Specifications

sigmadue - IEC 61131-3 Function Block Library

1-3-5 ALARM RATE

FB Prototype

ALARM_RATE

Input parameters

Output parameters

Description

This function block generate an alarm if the input value changes with a slope rate

grater than the set limits.

Default values

Label Type Description

ENABLE BOOL Function block enable input

VALUE REAL Measure value input

SLOPE_UP REAL UP rate input variation per second

SLOPE_DOWN REAL DOWN rate input variation per second

HYST REAL Hysteresis

Label Type Description

CONFIRM BOOL Function block confirm

DOUT BOOL Active if input slope rate exceeds max./min. limits

ENABLE

VALUE

SLOPE_UP

SLOPE_DOWN

HYST

BOOL

REAL

BOOL

CONFIRM

DOUT

Input Default value

ENABLE FALSE

VALUE 0.0

SLOPE_UP 0.0

SLOPE_DOWN 0.0

HYST 0.0

Output Default value

CONFIRM FALSE

DOUT FALSE