ABB Relion 670 series - Page 1009

15.16.3 Function block
GUID-EB28F45B-B1D0-452F-98B4-F96D7FA34069 v1
INTCOMP
INPUT
REF
INEQUAL
INHIGH
INLOW
IEC15000052-1-en.vsdx
IEC15000052 V1 EN-US
15.16.4 Operation principle
GUID-E9C1B863-ACA7-45C0-91F1-A51FE38755FE v1
The comparison can be done in two ways,
• Between 2 inputs, INPUT and REF
• Between INPUT and the value set by the user
SetValue .
The selection of reference value for comparison can be done through setting
RefSource . If
RefSource is selected as REF then the reference value for comparison is taken from second input
signal (REF). If RefSource is selected as SetValue then the reference value for comparison is taken
from setting ( SetValue ).
The comparison can be done either between absolute values or signed values and it depends on
the setting
EnaAbs . If EnaAbs is selected as Absolute then both input and reference value is
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 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
ABS
INPUT
REF
INHIGH
INEQUAL
INLOW
T
F
ABS
EnaAbs
RefSource
SetValue
T
F
T
F
a > b
a
b
a < b
a
b
a = b
b
a
IEC15000129-2-en.vsdx
IEC15000129 V2 EN-US
Figure 526: Function logic diagram for INTCOMP
1MRK 502 066-UUS B Section 15
Logic
1003
Technical manual