Specifications

sigmadue - IEC 61131-3 Function Block Library
18
1-3-11 COMPARATOR
FB Prototype COMPARATOR
Input parameters
Output parameters
Description This function block compares the input value with a reference value, and provides
a digital output indication.
Default values
Label Type Description
AI REAL Input value
REF REAL Reference value
HYST REAL Hysteresis (symmetrical respect to reference)
Label Type Description
HIGH BOOL
Digital output for AI > REF + HYST
EQUAL BOOL
Digital output for
REF – HYST ⬉ AI ⬉ REF + HYST
LOW BOOL Digital output for AI < REF - HYST
AI
REF
HYST
REAL
REAL
REAL
¡
¡
¡
BOOL
BOOL
BOOL
HIGH
EQUAL
LOW
¡
¡
¡
Input Default values
AI 0.0
REF 0.0
HYST 0.1
Output Default values
HIGH
FALSE
EQUAL FALSE
LOW FALSE