has three state outputs high, low and equal to condition. It will check the following
condition and give corresponding outputs.
• If the input is above the reference value then INHIGH will set
• If the input is below the reference value then INLOW will set
• If the input is equal to reference value then INEQUAL will set
EnaAbs
INPUT
RefSource
REF
SetValue
IEC15000129 V2 EN-US
Figure 526: Function logic diagram for INTCOMP
Technical manual
INTCOMP
INEQUAL
INHIGH
INLOW
IEC15000052-1-en.vsdx
RefSource is selected as SetValue then the reference value for comparison is taken
SetValue ).
EnaAbs . If EnaAbs is selected as Absolute then both input and reference value is
ABS
T
F
T
F
SetValue .
EnaAbs is selected as Signed then the
ABS T
F
GUID-EB28F45B-B1D0-452F-98B4-F96D7FA34069 v1
GUID-E9C1B863-ACA7-45C0-91F1-A51FE38755FE v1
RefSource . If
a
INHIGH
a > b
b
a
INEQUAL
a = b
b
a INLOW
a < b
b
IEC15000129-2-en.vsdx
Section 15
Logic
1003