Specifications

Chapter 1 - AsconACLib

1-3-4 ALARM_DEVIATION MODULE

FB Prototype

ALARM_DEV

Input parameters

Output parameters

Description

This function block generates only independent DEVIATION high and low alarms.

Alarm description

Default values

Label Type Description

VALUE REAL Input value

REF REAL Reference value

DEV_HIGH REAL Deviation Alarm Max

HY_DHIGH REAL Hysteresis Deviation Alarm Max

DEV_LOW REAL Deviation Alarm Min

HY_DLOW REAL Hysteresis Deviation Alarm Min

Label Type Description

DEV_H BOOL Deviation High Alarm

DEV_L BOOL Deviation Low Alarm

VALUE

REF

DEV_HIGH

HY_DHIGH

DEV_LOW

HY_DLOW

REAL

BOOL

DEV_H

DEV_L

Alarm Type Description

Deviation High

The output DEV_H is active if it is TRUE the condition

VALUE > (REF +( DEV_HIGH + HY_DHIGH))

Deviation Low

The output DEV_L is active if it is TRUE the condition

VALUE < (REF + (DEV_LOW - HY_DLOW))

Input Default values

VALUE 0.0

REF 0.0

ABS_HIGH 0.0

HY_AHIGH 1.0

ABS_LOW 0.0

HY_ALOW 1.0

Output Default values

DEV_H FALSE

DEV_L FALSE